Automobile 1
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Naweed PatelAutomobile 1
Uploaded by
Naweed PatelThe function of anti-lock brake system (ABS) is that is
A.Reduces the stopping distance
B.Minimizes the brake fade
C.Maintains directional control during braking by preventing the wheels from locking
D.Prevents nose dives during braking and thereby postpones locking of the wheels
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Answer & Solution
Answer: Option C
Solution:
The function of anti-lock brake system (ABS) is that isThe function of anti-lock brake system (ABS) is that is
Maintains directional control during braking by preventing the wheels from locking
An anti-lock braking system is a safety anti-skid braking system used on aircraft and on land vehicles
ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive
contact with the road surface
2
The basic characteristics of a brake fluid is
A.A high boiling point
B.Low viscosity
C.Compatibility with rubber and metal parts
D.All of these
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Answer & Solution
Answer: Option D
Solution:
Brake fluid is subjected to very high temperatures, especially in the wheel cylinders of drum brakes and
disk brake calipers. It must have a high boiling point to avoid vaporizing within the lines.
Low viscosity
Compatibility with rubber and metal parts
3.
Wheel base of a vehicle is the
A.Distance between the centres of the front and rear wheels
B.Distance between the centres of the front tyres
C.Distance between the centres of the rear tyres
D.Extreme length of the vehicle
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Answer & Solution
Answer: 0ption A
Solution:
Wheel base of a vehicle is the Distance between the centres of the front and rear wheels
4.
The negative plates of a lead acid battery has
A.Lead peroxide (Pb02)
B.Spongy lead (Pb)
C.Lead sulphate (PbS0,)
D.Sulphuric acid (H2So,)
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Answer & Solution
Answer: 0ption B
Solution:
The negative plates of a lead acid battery has Spongy lead (Pb)
5.
The positive plates of a lead acid battery has
A.Lead peroxide (Pb02)
B.Spongy lead (Pb)
C.Lead sulphate (PbS0,)
D.Sulphuric acid (H2SO,)
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Answer & Solution
Answer: 0ption A
6.
The purpose of transmission in an automobile is
A.To vary the speed of automobile
B.To vary the torque at the wheels
C.To vary the power of automobile
D.None of these
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Answer & Solution
Answer: 0ption B
Solution:
The function of any transmission is transferring engine power to the driveshaft and rear wheels.
Gears inside the transmission change the vehicle's drive-wheel speed and torque in relation to engine
speed and torque
1.
The stroke of an engine is the
A.Volume of the cylinder
B.Length of the connecting rod
C.Internal diameter of the cylinder
D.Distance between T.D.C. and B.D.C.
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Answer & Solution
Answer: Option D
Solution:
The stroke of an engine is the Distance between T.D.C. and B.D.C.
8.
The seat belt tensioners are built in the
A.Front seats
B.Shoulder anchors
C.Seat belt retractors
D.Seat belt buckles
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Answer & Solution
Answer: Option C
Solution:
The seat belt tensioners are built in the Seat belt retractors
9.
The basic part of the engine, to which the other engine parts
are attached or assembled is the
A.Cylinder head
B.Crankshaft
C.Cylinder block
D.Oil pan
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Answer & Solution
Answer: Option C
Solution:
The basic part of the engine to which the other engine parts are attached or assembled is the cylinder
block
An engine block is the structure which contains the cylinders, and other parts, of an internal combustion
engine. In an early automotive engine, the engine block consisted of just the cylinder block, to which a
separate crankcase was attached.
10.
The natural gas is compressed in a CNG cylinder at a
pressure of
A.200 bar
B.220 bar
C.250 bar
D.300 bar
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Answer & Solution
Answer: 0ption A
11.
The function of an alternator in an automobile is to
A.Supply electric power
B.Converts mechanical energy into electrical energy
C.Continually recharges the battery
D.Partly converts engine power into electric power
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Answer & Solution
Answer: 0ption C
Solution:
Alternators are used in modern automobiles to charge the battery and to power the electrical system
when its engine is running.
12
The crankshaft of a typical inline four cylinder engine has
balance weights.
A.12
B.4
C.16
D.8
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Answer & Solution
Answer: 0ption D
Solution:
The crankshaft of a typical inline four cylinder engine has 8 balance weights.
13
Incomparison with a radial tyre, one advantage of a bias ply
tyre is
A.Longer life
B.Lower rolling resistance
C.Smoother ride at low speeds
D.None of these
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Answer & Solution
Answer: Option C
Solution:
In comparison with a radial tyre one advantage of a bias ply tyre is Smoother ride at low speeds
14.
The power source for a brake booster is
A.Exhaust manifold pressure
B.Electricity
C.The pressure difference between the atmospheric pressure and the vacuum pressure in
the intake manifold
D.Hydraulic pump
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Answer & Solution
Answer: Option C
Solution:
The power source for a brake booster is the pressure difference between the atmospheric pressure and
the vacuum pressure in the intake manifold
15.
The path taken by intake air is
A.Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders
B.Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders
C.Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders
D.Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders
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Answer & Solution
Answer: 0ption D
16.
Petrol that detonates easily is called
A.High octane petrol
B.Low octane petrol
C.Unleaded petrol
D.Blended fuel
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Answer & Solution
Answer: Option B
Solution:
The higher the octane number, the more compression the fuel can withstand before detonating
Therefore, high compressibility of the fuel matters mainly for gasoline engines.
Use of gasoline with lower octane numbers may lead to the problem of engine knocking
17.
The device for smoothening out the power impulses from
the engine is called
A.Clutch
B.Differential
C.Flywheel
D.Torque converter
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Answer & Solution
Answer: 0ption C
Solution:
A flywheel is amechanical device specifically designed to efficiently store rotational energy.
Flywheels resist changes in rotational speed by their moment of inertia.
The amount of energy stored in a flywheel is proportional to the square of its rotational speed
18.
The compression ratio of a petrol engine is nearly
A.4:1
B.8:1
C.15:1
D.20:1
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Answer & Solution
Answer: 0ption B
Solution:
The compression ratio of a petrol engine is nearly 8:1
19
The effect of having excess camber is
A.Excessive steering alignment torque
B.Hard steering
C.Too much traction
D.Uneven tyre wear
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Answer & Solution
Answer: 0ption D
Solution:
Excessive camber angle can lead to increased tire wear and impaired handling.
With these control arms installed,
tire camber can be effectively changed by simply moving the tires.
20
In automobiles G.V.W. refers to
A.Gross vehicle width
B.Gross vehicle weight
C.Gross vehicle wheel base
D.Gross vehicle wheel track
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Answer & Solution
Answer: 0ption B
21.
Diesel engines, during suction stroke,. is drawn in
the cylinder.
A.Air and fuel
B.Only fuel
C.Only air
D.None of these
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Answer 8&
Solution
Answer: 0ption C
Solution:
In Diesel engines, during suction stroke only air is drawn in the cylinder.
22
The characteristic that is enhanced by the honing of cylinder
sleeves inner surface is
A.Cooling efficiencY
B.Resistance to wear
C.Lubrication performance
D.None of these
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Answer & Solution
Answer: Option C
Solution:
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is Lubrication
performance
23.
Damper is also known as
A.Shock absorber
B.Torsion bar
C.Spring
D.Radius rod
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Answer & Solution
Answer: 0ption A
Solution:
A damper is a device that deadens, restrains, or depresses. Damper may refer to Dashpot which is a type of
hydraulic or mechanical damper, Shock absorber.
it is a mechanical device designed to dissipate kinetic energy.
24.
The valve overlap in four stroke petrol engines is
approximately
A.30°
B.60
C.900
D.120°
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Answer & Solution
Answer: 0ption A
Solution:
The valve overlap in four stroke petrol engines is approximately at 30°
25.
The coefficient of friction for the clutch facing is
approximately
A.0.1
B.0.4
C.0.8
D.1.2
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Answer & Solution
Answer: 0ption B
26
The oil pump is driven by the
A.Camshaft
B.Alternator shaft
C.Crankshaft via drive belt
D.Crankshaft directly
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Answer & Solution
Answer: Option D
Solution:
In most engines the oil pump is driven by a gear attached to the crankshaft.
This is no always a direct drive,
sometimes on older engines, the pump was driven by the camshaft gears or even the idler gear.
27.
Which of the following oil is more viscous?
A.SAE 30
B.SAE 40
C.SAE 70
D.SAE 80
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Answer & Solution
Answer: 0ption D
Solution:
SAE stands for Society of Automobile Engineers and they standardise a lot of components that are used to
build an automobile.
From Pipes to electronics to oils.
As for SAE 80 is more viscous
28
Which of the following indicates multi-grade oil?
A.SAE 30
B.API SF
C.SAE20 W50
D.API 50
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Answer & Solution
Answer: Option C
Solution:
SAE20 W50 indicates multi-grade oil
29
One effect of detonation is
A.Delay in ignition
B.Loss of power
C.Overheating of engine
D.Overcooling of engine
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Answer & Solution
Answer: 0ption B
Solution:
when detonation occurs, the fuel charge ignites quickly in an uncontrolled explosion, causing a pounding
or hammering force on the piston rather than a steady push.
Moderate to severe detonation could be noticed as engine roughness, vibration or loss of power and
eventually engine damage.
30.
The main cause for the change in engine oil viscosity is
A.Humidity
B.Temperature
C.Vibration
D.Contamination
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Answer & Solution
Answer: 0ption B
31.
The purpose of adding pigment to the paint is that it
A.Optimises the viscosity of paint
B.Makes paint film hard
C.Gives colour and filling up effect to the paint
D.None of the above
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Answer & Solution
Answer: Option C
Solution:
The purpose of adding pigment to the paint is that it Gives colour and filling up effect to the paint
32
The two kinds of piston rings are
A.Compression and oil control rings
B.Compression and sliding seal rings
C.Oil scrapper and oil control rings
D.Pressure and sealing rings
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Answer & Solution
Answer: 0ption A
Solution:
The two kinds of piston rings are Compression and oil control rings
33.
The function of a first compression ring (top ring) is that it
A.lncreases the combustion temperature
B.Creates swirl
C.Maintains a seal and prevents the fuel leakage
D.Maintains a seal and prevents escape of burned gases and loss of pressure in the
combustion chamber
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Answer & Solution
Answer: Option D
Solution:
The function of a first compression ring is that it Maintains a seal and prevents escape of burned gases and
loss of pressure in the combustion chamber
34.
The function of oil control rings is that it
A.Lubricates the cylinder wall by releasing oil from its hole
B.Keeps the cylinder wall lubricated by holding oil in its channel
C.Prevents engine oil from going into the combustion chamber and returns excess
lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
D.Maintains a seal and prevents escape of burned gases and oil leakage
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Answer & Solution
Answer: 0ption C
Solution:
The function of oil control rings is that it Prevents engine oil from going into the combustion chamber and
returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
35.
The torque available at the contact between driving wheels
and road is known as
A.Brake effort
B.Tractive effort
C.Clutch effort
D.None of these
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Answer & Solution
Answer: 0ption B
36.
The sequence order of events in a four stroke engine is
A.Suction exhaust power compression
B.Suction power compression exhaust
C.Suction compression power exhaust
D.Exhaust compression power suction
Answer & SolutionDiscuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption C
Solution:
The sequence order of events in a four stroke engine is Suction compression power exhaust
37.
The basic function of the suspension is to
A.Absorbs vibration and impact forces from the road surface
B.Ensure that the steering wheel can deliver a suitable amount of steering force
C.Ensure that wheel alignment is not disturbed during driving
D.Automatically correct the effects of over steering
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Answer & Solution
Answer: Option A
Solution:
The primary functions of the suspension system include maximizing the contact between the tires and the
road surface, providing steering stability and good handling, evenly supporting the weight of the vehicle
and ensuring the comfort of passengers by absorbing and dampening
38
In a four speed four stroke Diesel engine, the intake valve
A.Opens at T.D.C. and closes at B.D.C.
B.Opens at 20° before T.D.C. and closes at 35° after B.D.C.
C.Opens at 10° after T.D.C. and closes at 20° before B.D.C.
D.None of the above
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Answer & Solution
Answer: Option B
Solution:
In a four speed four stroke Diesel engine, the intake valve Opens at 20° before T.D.C. and closes at 35°
after B.D.C.
39
The forced fed lubrication system means that the oil is
delivered to the engine by
A.Gravity
B.The pressure created by the oil pump
C.Splashing action of the crankshaft
D.None of these
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Answer & Solution
Answer: 0ption B
Solution:
The forced fed lubrication system means that the oil is delivered to the engine by The pressure created by
the oil pump
40.
The torque converter uses to transfer torque.
A.Air
B.Automatic transmission fluid (ATF)
C.Gears
D.Steel belt
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Answer & Solution
Answer: Option B
41.
When turning a corner
A.The front wheels are toeing out
B.The front wheels are turning on different angles
C.The inside front wheels has a greater angle than the outside wheel
D.All of the above
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Answer & Solution
Answer: 0ption D
Solution:
When turning a corner
- The front wheels are toeing out
- The front wheels are turning on different angles
-The inside front wheels has a greater angle than the outside wheel
42.
The drive-shafts are connected to the differential and wheel
hubs through universal joints because the universal joints
A.Absorb the vibrations transferred from the surface of the road
B.Compensate for variations in the relative positions of the differential and the wheels
which result from bumpy road surfaces or other similar driving conditions.
C.Absorb any difference in speed between the left and right wheels when the vehicle is
turning
D.None of the above
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The drive-shafts are connected to the differential and wheel hubs through universal joints because the
universal joints Compensate for variations in the relative positions of the differential and the wheels which
result from bumpy road surfaces or other similar driving conditions.
43.
Tachometer in a vehicle measures
A.Speed
B.Distance
C.Engine r.p.m.
D.Fuel consumption
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Answer & Solution
Answer: Option C
Solution:
A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other
machine.
The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital
displays are increasingly common.
44.
When indicated power (1.P.) and frictional power (F.P.) are
known, we can calculate
A.Brake power
B.Compression ratio
C.Specific air consumption
D.Mean effective pressure
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Answer & Solutiobn
Answer: 0ption A
Solution:
When indicated power (1.P.) and frictional power (F.P.) are known, we can calculate Brake power
Friction Power = Indicated power Brake Power
-
45.
The main characteristics of a maintenance free (MF) battery
is that
A.A maintenance free battery requires little maintenance during normal use and it is
sufficient to add water instead of an electrolyte containing sulphuric acid
B.A maintenance free battery has a relatively short shelf life when compared with standard
batteries
C.Since it is sealed, the water in maintenance free battery is not lost through evaporation
thus accordingly it is not necessary to top up the cells with water
D.Recharging of a maintenance free battery is neither required nor possible
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
46.
If the engine coolant leaks into the engine oil, then engine oil
A.Appears milky
B.Become foamy
C.Turns black
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
If the engine coolant leaks into the engine oil, then engine oil Appears milky
47.
The connecting rod lower end is connected to the relevant
of crankshaft.
A.Big end
B.Crank arm
C.Journal
D.Small end
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option C
Solution:
The connecting rod lower end is connected to the relevant journal of crankshaft.
48.
A heat treated glass generally used in automobiles bursts
into. upon cracking,
A.Sharp edged fragments
B.Small particles
C.Large particles
D.None of these
Answer & Solution DisCuss in Board Save for Late
Answer & Solution
Answer: 0ption B
Solution:
A heat treated glass generally used in automobiles bursts into Small particles upon cracking,
49.
Inorder to implement gear changes in the gear unit of an
automatic transmission, a is used.
A.Synchronizer
B.Planetary gear
C.Magnetic clutch
D.Hydraulic multi plate clutch
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Answer & Solution
Answer: Option D
Solution:
In order to implement gear changes in the gear unit of an automatic transmission a Hydraulic multi plate
clutch is used.
50.
The engine oil viscosity is defined by. -ratings.
A.Automatic transmission fluid (ATF)
B.Society of automotive engineers (SAE)
C.Gross vehicle weight (GVW)
D.American petroleum institute (API)
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption B
51.
The camshaft of a four stroke Diesel engine running at 1000
rpm will run at
A.500 rpm
B.1000 rpm
C.2000 rpm
D.4000 rpm
Answer & Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption A
Solution:
The camshaft of a four stroke Diesel engine running at 1000 rpm will run at 500 rpm
52
The difference between DOT 3 and DOT 4 brake fluids is
A.DOT 4 fluids have a higher boiling point than DOT 3 fluid
B.DOT 4 fluids have a lower boiling point than DOT 3 fluid
C.DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service
life
D.DOT 4 fluid is more resistant to freezing than DOT 3 fluid
Answer &Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption A
Solution:
The difference between DOT 3 and DOT 4 brake fluids is DOT 4 fluids have a higher boiling point than DOT
31fluid
53.
The condition that causes vapour locking in a brake system
is
A.Overheating of the fluid due to frequent brake application
B.Overcooling of the brakes during high speed driving
C.Keeping the vehicle without use for an extended period
D.An excessively high engine speed on a downhill road
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
vapour locking in a brake system is Overheating of the fluid due to frequent brake application
54.
Which of the following symptom is caused as a result of
brake disc run out?
A.Ineffectiveness of the brakes
B.Judder during braking
C.Localized wearing of the brake pads
D.Rapid wearing of the brake pads
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
Judder during braking is caused as a result of brake disc run out
55.
The octane rating of petrol commercially available is
A.85-95
B.95-100
C.100-110
D.110-125
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
56.
If thespark plug deposit indicates black coating of soot, it
indicates that the engine has been generally operating on
A.Too lean mixture
B.Stoichiometric mixture
C.Most economical mixture
D.Too rich mixture
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
If thespark plug deposit indicates black coating of soot, it indicates that the engine has been generally
operating on Too rich mixture
57.
A maintenance free battery
A.Has lead-antimony plate grid
B.Has lead-calcium plate grid
C.Does not contain acid
D.Does not contain water
Answer& SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
A maintenance free battery has lead-calcium plate grid
58.
The correct way to rectify an imbalanced wheel is to
A.Adjust the tyre pressure
B.Rotate the tyres
C.Adjust the damper spring tension
D.Attach appropriate weights to the wheel at appropriate positions
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The correct way to rectify an imbalanced wheel is to Attach appropriate weights to the wheel at
appropriate positions
59
The purpose of a balancer shaft is to
A.Balance the timing in the movement of the two groups of pistons
B.Increase inertia force of the rotating crankshaft
C.Reduce vibrations caused by the crankshaft rotation
D.Adjusts the timing of the intake and exhaust valve openings
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option C
Solution:
The purpose of a balancer shaft is to Reduce vibrations caused by the crankshaft rotation
60.
An under-inflated tyre will wear the tread most
A.Near the centre
B.Near the edges
C.In the lateral direction
D.In the cross direction
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
61.
A worm gear is used as the pinion for the rack and pinion
type of steering gearbox, because it
A.lmproves steering comfort when steering wheel is turned to effect small changes in the
direction of forward motion
B.Allows the steering wheel to be turned by a greater amount when steering
C.Makes the steering more responsive
D.Reduces the amount of kickback for large steering angles
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it Improves
steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
62.
The petrol engines are also known as
A.Spark ignition (S.1.) engines
B.Compression ignition (C.I.) engines
C.Steam engines
D.None of these
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The petrol engines are also known as Spark ignition (S.l.) engines
63.
The Diesel engines are also known as
A.Spark ignition (S.L.) engines
B.Compression ignition (C.I.) engines
C.Steam engines
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The Diesel engines are also known as Compression ignition (C.I.) engines
64.
The self ignition temperature of Diesel as compared to
petrol is
A.Higher
B.Lower
C.Same
D.Depends on fuel quality
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The self ignition temperature of Diesel as compared to petrol is lower
65.
A laminated glass upon cracking
A.Bursts into sharp edged fragments
B.Bursts into granular pieces
C.Sandwiched layer traps the fragments
D.Breaks into the form of crystals
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption C
66.
Highest useful compression ratio (HUCR) is the highest
compression ratio at which the
A.Engine can run
B.Engine gives maximum output
C.Engine is most efficient
D.Fuel can be used in a test engine without knocking
Answer &Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption D
Solution:
Highest Useful Compression Ratio (HUCR) is the compression ratio at which a fuel can be used without
detonation in a specified test engine under specified operating condition and the ignition and mixture
strength being adjusted to give best efficiency
67.
When the battery is half (50%) charged, the specific gravity
of acid ina battery is usually
A.0.74
B.1.00
C.1.12
D.1.19
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
When the battery is half (50%) charged, the specific gravity of acid in a battery is usually 1.19
68.
The main task of a battery in automobiles is too
A.Supply electricity to the alternator
B.Act as a reservoir or stabilizer of electricity
C.Supply electricity to the vehicle's electrical system at all times while the engine is running
D.Supply a large amount of power to turn the starter motor when the engine is being
started
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option D
Solution:
An automotive battery is a rechargeable battery that supplies electrical current to a motor vehicle.
Its main purpose is to feed the starter, which starts the engine.
Once the engine is running, power for the car's electrical systems is supplied by the alternator.
69.
The function of a governor in automobiles is to
A.Limit the power
B.Limit the vehicle speed
C.Maintain constant engine speed
D.Maximise the fuel economy
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The function of a governor in automobiles is to limit fuel to the engine to a maximum safe speed when
unloaded and to maintain a relatively constant speed despite changes in loading.
70.
The basic purpose of tyre rotation on automobiles is to
A.Avoid ply separation
B.Equalize wear
C.Get better ride
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
1.
The vehicle ride will be comfortable if
A.Unsprung mass is kept minimum
B.Sprang mass is kept minimum
C.Vehicle mass is kept minimum
D.All of these
Answer &Solution Discuss in Board Save for Late
Answer & Solution
Answer: 0ption A
Solution:
The vehicle ride will be comfortable if Unsprung mass is kept minimum
2.
four stroke engine for each crankshaft revolution, the
In a
camshaft revolves
A.One half turn
B.One turn
C.Two turns
D.Four turns
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
In a four stroke engine for each crankshaft revolution, the camshaft revolves One half turn
3.
A battery can be charged by
A.Adding distilled water
B.Adding sulphuric acid
C.Applying voltage in the reverse direction to that of charging
D.Applying a voltage in the same direction to that of charging
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
A battery can be charged by Applying voltage in the reverse direction to that of charging
4.
The process of removing the burnt gases from the engine
cylinder by the fresh charge coming into the engine cylinder
from the crankcase, is known as
A.Cleaning
B.Priming
C.Scavenging
D.Detonation
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option C
Solution:
scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh
draught of air or fuel/air mixture for the next cycle. This process is essential in having a smooth-running
internal combustion engine.
5.
Caster isa
A.Forward tilt of the kingpin
B.Backward tilt of the kingpin
C.Either 'A' or 'B'
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
6
The valve tappet clearance is measured by
A.Screw pitch gauge
B.Engineering scale
C.Feeler gauge
D.Vernier caliper
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Afeeler gauge is a tool used to measure gap widths.
Feeler gauges are mostly used in engineering to measure the clearance between two parts
7.
The parking brakes employed in vehicles are operated
A.Mechanically
B.Hydraulically
C.Pneumatically
D.None of these
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption A
Solution:
The parking brake is connected to the rear brakes, which do not exert as much force in braking as the front
brakes and will do little to stop a vehicle moving at high speeds.
8.
Free pedal play in car clutches is about
A.15 mm
B.25 mm
C.40 mmn
D.60 mmn
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
Free pedal play in car clutches is about 25 mm
9.
The function of a connecting rod is
A.To turn the flywheel
B.To drive the drive plate
C.To drive the fuel pump
D.To transmit motion of the piston to the crankshaft
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
A connecting rod is an engine component that transfers motion from the piston to the crankshaft and
functions as a lever arm.
Connecting rods are commonly made from cast aluminum alloy and are designed to withstand dynamic
stresses from combustion and piston movement.
10
The rolling resistance is because of the friction between the
A.Wheel rim and tyre
B.Tyre and the road surface
C.Wheel rim and road surface
D.None of these
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption B
11.
The aspect ratio (expressed in percentage) of the tyre is
defined as the ratio of
A.Section width to section height
B.Section height to section width
C.Wheel diameter to section height
D.Wheel diameter to section width
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of Section height to section
width
12
The composition of the electrolyte in a fully charged battery
is that
A.The electrolyte is pure distilled water
B.The electrolyte is pure sulphuric acid
C.The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
D.The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The composition of the electrolyte in a fully charged battery is that The electrolyte is a mixture of 64%
distilled water and 36% sulphuric acid by weight
13.
The instrument used to check specific gravity of acid in a
battery is
A.Hydrometer
B.Hygrometer
C.Anemometer
D.Multimeter
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
A hydrometer is an instrument used for measuring the relative density of liquids based on the concept of
buoyancy.
They are typically calibrated and graduated with one or more scales such as specific gravity.
14.
The size of engine cylinder is referred in terms of itss
A.Diameter and bore
B.Displacement and efficiency
C.Bore and stroke
D.Bore and length
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The size of engine cylinder is referred in terms of its Bore and stroke
15
Clutch facings are usually attached to the plate by
A.Steel rivets
B.Brass rivets
C.Aluminium screws
D.Steel screws
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
16.
When the brake pedal free play is less than the specified
value, then the
A.Brake drags
B.Brake fades
C.Vapour locking occurs in the brake lines
D.Antilock braking system malfunctions
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
When the brake pedal free play is less than the specified value, then the Brake drags
17.
A petrol engine of a car develops 125 Nm torque at 2700
r.p.m. The car is driven in second gear having gear ratio of
1.75. The final drive ratio is 4.11. Ifthe overall transmission
efficiency is 90%, then the torque available at the driving
wheels is
A.8.091 Nm
B.80.91 Nm
C.809.1 Nm
D.8091 Nm
Answer & Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption C
Solution:
Torque gear ratio * final drive ratio *
overall transmission efficiency.
T 1.75 * 4.11 * 90/100 * 125,
T= 809.1 Nm.
18.
For the same maximum pressure and temperature
A.Diesel cycle is more efficient than Otto cycle
B.Otto cycle is more efficient than Diesel cycle
C.Both Otto cycle and Diesel cycle are equally efficient
D.None of the above
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
For the same maximum pressure and temperature Diesel cycle is more efficient than Otto cycle
19.
The engine oil is stored in when the engine is not
running.
A.Oil pan
B.Cylinder head
C.Oil pump
D.Separate oil tank
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption A
Solution:
The engine oil is stored in oil pan when the engine is not running.
20.
The major purpose of an electronically controlled automatic
transmission is that this type of transmission
A.Eliminates gear clutches
B.Eliminates the gear shaft lever
C.Reduces the number of automatic transmission components
D.Reduces shift shock and achieves more efficient transmission of engine torque
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
21.
The basic purpose of providing caster angle on wheels is too
A.Prevent uneven tyre wear
B.Maintain directional control
C.Bring the road contact of the tyre under the point of load
D.Compensate for wear in the steering linkage
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
Excessive caster angle will make the steering heavier and less responsive, although in racing large caster
angles are used for improving camber gain in cornering.
22.
The coefficient of rolling resistance for a truck weighing
63,500 N is 0.018. The rolling resistance to the truck is
A.1.143 N
B.11.43 N
C.114.3 N
D.1143 N
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
As per given data,
Truck weight = 63500 N.
Coefficient of rolling = 0.018.
*
Equation: Rolling resistance= Coefficient of rolling weight.
Rolling resistence 0.018* 63500 = 1143 N
23
Instead of valves, the ports are used in case of
A.Four stroke I.C. engines
B.Two stroke 1.C. engines
C.V6 engines
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
Instead of valves, the ports are used in case of two stroke I.C. engines
24.
An overinflated tyre will wear the tread most near the
A.Edges
B.Corners
C.Centre
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption C
Solution:
An overinflated tyre will wear the tread most near the centre
25.
The connecting rods are generally made of .
shaped cross-section.
A.I
B.C
C.L
D.H
Answer & Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption A
26
The problems caused by the wheel imbalance are
A.Hard steering and hard ride
B.Poor acceleration and hard steering
C.Steering wheel vibrations and uneven tyre wear
D.Poor acceleration and reduced fuel efficiency
Answer & Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption C
Solution:
The problems caused by the wheel imbalance are
Hard steering and hard ride.
Poor acceleration and hard steering.
Steering wheel vibrations and uneven tyre wear.
Poor acceleration and reduced fuel efficiency.
27.
The compression ratio in petrol engine is kept less than in
Diesel engine because
A.It makes petrol engines lighter
B.Higher or equivalent compression ratio in petrol engines is not possible due to pre-
ignition
C.Less compression ratio gives better performance
D.It is just customary to have less compression ratio in petrol engines
Answer & Solution Discuss in Board Save for Laten
Answer & Solutiopn
Answer: 0ption B
Solution:
The compression ratio in petrol engine is kept less than in Diesel engine because Higher or equivalent
compression ratio in petrol engines is not possible due to pre-ignition
28.
In a Diesel engine, the function of a fuel injector is to
A.Mix the fuel and air
B.Ignite the air-fuel mixture
C.Provide flame front for ignition
D.Spray atomized fuel in the cylinder
Answer & Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption D
Solution:
The purpose of the fuel injection system is to deliver fuel into the engine cylinders, while precisely
controlling the injection timing, fuel atomization, and other parameters.
29
air-fuel mixture in a spark ignition engine is t0o rich,
If the
then air-fuel ratio is about
A.17:1
B.15:1
C.13:1
D.10:1
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about 10:1
30.
The service brakes employed in cars are generally operated
A.Mechanically
B.Hydraulically
C.Pneumatically
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
31.
A front stabilizer bar is used to
A.Increase vehicle load carrying capacity
B.Provide a softer ride
C.Control suspension movement and body roll
D.All of the above
Answer &Solution Discuss in Board Save for Late
Answer & Solution
Answer: Option C
Solution:
front stabilizer bar is a part of many automobile suspensions that helps reduce the body roll of a vehicle
during fast cornering or over road irregularities.
32.
The aluminium alloy is used in cylinder blocks because
A.It is lighter and has good heat dissipation characteristics
B.Material cost is low
C.It does not require any cylinder liners
D.The piston is also made of aluminium alloy
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The aluminium alloy is used in cylinder blocks because It is lighter and has good heat dissipation
characteristics
33.
The main function of a master cylinder is to
A.Adjust the extent of brake pedal free play
B.Boost the force applied to brake pedal
C.Convert brake pedal force into hydraulic pressure
D.Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The master cylinder, also known as the master brake cylinder, converts the pressure on the brake pedal to
hydraulic pressure by feeding brake fluid into the brake circuit and controlling this according to the
mechanical force.
Master brake cylinders are used both in disc brakes and drum brakes.
34
The firing order for an inline four cylinder I.C. engine is
A.1-2-3-4
B.1-3-4-2
C.1-2-4-3
D.1-3-2-4
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option B
Solution:
The firing order for an inline four cylinder 1.C. engine is 1-3-4-2
35
The firing order for an opposed four cylinder I.C. engine is
A.1-2-3-4
B.1-3-4-2
C.1-4-3-2
D.1-3-2-4
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
36.
The indicated power of a four stroke engine (in watts) is
equal to (where P = Mean effective pressure in N/m2, L
Length of stroke in metres, A = Cross-sectional area of the
piston in m2, and N = Speed of the engine in revolutions per
second (r.p.s)
A.P.L.A.N/2
B.P.L.A.N
C.2 x P.L.A.N
D.P.L.A.N/4
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
37.
The rating of C.l. engine fuel (Diesel) is given by
A.Octane number
B.Performance number
C.Cetane number
D.None of these
Answer& SolutionDiscuss in Board Save for Later
Answer & Solutiopn
Answer: Option C
Solution:
Cetane number is an indicator of the combustion speed of diesel fuel and compression needed for ignition.
The rating of C.I. engine fuel (Diesel) is given by Cetane number
38.
The capacity of a battery is usually expressed in terms of
A.Volts
B.Amperes
C.Weight
D.Ampere hours
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The capacity of a battery is usually expressed in terms of Ampere hours
39
clearance volume of
If I.C. engines is increased, the
Compression ratio will
A.Increasse
B.Decrease
C.Remain constant
D.Be doubled
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
If clearance volume of I.C. engines is increased, the compression ratio will Decrease
40.
The calorific value of Diesel is about
A.36.5 MJ/kg
B.38.5 MJ/kg
C.42.5 MJ/kg
D.45.5 MJ/kg
Answer & Solution Discuss in Board Save for Late
Answer & Solution
Answer: 0ption D
41.
The specific gravity of Diesel is about
A.0.65
B.0.75
C.0.85
D.0.95
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The specific gravity of Diesel is about 0.85
42.
A four cylinder engine has a capacity of 2.4 litres. The swept
volume of one cylinder is
A.400 cm*
B.600 cmn
C.1200 cm*
D.2400 cm3
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
Volume of one cylinder will be 2.4/4 0.6 litres or 600 cubic centimeters.
43.
The calorific value of petrol is about
A.36.5-38.5 MJ/kg
B.39.4-42.5 MJ/kg
C.42.7-43.5 MJ/kg
D.45.5-47 MJ/kg
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option C
Solution:
The calorific value of petrol is about 42.7-43.5 MJ/kg
44.
The specific gravity of petrol is about
A.0.75
B.0.85
C.0.95
D.1.25
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The specific gravity of petrol is about 0.75
45
The crescent shaped cavity on the piston head top surface is
called as
A.Piston oil hole
B.Snap ring
C.Valve recess
D.Valve clearance
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
46.
The formula for Iso-octane is
A.C8H18
B.C7H17
C.C6H18
D.C7H18
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The formula for Iso-octane is C8H18
47.
The mechanical efficiency (nm) of an I.C. engine is equal to
(where I.P. = Indicated power, B.P. = Brake power and F.P. =
Frictional power)
A.I.P/B.P.
B.B.P/1.P.
C.B.P/F.P.
D.F.P/B.P.
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The mechanical efficiency (nm) of an I.C. engine is equal to B.P/1.P.
where
L.P. = Indicated power,
B.P. Brake power
F.P. = Frictional power
48.
The function of a second ring is that it is a
A.Back up compression ring which will work in place of the top ring when it is broken
B.Compression ring and aids the top ring in sealing and cooling
C.Back up oil control ring which will work in place of the bottom ring when it is broken
D.Cushion ring which prevents piston slap and knock
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The function of a second ring is that it is a Compression ring and aids the top ring in sealing and cooling
49
The starting system includes
A.A battery, a starter, and an ignition switch
B.A battery, a distributor, and an ignition switch
C.A battery, a starter, and a distributor
D.A distributor, a starter, and an ignition switch
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The starting system includes A battery, a starter, and an ignition switch
50.
The parking brake generally acts on
A.Front wheels
B.Rear wheels
C.Front and rear wheels
D.Propeller shaft
Answer& SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
51.
The tyre rotation is generally done at
A.1000 km
B.4000 km
C.6000 km
D.10,000 km
Answer& SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The tyre rotation is generally done at 10,000 km
52.
The most accurate ignition system of a spark ignition engine
is
A.Magneto system
B.Battery system
C.Electronic control unit system
D.Magneto and electronic system
Answer& SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The most accurate ignition system of a spark ignition engine is Electronic control unit system
53.
In Diesel engines, the duration between the time of injection
and the time of ignition is called
A.Spill cut-off
B.Delay period
C.Injection period
D.Ignition period
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
the duration between the time of injection and the time of ignition is called Delay period
54.
The discharged lead acid battery has on its plates
A.Lead peroxide (Pb02)
B.Spongy lead (Pb)
C.Lead sulphate (PbS0,)
D.Sulphuric acid (H2S0,)
Answer & Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption C
Solution:
The discharged lead acid battery has on its plates Lead sulphate (PbSO4)
55.
The main function of the brake fluid is
A.Lubrication
B.Power transmission
C.Cooling
D.None of these
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
56.
The tilting of the front wheels away from the vertical, when
viewed from the front of the car, is called
A.Camber
B.Caster
C.Toe in
D.Toe out
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option A
Solution:
The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
Camber
57.
The correct flow of power through the drive train is
A.Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
B.Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
C.Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
D.Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
Answer& Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption B
Solution:
The correct flow of power through the drive train is Engine clutch, main shaft, counter shaft, final driven
gear, drive shafts, wheels
58.
The gear shift lever requires two separate motions to shift
gears, and the first movement
A.Moves the synchronizer
B.Selects the synchronizer
C.Meshes the gears
D.Operates the clutch
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The gear shift lever requires two separate motions to shift gears, and the first movement Selects the
synchronizer
59
The order in which effort applied to the steering wheel is
transferred to the front wheel is
A.Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
B.Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
C.Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels
D.Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The order in which effort applied to the steering wheel is transferred to the front wheel is Steering wheel,
steering shaft, steerings gearbox, tie rod, steering knuckle, front wheels
60.
Which of the following bulb in a car will have the least
wattage?
A.Head light bulb
B.Stop light bulb
C.Parking light bulb
D.lgnition warning bulb
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
61.
The connecting rod connects the piston and the
A.Cylinder head
B.Cylinder block
C.Camshaft
D.Crankshaft
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The connecting rod connects the piston and the Crankshaft
62.
The braking control type traction control system (TCS)
generally operates in the speed range of
A.Less than 20 kmph
B.Less than 40 kmph
C.Less than 60 kmph
D.More than 60 kmph
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The braking control type traction control system (TCS) generally operates in the speed range of Less than
40 kmph
63.
The temperature indicating instrument in vehicles indicates
the temperature of
A.Engine piston
B.Engine cylinder
C.Lubricating oil
D.Jacket cooling water
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The temperature indicating instrument in vehicles indicates the temperature of Jacket cooling water
64.
The motion of the cam is transferred to the valves through
A.Pistons
B.Rocker arms
C.Camshaft pulley
D.Valve stems
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The motion of the cam is transferred to the valves through Rocker arms
65.
The purpose of a cylinder head gasket is to
A.Prevent the combustion gases from leaking from the joint between the cylinder block and
the cylinder head
B.Prevent engine oil from going into combustion chamber
C.Removes impurities from cylinder head lubricating oil
D.None of the above
Answer & Solution Discuss in Board Save for Later
Answer & Solutiobn
Answer: 0ption A
66.
The ignition in a spark ignition engine takes place when the
piston is
A.Exactly at the T.D.C. position on its compression stroke
B.Approaching the T.D.C. position on its compression stroke
C.Leaving the T.D.C. position on its compression stroke
D.Approaching the T.D.C position on its exhaust stroke
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option B
Solution:
The ignition in a spark ignition engine takes place when the piston is Approaching the T.D.C. position on its
compression stroke
67.
The minimum parking brake force is generally of
gross vehicle mass (GVM).
A.5%
B.10%
C.15%
D.20%
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The minimum parking brake force is generally 20% of gross vehicle mass (GVM).
68.
The damper fluid leakage typically occur from
A.Upper damper mounting
B.Bottom of damper
C.Clearance between inner and outer tubes of damper
D.Coil spring mounting
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The damper fluid leakage typically occur from Clearance between inner and outer tubes of damper
69.
The battery is an electrochemical device, which means
battery
A.Makes chemicals by mechanical means
B.Uses chemical action to provide electricity
C.Has curved plates instead of flat plates
D.Does not use an electrolyte
Answer & Solution Discuss in Board Save for Laten
Answer & Solution
Answer: Option B
Solution:
The battery is an electrochemical device, which means battery Uses chemical action to provide electricity
70.
The combustion process in a Diesel engine is a
A.Constant volume processS
B.Constant pressure process
C.Constant temperature process
D.Adiabatic process
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
1.
In a ventilated disc brake
A.A duct directs air towards the caliper for cooling while the vehicle is moving
B.Caliper is covered with cooling fins
C.Disc contains many small holes for optimum cooling performance
D.Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The "ventilated" disc design helps to dissipate the generated heat and is commonly used on the more-heavily
loaded front discs.
2.
A traction control system (TCS) in automobiles controls the
A.Vibrations on the steering wheel
B.Engine power during acceleration
C.Torque that is transmitted by the tyres to the road surface
D.Stopping distance in case of emergency
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
A traction control system (TCS) in automobiles controls the torque that is transmitted by the tyres to the road
surface
3.
The number of exhaust manifolds in a V6 engine is
A.One
B.Two
C.Four
D.Eight
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The number of exhaust manifolds in a V6 engine is Two
4.
The most commonly used power plant in automobiles is
A.Gas turbine
B.I.C. engine
C.Battery
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The most commonly used power plant in automobiles is I.C. engine
5.
The commonly used antifreeze solution in automobilesis
A.Carbon disulphide
B.Ethylene glycol
C.Ammonium chloride
D.Freon-12
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
6
In bias ply tyres
A.All plies run parallel to one another
B.Belts of steel mesh are used in the tyres
C.One ply layer runs diagonally one way and another layer runs diagonally the other way
D.All of the above
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Bias-ply tires are built with plies that are layered so they crisscross over each other.
This creates a more rugged design, with greater puncture resistance in the sidewall.
7.
In radial tyres
A.One ply layer runs diagonally one way and another layer runs diagonally the other way
B.All plies run parallel to one another and vertical to tyre bead
C.Inner tubes are always used
D.None of these
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
In radial tyres All plies run paralel to one another and vertical to tyre bead
8
The gradient resistance to a vehicle having a mass of 980 kg
moving on an incline of 10° is
A.1.6694N
B.16.694N
C.166.94 N
D.1669.4 N
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
given data:
mass-980 kg
angle of inclination= 10°
Equation we used is,
Gradient resistance is given by Gr = W sin(angle of inclination).
Gr 980* sin(10),
170.175 kg * 9.81,
=1669.41 N.
9
In aluminium cylinder blocks, the cylinder liners are made of
A.Aluminium
B.Ceramic
C.Brass
D.Cast iron
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
In aluminium cylinder blocks, the cylinder liners are made of Cast iron
10.
The brake pedal during ABS operation
A.ls pushed upward forcefully
B.Pedal stroke becomes longer
C.Transmits slight kickback to the driver's foot
D.All of the above
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
11.
When the front wheels of a vehicle are locked during braking,
then
A.Stopping distance becomes extremely long
B.Front tyres skid across the road surface, and the vehicle spins around
C.Rear tyres skid across the road surtace, and the vehicle spins around
D.Driver loses control over the steering, and the vehicle continues moving in its current
direction
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
When the front wheels of a vehicle are locked during braking, then Driver loses control over the steering, and
the vehicle continues moving in its current direction
12.
What type of bearing is used for main bearings and
connecting rod bearings?
A.Ball bearings
B.Plain bearings
C.Needle roller bearing
D.Taper roller bearing
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
Plain bearings are used for main bearings and connecting rod bearings
13
During braking, the brake shoe is moved outward to force the
lining against the
A.Wheel piston or cylinder
B.Anchor pin
C.Brake drum
D.Wheel rim or axle
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
During braking, the brake shoe is moved outward to force the lining against the Brake drum
14.
The cam shaft in an engine is always mounted
A.Parallel to the crankshaft
B.Perpendicular to the crankshaft
C.Inclined to the crankshaft
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The cam shaft in an engine is always mounted Parallel to the crankshaft
15.
The included angle is the sum of the
A.Camber and castor
B.Castor and S.A.I.
C.Camber and S.A.l.
D.Camber and toe in
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
16.
The purpose of turning radius gauges is to measure the
A.Contact areas of the tyres
B.Free plays of the steering wheel
C.Turning radius of the left and right wheels
D.Difference in the toe angles of the left and right wheels
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
A turning radius gauge is an instrument, consisting of a turntable and an attached gauge, which measures
how many degrees the front wheel of a vehicle has turned left or right.
17.
Two advantages of using helical gears rather than spur gears
in a transmission system are
A.Strength and cost
B.Strength and less end thrust
C.Noise level and strength
D.Noise level and economy
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
Two advantages of using helical gears rather than spur gears in a transmission system are Noise level and
strength
18.
The best fuels for compression ignition engines are
A.Straight chain paraffin
B.Aromatics
C.Branched chain paraffin
D.Naphthalene
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The best fuels for compression ignition engines are Naphthalene
19
In Spark lgnition Engine
A.Only air is introduced into the cylinder
B.The mixture of air and fuel is introduced into the cylinder from carburettor
C.Both (A) and (B)
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
In Spark Ignition Engine the mixture of air and fuel is introduced into the cylinder from carburettor
20.
The exhaust gas from petrol engine contains
A.Petrol vapours
B.Water vapours
C.Carbon monoxide
D.All of these
Answer& Solution Discuss in B0ard Save for Later
Answer & Solution
Answer: 0ption D
21.
The petrol engine works on
A.Otto cycle
B.Carnot cycle
C.Diesel cycle
D.Rankine cycle
Answer &Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The petrol engine works on Otto cycle
22.
The Diesel engine works on
A.Otto cycle
B.Carnot cycle
C.Diesel cycle
D.Rankine cycle
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The Diesel engine works on Diesel cycle
23
The Diesel engines as compared to petrol engines require
A.Bigger flywheel
B.Smaller flywheel
C.Same size of flywheel
D.No flywheel
Answer&Solution Discuss in Board Save for Laten
Answer & Solution
Answer: 0ption A
Solution:
The Diesel engines as compared to petrol engines require Bigger flywheel
24.
The cetane number of a Diesel fuel is a measure of
A.Volatility
B.Viscosity
C.1gnition quality
D.Delay period
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The cetane number of a Diesel fuel is a measure of Delay period
25.
The sequence in which the force is transmitted through a
brake system when the brake pedal is depressed is
A.Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
B.Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
C.Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
D.Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
26.
The main purpose of an engine's air cleaner is that it
A.Controls the engine's air intake volume
B.Reduces the engine's air intake noise
C.Prevents rain water from entering the engine
D.Prevents dust and other foreign matter from entering the engine
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The main purpose of an engine's air cleaner is that it Prevents dust and other foreign matter from entering
the engine
27.
It is necessary to maintain the valve clearances as they
A.Reduce the resistance to sliding that occurs between the cam and the tappet
B.Allow for lengthening of the valves owing to the heat of combustion
C.Increase the speed at which the valves move up and down
D.Make the crankshaft turn smoothly
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
necessary to maintain the valve clearances as they Allow for lengthening of the valves owing to the heat
It is
of combustion
28.
The component of the oil filter that prevents the passage of
metal particles and sludge is
A.Element
B.Relief valve
C.Check valve
D.Case
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The component of the oil filter that prevents the passage of metal particles and sludge is Element
29
The characteristic that is enhanced by the use of cylinder
sleeves is
A.Cooling efficiency
B.Resistance to wear
C.Lubrication performance
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The characteristic that is enhanced by the use of cylinder sleeves is Resistance to wear
30.
The material generally used for cylinder sleeves is
A.Aluminium
B.Ceramic
C.Cast iron
D.Fibre reinforced plastic
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
31
The purpose of a thermostat in an engine cooling system is to
A.Prevent the coolant from boiling
B.Allow the engine to warm up quickly
C.Indicate the coolant temperature
D.Pressurise the system to raise the boiling point
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
When the engine is cold, the thermostat is closed and prevents coolant from flowing into the engine and
allows the engine to warm up.
Once the engine has warmed, the thermostat will open and allow coolant to flow and cool the engine when it
starts to get too hot.
This function is vital for optimal engine performance.
32
Inan engine, the temperature of the piston will be more at
the
A.Crown of the piston
B.Skirt of the piston
C.Piston walls
D.Piston rings
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
In an engine, the temperature of the piston will be more at the Crown of the piston
33
The diagram which shows the correct crank positions
corresponding to the opening and closing of the valves, is
known as
A.Indicator diagram
B.Axial force diagram
C.Valve timing diagram
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
A valve timing diagram is a graphical representation of the opening and closing of the intake and exhaust
valve of the engine,
34.
Engine misfiring is likely to result from
A.Spark plug gap too small
B.Spark plug gap to0 wide
C.Vapours lock in the fuel only
D.Incorrect fuel air mixture
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
Engine misfiring is likely to result from Spark plug gap too wide
35.
Aclutch is usually designed to transmit maximum torqu
which is
A.Equal to the maximum engine torque
B.80% of the maximum engine torque
C.150% of the maximum engine torque
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
36.
The effect of vapour locking on the brake performance is that
the
A.Brakes function more effectively
B.Brakes fail completely
C.Brake operation is delayed after depression of the brake pedal
D.Vapour locking has no effect on brake performance
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The effect of vapour locking on the brake performance is that the Brakes fail completely
37
The acid used in automobile battery is
A.Hydrochloric acid
B.Hydrofluoric acid
C.Nitric acid
D.Sulphuric acid
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The acid used in automobile battery is Sulphuric acid
38
Damper in an automobile is used to
A.Absorb the energy
B.Dissipate the energy
C.Release the energy
D.Increase the energy
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
Damper in an automobile is used to Dissipate the energy
39
hydraulic power steering system, the power steering
In a
pump is driven by a
A.Belt driven by camshaft
B.Chain driven by crankshaft
C.Belt driven by drive-shaft
D.Belt driven by crankshaft
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
In a hydraulic power steering system, the power steering pump is driven by a Belt driven by crankshaft
40.
The antiknock property of compression ignition engine fuel
can be improved by adding
A.Tetraethyl lead
B.Trimethyl pentane
C.Amyl nitrate
D.Hexadecane
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
41.
The timing belt is attached to the camshaft pulley and
A.Timing belt drive pulley
B.Distributor
C.Radiator fan pulley
D.Alternator pulley
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The timing belt is attached to the camshaft pulley and Timing belt drive pulley
42.
Incorrect steering axis inclination (S.A.l.) causes
A.Tendency to assume toe-out orientation
B.Generation of a braking effect at tight corners
C.Poor recovery of the steering wheel after making a turn
D.The vehicle to pull to the side of lesser inclination
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Incorrect steering axis inclination (S.A.I.) causes Poor recovery of the steering wheel after making a turn
43.
The ignition coil is used to
A.Step up current
B.Step down current
C.Step up voltage
D.Step down voltage
Answer& Solution Discuss in B0ard Save forLater
Answer & Solution
Answer: 0ption C
Solution:
The ignition coil is used to Step up voltage
44.
Inpetrol engines, during suction stroke,. is drawn in
the cylinder
A.Air and fuel
B.Only fuel
C.Only air
D.None of these
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
In petrol engines, during suction stroke Air and fuel is drawn in the cylinder
45.
In afour cylinder inline engine, the number of firing strokes in
one revolution of the crank is
A.1
B.2
C.3
D.4
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
46.
The main function of the tread pattern on tyre is that
A.The tread grooves pass air between the tyre and road surface, thereby preventing tyre from
overheating
B.The crests between the tread grooves absorb road noise
C.In wet conditions, the tread grooves expel water that is drawn between the tyre and road
surface
D.The tread pattern protects the tyre's inner carcass from small stones and pieces ofglass
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The main function of the tread pattern on tyre is that In wet conditions, the tread grooves expel water that is
drawn between the tyre and road surface
47.
The power actually developed inside the engine cylinder is
called as
Alndicated power
B.Brake power
C.Frictional power
D.None of these
Answer & Solution DisCuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
Indicated Power is defined as the power developed by combustion of fuel inside the engine cylinder
48.
The frequency of flashing of light per minute in a direction
(side turn) indicator is about
A.9
B.90
C.900
D.9000
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The frequency of flashing of light per minute in a direction (side turn) indicator is about 90
49.
air-fuel mixture ignites before the spark takes place at
If the
spark plug, the condition is called
A.Detonation
B.Ignition
C.Pre-ignition
D.Rumble
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called Pre-ignition
50.
The ball joints are used on the tie rod ends, because they
A.Reduce the amount of noise generated
B.Reduce the amount of sliding resistance
C.Can deal with movement of the suspension both vertically and in other directions
D.Improve the force transmission speed
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
51.
The heat transfer from coolant to air in the radiator of an
automobile engine takes place by
A.Radiation only
B.Convention only
C.Convection and radiation
D.Conduction, convection and radiation
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The heat transfer from coolant to air in the radiator of an automobile engine takes place by convection and
radiation
52.
The function of a radiator fan in the cooling system is that
A.It blows air through the radiator when necessary
B.It is turned by wind force as the vehicle moves forward, and its rotation drives the water
pump
C.It cools the engine by blowing air onto the cylinder block
D.It draws heat out of the engine compartment
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The Functions of a Radiator Fan It can push air through the radiator core or pull it through. It must cool the
antifreeze that circulates through the block and head passages and reduces the engine temperature
53
A basic difference between the spark ignition engine and the
Diesel engine is that the
A.Diesel engine compresses air alone instead of an air-fuel mixture
B.Air temperature ignites the fuel in the Diesel engine
C.Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C.
on the compression stroke
D.All of the above
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
A basic difference between the spark ignition engine and the Diesel engine is that the
Diesel engine compresses air alone instead of an air-fuel mixture
-Air temperature ignites the fuel in the Diesel engine
-Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the
compression
54.
The main function of intake manifold is that it
A.Promotes the mixture of air and fuel
B.Reduces intake noise
C.Cools the intake air to a suitable temperature
D.Distributes intake air equally to the cylinders
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a
direct injection engine) to each intake port in the cylinder head(s). Even distribution is important to optimize
the efficiency and performance of the engine.
55.
The clutch is located between the transmission and the
A.Engine
B.Rear axle
C.Propeller shaft
D.Differential
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
56.
Ifa tyre is designated as 175/65 R-14 82-S, then the aspect
ratio for the tyre is
A.175
B.65
C.14
D.82
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
If a tyre is designated as 175/65 R-14 82-5, then the aspect ratio for the tyre is 65
57.
The component that connects the steering rack to the
knuckles is
A.Tie rod
B.Sector gear
C.Pivot
D.Spline
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The component that connects the steering rack to the knuckles is Tie rod
58.
The painting of automobiles is done to
A.Prevent rust from growing on the body
B.Improve its external appearance
C.Retain the characteristics of steel for long
D.All of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The painting of automobiles is done to
Prevent rust from growing on the body
-
Improve its external appearance
-
Retain the characteristics of steel for long
-
59
The advantage of having a tandem master cylinder
arrangement in automobiles is that it
A.Enhances safety by serving two independent lines in a divided line brake circuit
B.Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid
loss
C.Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing
the brakes from dragging on one side
D.Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The advantage of having a tandem master cylinder arrangement in automobiles is that it Enhances safety by
serving two independent lines in a divided line brake circuit
60.
The condition that results in large quantities of CO emission is
A.Insufficient air during combustion
B.Insufficient fuel during combustion
C.Low temperature combustion
D.High temperature combustion
Answer & Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption A
61.
In a four wheel drive (4WD), the numbers of gear boxes are
A.1
B.2
C.3
D.4
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
In a four wheel drive (4WD), the numbers of gear boxes are 2
62.
The condition that results in large quantities of HC emission iss
A.High temperature combustion
B.Incomplete combustion
C.Low temperature combustion
D.High atmospheric temperature combustion
Answer & Solution Discuss in Board Save for Late
Answer & Solution
Answer: 0ption B
Solution:
The condition that results in large quantities of HC emission is incomplete combustion
63
When the piston is at T.D.C., the volume above the piston in
the combustion chamber is the
A.Clearance volume
B.Cylinder volume
C.Exhaust volume
D.None of these
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
When the piston is at T.D.C., the volume above the piston in the combustion chamber is the Clearance
volume
64.
The fuel that detonates easily, is
A.N-heptane
B.Iso-octane
C.Benzene
D.Alcohol
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The fuel that detonates easily is N-heptane
65.
The main function of a resonator is that it
A.Regulates the intake air flow rate
B.Reduces the intake air noise
C.Enhances intake efficiency
D.Regulates the intake air temperature
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
66.
The maximum torque multiplication ratio in a torque
Converter is about
A.2.5
B.10
C.25
D.40
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The maximum torque multiplication ratio in a torque converter is about 2.5
67.
Odometer is an instrument used for measurement of
A.Power
B.Fuel consumption
C.Engine r.p.m.
D.Distance
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
Odometer is an instrument used for measurement of Distance
68.
The lower cylindrical portion of the piston which improves
piston cooling performance is called
A.Piston crown
B.Connecting rod
C.Piston pin boss
D.Piston skirt
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The piston skirt is the cylindrical walls of a piston. During manufacture, the surface of the piston skirt is left
slightly rough which helps retain lubrication.
The piston skirt acts asa guide as the piston goes up and down in the cylinder.
69
Which of the following is not an automobile?
A.Motor cycle
B.Passenger car
C.Aeroplane
D.Truck
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
aeroplane is a powered, fixed-wing aircraft that is propelled forward by thrust from a jet engine, propeller or
rocket engine.
70
The three basic cylinder arrangements for automotive
engines are
A.Flat, radial, and V
B.In a row, in line, and opposed
C.In line, V, and opposed
D.V, double row, and opposed
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
1.
The starter motor is driven by
A.Chain drive
B.Gear drive
C.Flat belt drive
D.V-belt drive
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The function of the starter motor is to start up the combustion engine. An electric motor forms the basis of
the starter motor. When the starter switch is turned on, the starter relay turns on the electric motor. This
motor drives the starter gear ring via the pinion gear
2.
Two speed reverse gear arrangements is generally provided
in case of
A.Passenger cars
B.Matadors
C.Tractors
D.Trucks
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Two speed reverse gear arrangements is generally provided in case of Tractors
3.
The negative terminal post on the top of a battery is
A.Smaller than the positive terminal post
B.Larger than the positive terminal post
C.Of the same size as the positive terminal post
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The negative terminal post on the top of a battery is Smaller than the positive terminal post
4.
Thinner is added to the paint in order to
A.Make pigments and resin mix easily
B.Make paint film hard
C.Optimise its viscosity
D.None of these
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Thinner is added to the paint in order to Optimise its viscosity
5.
The process of supplying the intake air to the engine cylinder
at a pressure greater than the pressure of the surrounding
atmosphere is known as
A.Supercharging
B.Auto ignition
C.Scavenging
D.Detonation
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
6.
The component in the radiator of an automobile that
increases the boiling point of water is
A.Drain plug
B.Water jacket
C.Vacuum valve
D.Pressure cap
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The component in the radiator of an automobile that increases the boiling point of water is Pressure cap
7.
An engine has a clearance volume of 100 cm3 and a swept
volume of 800 cm3. The compression ratio is
A.7:1
B.8:1
C.9 1
D.10:1
Answer & Solution DisCuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
COMPRESSION RATIO = (CLEARANCE VOLUME+SWEPT VOLUME)/(CLEARANCE VOLUME).
100+800/100
9:1.
In a square type engine
A.Geometrical shape is square
B.Diameter and length of piston are same
C.Two cylinders are placed horizontal and two vertical
D.Stroke length and cylinder bore are same
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
In a square type engine Stroke length and cylinder bore are same
9.
The function of a proportioning control valve (PCV) in a brake
system is to
A.Ensure that equal pressure is supplied to the front and rear brakes throughout every
braking operation
B.Reduce the brake fluid pressure when the brakes approach their lockup point
C.Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the
fluid pressure exceeds a predetermined level
D.Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the
fluid pressure exceeds a predetermined level
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The function of a proportioning control valve (PCV) in a brake system is to Cause less brake fluid pressure to
act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level
10
The component that is responsible for converting the rotation
of the steering wheel into lateral motion is the
A.Steering wheel
B.Steering shaft
C.Steering gearbox
D.Tie rod
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option C
11
The two rows of cylinders in a 'V' type engine are generally
arranged at
A.45°
B.60
C.90°
D.130°
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The two rows of cylinders in a 'V type engine are generally arranged at 60
12.
During suction stroke, the inside pressure of cylinder is
A.More than the atmospheric pressure
B.Less than the atmospheric pressure
C.Equal to the atmospheric pressure
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
During suction stroke, the inside pressure of cylinder is Less than the atmospheric pressure
13.
The function of an oil control orifice is that it
A.Returns cylinder head lubricating oil to the oil pan at high speed
B.Turns oil into fine mist for spray lubrication
C.Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder
head mechanism and other purposes
D.Removes impurities from cylinder head lubricating oil
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The function of an oil control orifice is that it Regulates the pressure of engine oil supplied by the oil pump for
the lubrication of cylinder head mechanism and other purposes
14.
The piston compression rings are made of
A.Cast iron
B.Steel
C.Aluminium
D.Bronze
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
The piston compression rings are made of Cast iron
15.
The air gap between the central electrode and ground (or
side) electrode of a spark plug is around
A.0.2 mm
B.0.5 mm
C.1 mm
D.1.5 mm
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
16.
The brake warning light warns the driver of
A.Water in the master cylinder
B.Air in the hydraulic system
C.Failure of the primary or secondary circuit of hydraulic system
D.Power brake failure
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The brake warning light warns the driver of Failure of the primary or secondary circuit of hydraulic system
17.
In a single dry plate clutch, torsional vibrations are absorbed
by
A.Coil springs known as torsional springs
B.Cushion springs
C.Central hub
D.Clutch pedal
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
In a single dry plate clutch, torsional vibrations are absorbed by Coil springs known as torsional springs
18.
The rigid suspension is beneficial when
A.lt is desired to reduce the unsprung mass
B.It is desired to have more flexibility in design
C.It is desired to improve tyre to ground contact characteristics
D.Large changes in load make it necessary to have a large suspension stroke
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The rigid suspension is beneficial when Large changes in load make it necessary to have a large suspension
stroke
19.
The lubrication oil flow in an engine is in the order as
A.Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
B.Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
C.Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
D.Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The lubrication oil flow in an engine is in the order as Oil strainer, oil pump, relief valve, oil filter, cylinder
block, cylinder head and oil pan
20
The cetane rating of Diesel fuel is in the order of
A.25
B.45
C.70
D.90
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
21.
In apetrol engine, the high voltage for spark plug is in the
order of
A.1000 volts
B.2000 volts
C.11 kilovolts
D.22 kilovolts
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
In a petrol engine, the high voltage for spark plug is in the order of 22 kilovolts
22.
The compression ratio for Diesel engines usually lies in the
range of
A.6-10
B.10-15
C.15-25
D.25-40
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The compression ratio for Diesel engines usually lies in the range of 15-25
23
The boiling point of Diesel fuel is in the range of
A.70°C to 100°C
B.100°C to 120°C
C.120°C to 180°C
D.180°C to 360 °C
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The boiling point of Diesel fuel is in the range of 180 C to 360 °C
24.
The caster is called positive when the top of the king pin is
inclined to the
A.Rear of the vehicle
B.Front of the vehicle
C.Left of the vehicle
D.Right of the vehicle
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The caster is called positive when the top of the king pin is inclined to the Rear of the vehicle
25
In case of a Diesel car, the pressure at the end of compression
is of the order of
A.15 bar
B.25 bar
C.35 bar
D.45 bar
Answer & Solution DisCuss in Board Save for Later
Answer & Solution
Answer: 0ption D
26.
The crankcase dilution means
A.Dilution of fuel in the crankcase
B.Dilution of oil by water in the crankcase
C.Dilution of lubrication oil by fuel in the crankcase
D.Dilution of mixture passing through crankcase in two stroke engines
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
Crankcase dilution is a phenomenon of internal combustion engines in which unburned diesel or gasoline
accumulates in the crankcase.
Excessively rich fuel mixture or incomplete combustion allows a certain amount of fuel to pass down
between the pistons and cylinder walls and dilute the engine oil.
27.
The basic purpose of tyres is to
A.Grip the road and provide good traction
B.Substitute for springs
C.Act as brake
D.None of these
Answer&Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The basic purpose of tyres is to Grip the road and provide good traction
28.
The engine oil level should be checked
A.Immediately after the ignition switch is turned off
B.While the engine is running
C.A few minutes after the ignition switch is turned off
D.While the engine is running at high idle speed
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The engine oil level should be checked A few minutes after the ignition switch is turned off
29
The most commonly used supplementary restraint system
(SRS) component is
A.Seat belt
B.Brake
C.Airbag
D.Steering
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The most commonly used supplementary restraint system (SRS) component is Airbag
30
The most effective method of controlling S.I. engine exhaust
emission is by
A.Recirculating exhaust
B.Using catalytic converter
C.Using some additives in the fuel
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
31.
The main function of an exhaust muffler is the
A.Optimization of exhaust efficiency
B.Reduction of exhaust noise
C.Reduction of nitrogen oxide in the exhaust gases
D.Reduction of the exhaust gas volume
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The function of a Muffler or a Silencer in Vehicle is to cool the exhaust gases by expansion through it and to
reduce the noise of outgoing gases.
The exhaust gases must be discharged into the atmosphere with minimum restriction. The restriction in flow
of exhaust gases causes back pressure.
32.
The fuel pump of a programmed fuel injection (PFI) system
operate for two seconds when the ignition is turned to the
start position to
A.Enable the pump's fault diagnosis function to operate
B.Warm up and lubricate the pump
C.Supplies a large amount of fuel and thereby creates a choke effect
D.Pressurise the fuel system before the engine is started
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is
turned to the start position to Pressurise the fuel system before the engine is started
33.
The information provided by the oxygen (O2) sensor to the
feedback control system is about the
A.Air-fuel ratio
B.Air temperature
C.Air flow speed
D.Exhaust gas volume
Answer & Solution Discuss in Board Save for Later
Answer & Solutiopn
Answer: 0ption A
Solution:
The information provided by the oxygen (O:) sensor to the feedback control system is about the Air-fuel ratio
34.
In aforced feed lubrication system, the device used to guard
against excessive oil pressure, is known as
A.Release chamber
B.Balancer
C.Relief valve
D.Stop valve
Answer& Solution Discuss in B0ard Save for Later
Answer 8&
Solution
Answer: 0ption C
Solution:
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as Relief
valve
35.
The fuel pump in the programmed fuel injection (PFI) system
is located
A.Between the fuel filler pipe and fuel tank
B.In the fuel tank
C.On the distributor mounting in the engine compartment
D.On the engine compartment bulkhead
Answer & Solution Discuss in Board Save for Late
Answer & Solution
Answer: 0ption B
36.
The function of positive crankcase ventilation (PCV) system is
that it
A.Mixes fuel with air
B.Promotes combustion by creating a swirling movement in the air-fuel mixture
C.Returns blow by gases from the crankcase to the intake system
D.Feeds blow by gases to the exhaust manifold
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
The function of positive crankcase ventilation (PCV) system is that it returns blow by gases from the
crankcase to the intake system
37.
The basic purpose of a four wheel drive (4WD) System is that
it
A.Delivers improved cornering on dry road surfaces
B.Eliminates the need of snow tyres, tyre chains, etc.
C.Ensures effective transmission of engine torque to all four wheels, even on slippery road
surfaces
D.Ensures that effective braking can be performed, even on slippery surfaces
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
The basic purpose of a four wheel drive (4WD) system is that it Ensures effective transmission of engine
torque to all four wheels, even on slippery road surfaces
38.
The air resistance to a car at 20 kmph is R. The air resistance
at 40 kmph will be
A.R
B.2R
C.4R
D.4R
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
R K.A.V2 when vehicle speed is about 20km/hr.
Where K = Co-efficient of air resistance.
A= Projected area of vehicle.
V Vehicle speed in km/hr.
When vehicle speed is about 4Okm/hr, speed is doubled so we can write V=2V,
Therefore, R = K.A.(2V)2.
R K.A.4V2.
R 4K.A.V2.
R=44R
39
Which part of the automobile tyre is subjected to greatest
flexing action?
A.Bead
B.Side wall
C.Shoulder
D.Tread
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
side wall of tyre is subjected to greatest flexing action
40.
When a gear box has four forward speeds and one reverse
speed, it is said to be a
A.3-speed gear box
B.4-speed gear box
C.5-speed gear box
D.6-speed gear box
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
41.
Which of the following is not a part of the chassis?
A.Wheels
B.Front axle
C.Steering system
D.Seats
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
seats are not the part of chassis
42.
A three way catalytic converter
A.Re-circulates exhaust gasees
B.Burns fuel vapour gases
C.Reduces Nz, H20, and CO2 emission levels
D.Removes CO, HC, and NO2 from the exhaust gases passing through it
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
A three way catalytic converter Removes Co, HC, and NO2 from the exhaust gases passing through it
43.
Cushioning springs in clutch plate reduces
A.Vehicle speed
B.Torsional vibrations
C.Jerky starts
D.None of these
Answer& Solution Discuss in B0ard Save for Later
Answer & Solution
Answer: Option C
Solution:
Cushioning springs in clutch plate reduces jerky starts
44.
The reconditioning process used to give cylinder bore
surfaces a crosshatch pattern, is known as
A.Honing
B.Porous plating
C.Boring
D.Shot peening
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as Honing
45.
The specific gravity of acid in a fully charged battery is
generallyy
A.1.00
B.1.28
C.1.82
D.2.81
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: 0ption B
46.
If thevalve clearances are excessively large, the problem that
Can arise is
A.Overheating of the engine
B.Incomplete valve closure
C.Fouling of spark plug by gasoline
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
If the valve clearances are excessively large, the problem that can arise is Incomplete valve closure
47.
The connecting rod is attached to the piston by the
A.Cap bolt
B.Piston pin
C.Cap roller bearing
D.Rod cap
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The connecting rod is attached to the piston by the piston pin
48.
When the top of the wheel is tilted outward, then it is called
A.Positive camber
B.Negative camber
C.Positive caster
D.Negative caster
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
When the top of the wheel is tilted outward, then it is called Positive camber
49.
Valve overlap is the number of degrees of camshaft rotation
during which
A.Both valves are closed
B.Both valves are open
C.Both 'A' and 'B'
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
Valve overlap is the number of degrees of camshaft rotation during which Both valves are open
50.
The auto ignition in a spark ignition engine means
A.Automatic ignition of the charge at the end of compression
B.Ignition induced by the passage of a spark
C.Ignition of the charge before the passage of flame front
D.Ignition induced to supplement the process of normal combustion
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
51
Which of the following parameter can be adjusted by
modifying the tie rod attachment length?
A.Camber
B.Caster
C.Toe
D.Steering gear ratio
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
Solution:
Toe can be adjusted by modifying the tie rod attachment length
52
The advantage of a tubeless tyre over tube type tyre is
A.Slow air leakage
B.Better fuel efficiency
C.Less chances of running flat
D.All of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The advantage of a tubeless tyre over tube type tyre is
Slow air leakage
Better fuel efficiency
Less chances of running flat
53.
With the increase of battery temperature, the specific gravity
of electrolyte
A.Increases
B.Decreases
C.Remains the same
D.None of these
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
With the increase of battery temperature, the specific gravity of electrolyte Decreases
54.
In a Diesel engine, the fuel is ignited by
A.An electric spark
B.The heat of compression
C.The hot exhaust
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
In a Diesel engine, the fuel is ignited by The heat of compression
55.
The temperature at which tyre inflation pressure should be
checked is
A.20°C
B.25°C
C.35°C
D.Ambient temperature
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
56
In vehicles with tilt steering, the steering column is pivoted in
A.Upper bracket
B.Lower bracket
C.Tilt bracket
D.Steering yoke joint
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
In vehicles with tilt steering, the steering column is pivoted in Lower bracket
57.
The octane number of compressed natural gas (CNG) is
A.90
B.100
C.11
D.120
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption D
Solution:
The octane number of compressed natural gas (CNG) is 120
58.
The advantage of the fuel injection system over the
carburettor system is
A.Improved fuel efficiency
B.Improved emission
C.Improved power output
D.All of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The advantage of the fuel injection system over the carburettor system is
Improved fuel efficiency
Improved emission
Improved power output
59
The main feature of Macpherson strut suspension is that
A.The vertical size of the suspension can be made more compact
B.Non vertical external forces are supported by the suspension arms
C.The unsprung mass in lighter
D.The assembly is slightly more complicated in design
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
The main feature of Macpherson strut suspension is that Non vertical external forces are supported by the
suspension arms
60
An oil filter bypass valve opens when the
A.Engine is cold
B.Engine overheats
C.Oil filter becomes clogged
D.Engine runs at high speed
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option C
61.
An imbalance wheel during vehicle operation
A.Makes large noise when its heavy point hits the road surface
B.Deflects in the vehicle's longitudinal direction
C.Bounces vertically or deflects from side to side (as seen from front or rear)
D.Creates a standing wave
Answer&Solution Discuss in Board Save for Late
Answer & Solution
Answer: Option C
Solution:
An imbalance wheel during vehicle operation Bounces vertically or deflects from side to side (as seen from
front or rear)
62.
How many cells are used ina 12 volt car battery?
A.2
B.4
C.6
D.8
Answer& Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
Solution:
6 cells are used in a 12 volt car battery
63.
Vulcanizing means
A.Heating rubber under pressure
B.Spraying with special paint
C.Melting rubber while stirring it
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option A
Solution:
Vulcanizing means Heating rubber under pressure
64.
Bead wires are made of
A.Steel
B.Copper
C.Zinc
D.Aluminium
Answer& Solution Discuss in B0ard Save for Later
Answer & Solution
Answer: Option A
Solution:
Bead wires are made of Steel
65.
Inwhich of the following conditions, the idle CO percentage
should be measured with the vehicle?
A.Headlights and other electrical devices are switched off
B.Headlights and other electrical devices are switched on
C.Headlights and other lights are switched off
D.Headlights are switched on
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
66.
The materials used for cylinder block are
A.Cast iron and steel
B.Cast iron and aluminium alloy
C.Steel and aluminium alloy
D.Brass and steel
Answer & SolutionDiscuss in Board Save for Later
Answer & Solution
Answer: Option B
Solution:
The materials used for cylinder block are Cast iron and aluminium alloy
67.
The main merit of a multi cylinder type cylinder sleeve is
A.Smaller engine dimensions
B.Better cooling efficiency
C.High rigidity
D.None of these
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
Solution:
The main merit of a multi cylinder type cylinder sleeve is Smaller engine dimensions
68.
Which one of the following statement correctly describes the
construction of a bevel gear type differential?
A.The drive shafts are splined to the differential carrier.
B.The left side gear and the differential carrier rotate in constant unison.
C.The differential carrier houses differential pinion gears and side gears; each pinion gear
meshes with a different side gear.
D.The differential carrier houses differential pinion gears and side gears.
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: Option D
Solution:
The differential carrier houses differential pinion gears and side gears.
69
Which one of the following statements correctly describes the
construction of a planetary gear type differential?
A.The siX planetary pinions rotate in constant mesh with the internal gears.
B.One drive shaft is splined to the central gear and the other to the planetary gear.
C.Each planetary pinion gear meshes with both the central gear and the internal gear.
D.The internal gear is fixed to the planetary gear.
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption B
Solution:
One drive shaft is splined to the central gear and the other to the planetary gear.
70.
Two general types of tyres are
A.Tube type and tubeless
B.Solid and tubeless
C.Air and pneumatic
D.Split rim and drop centre
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption A
1.
The operation of removing trapped air from the hydraulic
braking system is known as
A.Trapping
B.Tapping
C.Bleeding
D.Cleaning
Answer & Solution Discuss in Board Save for Later
Answer 8&
Solution
Answer: 0ption C
Solution:
The operation of removing trapped air from the hydraulic braking system is known as Bleeding
2.
The ease with which petrol vaporizes is called its
A.Oxidation
B.Octane number
C.Volatility
D.Cetane number
Answer & Solution Discuss in Board Save for Later
Answer & Solution
Answer: 0ption C
1. How many cells are used in a 12 volt car battery?
6
8
10
View Answer
2. The power actually developed inside the engine cylinder is called as -
Frictional power
Brake power
Indicated power
None of These
View Answer
Indicated power
3. The battery is an Electrochemical device, which means battery
Uses chemical action to provide electricity
Makes chemicals by mechanical means
Has curved plates instead of flat plates
None of the above
View Answer
Uses chemical action to provide electricity
4. The petrol engines are also known as -
Compression ignition (C.I.) engines
Spark ignition (S.l.) engines
Steam engines
None of these
View Answer
Spark ignition (S.Il.) engines
5. The compression ratio of a petrol engine is nearly
8:1
4:1
15:1
20:1
View Answer
8:1
Download Free Automobile Engineering MCQ PDE
6. The Basic Characteristics of a break fluid is -
Low viscocity
A highly boiling point
Compatibility with rubber and metal parts
All of the above
View Answer
All of the above
7. The Negative Plates of a lead acid battery has-
Lead sulphate (PbSO.)
Lead peroxide (PbO)
Spongy lead (Pb)
Sulphuric acid (H,SO,)
View Answer
Spongy lead (Pb)
8. Petrol that detonates easily is called -
Low octane petrol
High octane petrol
Unleaded petrol
Blended fuel
View Answer
Low octane petrol
9.. Indicates multi-grade oil?
SAE 30
SAE20 W50
API SF
API 50
View Answer
SAE20 W50
10. When turning a corner
The front wheels are turning on different angles
The front wheels are toeing out
The inside front wheels has a greater angle than the outside wheel
All of the above
View Answer
All of the above
Read Best: Autosar Interview Questions
11. The size of the engine intake valve is -
Same as that of exhaust valve
Larger than that of exhaust valve
Smaller than that of exhaust valve
Does not depend upon the size of exhaust valve
View Answer
Smaller than that of exhaust valve
12. On modern four stroke engines the exhaust valve opens just
Before TDc
Before BDC
Before TDC
After BDC
View Answer
Before BDC
13. At which stroke the fuel is injected in the Cl engine?
Compression stroke
Expansion stroke
Exhaust stroke
Suction stroke
View Answer
Compression stroke
14. What is the spray cone angle in the Pintle nozzle?
15
60
25
45
View Answer
60
15. What is the coefficient of fluctuation of speed?
The ratio of the maximum fluctuation of energy to the mean speed
The ratio of the maximum fluctuation of speed to the mean speed
The ratio of the minimum fluctuation of energy to the mean speed
The ratio of the work done per cycle to the mean speed
View Answer
The ratio of the maximum fluctuation of speed to the mean speed
Download Free: Autosar Interview Questions PDE
16. Which method of scavenging is used in two-wheelers without deflector
type piston?
Reverse flow scavenging
Cross scavenging
Uniform scavenging
Loop scavenging
View Answer
Cross scavenging
17. are cast in crankcase to give extra strength and to support
camshaft bearings
oil filter
rocker arm
rims
manifolds
View Answer
rims
18. Cylinder block is usually made from
chromium
nickel
steel sleeves
grey cast iron
View Answer
grey castiron
19. Which of the following is advantage for aluminium alloy cylinder block
Over grey cast iron?
machinability
density
co-efficient of thermal expansion
thermal conductivity
View Answer
density
20. The main advantage of using aluminium alloy for cylinder head is-
high thermal conductivity
lightness in weight
less corrosion rate
COst
View Answer
high thermal conductivity
1. In commercial vehicle layouts engine is located forward, rear or under
floor mainly to
a. Better utilization of space
b. Increase fuel economy
c. Better weight distribution
d. Reduce the weight of chassis
Ans: c
2. The type of air cycle used in diesel engine is called
a. Otto cycle
b. Carnot cycle
c. Diesel cycle
d. Rankine cycle
Ans: c
3. During suction stroke the pressure inside the cylinder is
a. Equal to atmospheric pressure
b. Above atmospheric pressure
c. Above or below atmospheric pressure
d. Below atmospheric pressure
Ans: d
4. During compression stroke the air is compressed according to
a. Isothermal process
b. Hyperbolic process
c. Adiabatic process
d. Constant pressure process
Ans: c
5. The heat is added in the cycle at
a. Constant pressure
b. Constant volume
c. Approximately constant pressure and constant volume
Ans: c
6. The fuel injected when pressure in the cylinder reaches the point .. **°°
on the curve
l. 1
b. 2
C. 3
d. 4
Ans: c
7.The erankcase scavenging the the crankcase or underside of the piston
acts as
a. An air compressor
b. A blower
c. A ventilator
d. A breather
Ans: a
8. The two-stroke engine has valve ports in the
a. Pistons
b. Cylinder walls
c. Piston rings
Ans: b
9. The temperature of the piston will be more at
a. The piston walls
b. The crown of the piston
c. The skirt of the piston
d. The piston pin
Ans: b
10. Connecting rods are generally of the following from
a. Forged round section steel
b. Cast steel triangular section
c. Forged square section steel
d. Forged I section steel
Ans: d
11. For petrol engines the nominal compression ratio will vary between
a. 1 to 2:1
b. 18 to 21:1
C. 1 to 5:1
d. 7.5 to 8.5:1
Ans: d
12. For diesel engines the nominal compression ratio is from
a. 17 to 21:1
b. 7.5 to 8.5:1
C. 30 to 40:1
d. 1 to 5:1
Ans: a
13. One of the major causes of FHP in an engine is
a. High speed
b. High volumetric efficiency
e. Piston-ring frictionn
Ans: c
14. Engine torque is highest at
a. Low speed
b. Intermediate speed
c. High speed
Ans: b
15. The maximum pressure of air fuel mixtuure at the end of compression
in petrol engines varies from
a. 10-30 Kg/cm2 b. 30-100 Kg/cm2
c. 6-10 Kg/cm2
d. 100-1000 Kg/cm2
Ans: a
16. When we lift a 10 kg weight, 3 metre we would be doing
a. 300 m kg of work
b. 3 m kg of work
C.30 m kg of work
Ans: c
17. The characteristie of an object which makes it resist any tendency to
change its direction of motion is
called
a. Inertia
b. Power
c. Internal energy
Ans: a
18. The maximum pressure of air at the end of compression in diesel
engines is about
a. 10 Kg/cm2
b. 100 Kg/cm2
C. 300 Kg/cm2
d. 30 Kg/cm2
Ans: d
19. As the number of cylinders in multi cylinder engines increases the
power to weight ratio ..
a. Remains the same
b. Increases
c. Becomes zero
d. Decreases
Ans: b
20. The type of friction generally present in an automotive engine is
a. Viscous friction
b. Greasy friction
c. Dry friction
Ans: a
21. The fit of the piston to the eylinder is measured at the
a. Piston skirt
b. Piston head
c. Point of minimum diameter
Ans: b
22. Vibration damper ....
a. controls the torsional vibrations
b. drives the pulley
C. dampens the engine speed
d. reduces the speed of the flywheel
Ans: a
23. In a six cylinder engine there is balance of
a. Primary forces only
b. Secondary forces only
C. Both primary and secondary forces
Ans: c
24. If the connecting rod longer, the side thrust of the piston is
a. Increased
b. Constant
c. Decreased
Ans: c
25. In general the design of the current regulator is such that its main
actuating winding carries full
a. Generator voltage
b. Generator output
c. Field current
d. Battery voltage
Ans: b
26. Immediately after ignition, combustion chamber temperatures may
reach a value of
a. 15000DC
b. 55000C
C. 25000C
d. 75000bC
Ans: a
27. The compression ratio in a diesel engine is as high as
a. 25:1
b. 20:1
C. 10:1
d. 5
Ans: b
28. The temperature ofthe compressed air should be. . of the fuel
a. Below the flash point
b. Above the flash point
c. Above the fire point
d. Between the fire and flash point
Ans: c
29. The compression pressure in diesel engine is around
a. 30 Kg/cm2
b. 10 Kg/em2
C. 20 Kg/cm2
d. 40 Kg/cm2
Ans: a
30. The combustion process in a diesel engine is
a. Constant pressure process
b. Isothermal process
c. Constant volume process
d. Adiabatic process
Ans: a
31. Which type of valve arrangements require the use of rocket arms?
a. H- head
b. T- head
c. I- head
d. L- head
Ans: c
32. The conventional mechanical type fuel pump develops. *****
pressure
a. o.15 Kg/cm2
b. 1.0 Kg/cm2
c. 0.5 Kg/cm2
d. o.3 Kg/cm2
Ans: b
33. As compression ratio in an engine goes up, the octane requirements of
the fuel1
a. Goes down
b. Goes up
c. Stay about the same
Ans: b
34. The metering rod is designed to vary the size of which jets
a. High speed jets
b. Accelerating jets
c. Float level jets
d. Idle jets
Ans: a
35. The turbulence in diesel engines ensures to
a. Increase the volumetric efficiency
b. Increase the compression ratio
c. Bring the fuel quickly in contact with the air
d. Increase the specific fuel consumption
Ans: e
36. If compression ratio is increased
a. Thermal efficiency will be increased
b. Volumetric efficiency will be increased
c. Air standard efficiency will be decreased
d. Air standard efficiency will be increased
Ans: d
37. In V type engines the included angle between two banks of cylinders is
a. 450
b. 600
C. 1300
d. 900
Ans: d
38. The duration of the fuel injection at full load in a diesel engine running
at 1800 rpm when it has 200 of
crank travel is
a. 1/600 sec
b. 1/640 sec
C. 1/540 sec
d. 1/530 sec
Ans: c
39. Comparing a Four wheel drive with Two wheel drive system either at
front or rear and assuming an equal division of weight between the two
axes
a. From the point of view of traction front wheel drive is better than rear wheel drive
b. Front wheel and rear wheel drive are equal
c. Four wheel drive can always give more traction than either rear or front wheel drive
d. Four wheel drive can utilize all the weight of the vehicle only at a particular road
friction
Ans: c
40. The range of gear ratios in a vehicle depends on
a. The ratio of engine h.p to laden weight of vehicle
b. Max. engine torque /wt. of vehicle
c. Only on the laden weight of vehicle
d. The power to weight ratio of engine
Ans: b
41. Most of the mopeds in India have capacity of
a. 10 cc
b. 250 cc
C. 50 cc
d. 175 Cc
e. 150 cc
Ans: c
42. Which motor cycle has maximum power rating
a. Rajdoot
b. Jawa
c. Yamaha
d. Bullet
Ans: c
43. During a collision the front parts of an automobile are subjected to a
deceleration of about ... at about 50 mphr
a. 100g
b. 1000g
C. 1g
d. 10g
Ans: c
44. Piston displacement is calculated from the
a. Cylinder diameter and length
b. Piston length and diameter
c. Bore and stroke
Ans: e
45. The power used in overcoming friction in the engine is called
a. FHP
b. BHP
C.IHP
Ans: a
46. During combustion the pressure in the cylinder may increase to as
much as
a. 50 Kg/cm2
b. 400 Kg/cm2
C. 10 Kg/cm2
Ans: a
47. The size of intake valve is
a. Smaller than that of the exhaust valve
b. Equal to that of the exhaust valve
c. Larger than that of the exhaust valve
d. Not depending upon the size of exhaust valve
Ans: c
48. A negative loop in the P.V diagram of an I.C engine is due to
a. Pre ignition in the engine
b. Suction of air for engine
c. Pre opening of the exhaust valve
d. High pressure in the cylinder
Ans: b
49. Two stoke engine is preferred for small vehicles because
a. Fuel consumption is low
b. Shock and vibrations are less
c. Its size is small
d. It is easy to control
Ans: c
50. Knowing the speed at which an engine is running and the torque it is
developing, we can caleulate
a. FHP
b. IHP
c. BHP
Ans: a
1. The radiator tubes are manufactured by using
a. Cast iron tubes
b. Aluminum tubes
c. Brass tubes
d.Steel tubes
Ans: c
2. If we know the engine speed, bore, stroke, number of cylinders and
m.e.p in the cylinders, we can caleulate
a. FHP
b. IHP
C. BHP
Ans: b
3. Knowing the IHP and FHP of an engine, we can calculate
a. Compression ratio
b. rpm
C. SAF
d. BHP
Ans: d
4. Which one of the following is nota trade name of tractor in India
a. Kirloskar
b. Escort
c. Standard
d. HMT
Ans: c
5. The ratio between the power output of an engine and the energy in the
fuel burned to produce that power is called1
a. Volumetrie efficiency
b. Thermal efficiency
c. Mechanical efficiency
Ans: b
6. The air volume in the cylinder with the piston at B.D.C divided by the
clearance volume is called
a. Compression ratio
b. Piston displacement
c. Cylinder ratio
Ans: a
7. The power used in overcoming friction in the engine is called
a. BHP
b. IHP
c. FHP
Ans: c
8. The average pressure during the power stroke minus the average
pressure during the intake, compression and exhaust strokes is called
a. IHP
b. Compression ratio
c. BHP
d. m.e.p
Ans: d
9. IHP minus FHP equals
a. BHP
b. SAF HP
C. m.e.pP
Ans: a
10. Engine torque is highest at
a. High speed
b. Low speed
C. Intermediate speed
Ans: c
11. BHP divided by IHP is
a. Thermal efficiency
b. Mechanical efficiency
c. Volumetric efficiency
Ans: b
12. The percentage of the energy in the petrol burnt in the engine which
is actually utilized in propeling the car is as little as
a. 25%
b. 60%
.
b. 35%
15%
Ans: a
13. In the diesel engine, the compression ratio is as high as
a. 10:1
b. 15:1
. 5:1
Ans: b
14. The device for smoothing out the power impulses from the engine is
called the
a. Flywheel
b. Camshaft
c. Crankshaft
d. Clutch
Ans: a
15. The amount of air fuel mixture taken in by the engine on the suction
stroke is a measure of the engine's
a. Compression ratio
b. Volumetric efficiency
c. Clearance volume
Ans: b
16. The size of an engine cylinder is referred to in terms of its
a. Diameter and bore
b. Bore and length
c. Bore and stroke
Ans: c
17. In an operating engine, the hottest part of the piston is the
a. Head
b. Ring grooves
c. Skirt
d. Pin bosses
Ans: a
18. In normal operation the part of the exhaust valve that gets the hottest
is
a. Face
b. Middle of Stem
c. Centre of head
d. Edge of margin
Ans: c
19. The power developed inside the engine cylinder is called
a. IHP
b. FHP
c. BHP
Ans: a
20. The ratio of the cylinder volume at BDC and the clearance volume is
called
a. Clearance ratio
b. Volumetrie ratio
c. Compression ratio
Ans: c
21. As a rule when comparing the front and rear wheel cylinder pistons,
it will be found that the pistons in the front wheel cylinders are
a. The same size
b. Larger in diameter
c. Smaller in diameter
Ans: b
22. Twisting and untwisting of the crankshaft is called
a. Torsional vibration
b. Power impulsion
c. Torsional balance
Ans: a
23. The rotating effect of the connecting rod on the connecting rod
bearing produces
a. Pressure load
b. Inertia load
c. Centrifugal load
Ans: c
24. Important bearing characteristics include
a. Embeddability, compression and fatigue
b. Exbeddability, conformability and fatigue resistance
Ans: b
25. In the engine there must be relative motion between the piston and
the connecting rod
a. Atmospheric pressure, inertia and torsional vibration
b. Centrifugal force, inertia and combustion pressure
c. Inertia, engine speed and centrifugal force
Ans: b
26. Two of the three connecting rod bearing loads that increase as engine
speeds increase are
a. Centrifugal and inertia loads
b. Torsional and pressure loadds
C. Pressure and inertia loads
d. Pressure and centrifugal loads
Ans: a
27. When different forces act at angles on connecting rod bearing, the
combining of these forces produces a
a. Remaining force
b. Canceling force
c. Resultant force
Ans: c
28. The active material in a charged negative plate is
a. Lead sulphate
b. Lead peroxide
c. Lead metal
d. Lead per chloride
Ans: c
29. The tree general types of friction bearings are
a. Journal, ball and roller
b. Journal, guide and thrust
c. Journal, shaft and thrust
Ans: b
30. Petrol and Gasoline is called a hydrocarbon because it consists
essentially of
a. Carbon and Hydrogen
b. Oxygen and Hydrogen
c. Carbon and Oxygen
Ans: a
31. Almost all bearing used in automotive engines are
a. Guide bearings
b. Friction bearings
c. Antifriction bearings
Ans: b
32. The brake shoes are curved to conform to the inner diameter of the
a. Tyre
b. Wheel
c. Pedal
d. Brake drum
Ans: d
33. It is cheaper if we use gaskets of
a. Rubber asbestos type
b. Copper asbestos type
c. Steel asbestos type
Ans: a
34. With an increase in temperature the resistance of carbon is
a. Unchanged
b. Decreased
C. Increased
Ans: c
35. When petrol burns completely, two of the compounds that are
formed are
a. Carbon dioxide and water
b. Water and oxygen
c. Hydrocarbon and oxygen
Ans: a
36. Due to heat of combustion, with increase in temperature the
molecules
a. Move slower
b. Vaporize
C. Move faster
Ans: c
37. When air is heated, it
a. Contracts and becomes heavier
b. Expands and becomes heavier
c. Expands and becomes lighter
Ans: c
38. Changing position of an object against an opposing force is called
a. Power
b. Torque
c. Energyy
d. Work
Ans: d
39. A liquid that boils at a relatively high temperature is said to have
a. A low viscosity
b. A high viscosity
C. A high volatility
d. A low volatility
Ans: d
40. The ease with which a liquid changes to a vapour is called its
a. Vapourability
b. Boiling point
c. Viscosity
d. Volatility
Ans: d
41. The pump part that rotates and causes water circulation between the
radiator and engine is called
a. Impeller
b. Fan
c. Bypass
Ans: a
42. The bearing having the least friction is the
a. Sleeve bearing
b. Antifriction bearing
c. Friction bearing
Ans: b
43. Conform ability of an engine bearing is
a. Ability of a bearing to withstand the wear and tear
b. Resistivity to corrosion
c. Ability of the bearing to adjust itself to variations in shaft alignment and journal
shape
d. Ability of a bearing to permit foreign particles to embed in it
Ans: c
44. The most commonly used material for tyre tubes is
a. Butyl
b. Natural rubber
C. Butane
Ans: a
..... plates of battery
45. When the cell are made larger in size, we get
increased
a. Current
b. Voltage
c. Cell resistance
Ans: a
46. When preparing electrolyte, it is important to remember that
a. Acid and water should be poured together
b. Water should be poured into acid
c. Acid should be poured into water
Ans: c
47. Aluminium alloy pistons are preferred because
a. They are good absorbers of shock
b. They are having less weight
c. They have good water resistance
d. They are very strong in tension
Ans: b
48. The material used for the piston of modern passenger cars are
a. Brass pistons
b. Cast iron pistons
C. Aluminiun alloy pistons
d. Steel pistons
Ans: e
49. Piston compression rings are manufactured by
a. Aluminium
b. Cast iron
C. Steel
d. Bronze
Ans: b
50. Gudgeon pins or piston pins are made by
a. Piston material itself
b. Cork
c. Cast iron
d. Hardened and ground steel
Ans: d
1. The brake pipe in hydraulic brakes is made up of
a. PVC
b. Steel
c. Rubber
d. Copper
Ans: b
2. The ease with which a liquid vapourizes is called its
a. Volatility
b. Octane rating
c. Vapourability
Ans: a
3. As the battery is discharged, the active materials in both negative and1
positive plates are changed to
a. Spongy lead
b. Sulphuric acid
c. Lead oxide
d. Lead sulphate
Ans: d
4. The pipes used in diesel engines from pump to nozzle is made up of
a. PVC
b. Rubber
c. Steel
d. Copper
Ans: c
5.Two types of antifreeze are
a. Iso octane and ethylene glycol
b. Aleohol base and ethylene glyeol
c. Ethylene glycol and propylene glycol
Ans: b
6. The substance added to the oil which helps to keep the engine clean is
called
a. Grease
b. Thickening agent
c. Soap
d. Detergent
Ans: d
7. One advantage of using an exhaust valve as insert is that the ring
a. Withstands high exhaust gas temperature better
b. Is more easily machined
c. Wears in more quickly
Ans: a
8. The erankshafts are usually forged to get
a. Minimum friction effects
b. A good mechanical design
c. Good grain structure
d. Improved corrosion structure
Ans: b
9. The number of parallel paths in a lap winding of the armature ofa DC
generator is equal to
a. Half the number of poles
b. Number of poles
C. Two
Ans: b
10. The unsprung mass in a vehicle system is mainly composed of
a. The frame assembly
b. Gear box and propeller shaft
c. Axle and the parts attached to it
d. Engine and associated parts
Ans: c
11. Parts of the shock absorber include
a. Valves
b. Coupler
c. Valve springs
d. Pistons
Ans: a
12. The automobile chassis consists of the engine, frame, power train,
wheels, steering and ........
a. The doors
b. Luggage boot
c. Wind shield
d. Braking system
Ans: d
13. The frame provides supPport for the engine body, power train
members and.
a. Wheels
b. Jack
c. Road
Ans: a
14. The engine is usually supported by the frame
a. Four or five
b. One or two
c. Three or four
d. One or two
Ans: c
15. The central part of the axle beam is offset downwards to
a. Give improved resistance to end thrusts during cornering
b. Give better bending strength
c. Give improved torsional strength during brake application
d. Clear the engine sump and lower vehicle centre of gravity
Ans: d
a
16. X- member of car frame ensures improved
a. Resistance to side force due to transverse wind load
b. Bending strength of side members
c. Resistance to vertical shock loads acting simultaneously on both front wheels
d. Resistance of weaving and torsional strength of front end of frame
Ans: a
17. The purpose of the shock absorbers is to
a. Strengthen framne
b. Damp spring oscillations
c. Improve rigidity of spring mountings
Ans: b
18. The rear end suspension arrangement in which rear end torque is
absorbed by the spring is called the
a. Torque tube drive
b. Hooks drive
c. Differential drive
d. Hotchkiss drive
Ans: d
19. On rebound, in the direct acting shock absorber, fluid flows out of the
upper part of the cylinder and also ..
a. Out of the dust shield
b. Out of the reservoir
c. Into the reservoir
d. Into the dust shield
Ans: b
20. The weight or pressure required to deflect a spring in mm is called
the spring
a. Weight
b. Deflection
c. Rate
d. Rebound
Ans: c
21. Leaf spring for vehicles are nipped to
a. To vary the effective length of the spring
b. To increase the interleaf friction
C. Improve the load carrying capacity of spring
d. Ensure that all leaves are uniformly stressed during loading
Ans: d
22. The device that permits variation in the distance between the spring eyes of a leaf
spring as the spring
flexes is called
a. Spring shackle
b. SpringU- bolt
c. Spring hanger
d. Spring leaf
Ans: a
23. When the direct acting shock absorber is compressed or telescoped fluid passes
through the piston orifices into the upper part of the cylinder and also
a. Into the dust shield
b. Out of the dust shield
c. Into the reservoir
d. Out of the reservoir
Ans: c
24. The clips placed at intervals along some leaf spring to prevent spring leaf
separation on rebound, are
called
a. Rebound clips
b. eparation clips
c. Interval clips
d. Relief clips
Ans: a
25. In a vehicle with torque tube drive, the rear suspension spring
a. Takes up driving thrust and torque reaction
b. Supports load and takes up end thrust
c. Takes up braking thrust and torque reaction
d. Takes up end thrust and torque reaction
Ans: b
Automobile Engineering Interview Questions and Answers for Competitive
Exams
26. With a leaf spring type of suspension, interference between steering and
suspension system can be
reduced to minimum when
a. Front end of the spring is pin joined and the rear end is shackled
b. Front end of the spring is shackled and rear end is pin jointed
c. Both end of the spring are shackled
d. Both ends of the springs are pin jointed
Ans: b
27. The laminated spring, which is in common use, is of the type
a. Full elliptie
b. Semi elliptic
c. One quarter elliptic
d. Three quarter elliptic
Ans: b
28. A double acting shock absorber usually has
a. Unequal pressure acting on either sides
b. Equal pressure on either side
c. Pressure acting only on one side
Ans: a
29. Hotchkiss drive is the name associated with
a. A type of automatic transmission
b. The kind of drive for independent suspension axles
c. A means of taking up torque and thrust by leaf springs
d. A type of gear box
Ans: b
30. The part of the vehicle holds the passengers and the cargo to be transported is
known as
a. Hull
b. Chassis
c. Cabin
d. Sedan
Ans: a
31. The power train includes the clutch, propeller shaft, differential and ......*********
a. Steering gear
b. Front axles
c. Chassis
d. Transmission
Ans: d
32. In gear systems, speed reduction means torque
a. Stabilization
b. Increase
c. Reduction
Ans: b
33. Clutch slippage while clutch is engaged is particularly noticeable
a. When starting the engine
b. During acceleration
c. During idle
1. At low speed
Ans: b
34. Clutch chattering or grabbing is noticeable
a. At low speed
b. When engaging the clutch
C. When accelerating
d. During idle
Ans: d
35. Clutch noises are usually most noticeable when the engine is
a. Being started
b. Decelerating
c. Idling
d. Accelerating
Ans: c
36. Synchronizing devices are designed to prevent gear clash when shitfting into
a. First and second
b. Second and high
c. First and reverse
Ans: b
37. The overdrive is located between the
a. Transmission and the propeller shaft
b. Planetary gears and clutch
c. Transmission and clutch
Ans: b
38. The sun gear in the planetary gear system meshes with the
a. Pinion cage
b. Ring gear
c. Clutch gear
d. Planet pinions
Ans: d
39. Pressing down on clutch pedal causes the release levers to move the pressure
plate away from
a. Friction dise
b. Clutch cover
c. Pressure plate baffle
d. Throw out bearing
Ans: a
40. In coil spring type of clutch the cover is separated by
a. Removing three screws or nuts
b. Unhooking three retainer springs
c. Removing wire coil springs
d. Detaching three lever spring
Ans: a
41. In the high gear in the transmission, main shaft turns at the same speed as the
a. Idler shaft
b. Counter shaft
c. Clutch shaft
Ans: c
42. The purpose of the fluid coupling is to act as a
a. Automatie gear changer
b. Flexible power transmitting coupling
c. Synchronizing device
Ans: b
43. In the fluid coupling oil passes from the driving to the
a. Gear
b. Coupling
c. Vanes
d. Driven member
Ans: d
44. Braking is produced by the frictional effect between the brake drum and the
a. Wheel studs
b. Wheel rim
c. Brake shoes
d. Wheel eylinder pistons
Ans: c
45. The drive pinion in the over running clutch is moved into mesh for cranking
action by
a. A shaft lever
b. Sleeve turning in pinion
c. Pinion inertia
Ans: c
46. The function of a torque converter or fluid converter is similar to that ofa
a. Gear box
b. Clutch
c. Shock absorber
d. Torsion box
Ans: a
47. In the transmission system, the provision of slip joints allows a change in the
a. Angle of drive
b. Length of shaft
c.Speed of rotation
Ans: b
48. In the torque converter, oil leaving the turbine is changed into a helping
direction by curved
a. Pump vanes
b. Stator vanes
c. Turbine vanes
Ans: b
49. In a fluid coupling the greater the difference between the speeds of the driving
and the driven member
a. Higher the coupling efficiency
b. The lower the turbulence
c. The lower the coupling efficiency
Ans: c
50. The ratio between the speed of the camshaft and the speed of the crankshaft is
a. 1:1
b. 1:4
C. 1:2
d. 1:1/4
Ans: b
1. The free wheeling mechanism contains
a. A planetary gear
b. A transmission
C. An over running clutch
d. A propeller shaft
Ans: c
2. For each crankshaft revolution, the cam shaft revolves
a. one half-turn
b. one turn
c. two turns
d. four turns
Ans: a
3. The overdrive is located between
a. Gear box and clutch
b. Gear box and propeller shaft
c. Planetary gears and clutch
Ans: b
4. The synchronizing device used in the transmission uses
a. Cone braking surfaces
b. Flat braking surfaces
c. Synchronizing pins
Ans: a
5.The second movement of the gear shift lever produces
a. The correct gears to mesh
b. The movement of the drive gear
c. Release of clutch
Ans: a
6. There are two separate movements of the gear shift lever for changing the gears.
The first movement selects
a. The shaft to be moved
b. The shaft pedal to be moved
c. Shifter fork which operates gear assembly to be moved
Ans: c
7. The standard transmission has
a. One shifter fork
b. Two shifter forks
c. Three shifter forks
d. Four shifter forks
Ans: c
8. The conventional motor car has
a. Two forward speeds
b. Three forward speeds
c. Four forward speeds
Ans: c
9. In the transmission, the reverse idler gear always mesh with
a. Counter shaft drive gear
b. Counter shaft low gear
c. Main shaft reverse gear
d. Counter shaft reverse gear
Ans: d
10. In transmission reduction of speed is always used to obtain
a. Reduction of torque
b. Constant torque to drive the wheels
c. Increase of torque
Ans: c
11. The device that produces different gear ratios in the power train is called
a. Differential
b. Transmission
c. Speed Changer
Ans: b
12. In the automobile, the power train carries the engine power from the engine to
the rear wheels. The power
train includes the clutch propeller shaft, differential and
a. Front axis
b. Steering gear
c. Gear box
d. Chassis
Ans: c
13. In the coil spring type of clutch when the pressure plate and cover are separated,
the spring pressure must
be held by
a. Hand
b. An arbor press
C. A lever
d. A heavy weight
Ans: b
14. Parts of the clutch that should not be cleaned in solvent include the
a. Friction dise and throw out bearing
b. Friction disc cover
C. Throw out bearing and springs
d. Release levers and springs
Ans: a
15. On diaphragm spring clutch, pressing down on the clutch pedal moves throw out
bearing in against the
a. Release levers
b. Diaphragm
c. Pressure plate
d. Friction dise
Ans: a
16. As a general rule in facings on the friction disc are worn down to the rivet heads
a. Rivets should be
replaced
b. The friction disc should be replaced
c. The clutch should be replaced
d. The linkage should be adjusted
Ans: b
17. The front end of the clutch shaft is supported in a pilot bearing in the
a. Throw out bearing
b. Friction disc
c. Crankshaft
d. Transmission
Ans: c
18. The three forward speed and the reverse transmission consists of three shafts
and
a. Three gears
b. Five gears
C. Eight gears
d. Ten gears
Ans: c
19. Synchromesh devices in the transmission synchronize the gears about to be
a. Meshed
b. De-meshed
c. Stopped
Ans: a
20. In the transmission the counter shaft drive gear is meshed with a gear on the
a. Output shaft
b. Main shaft
c. Clutch shaft
Ans: b
21. The fluid coupling is most efficient as drive ratio approaching to
a. 1:1
b. 2:1
C. 1:5:1
d. 1:3
Ans: a
22. In the fluid coupling speed reduction means
a. torque reduction
b. torque increase
C. power increase
Ans: a
23. When the clutch is engaged, spring pressure clamps the friction dise between the
pressure plate and the
a. Flywheel
b. Differential
c. Reaction plate
d. Clutch pedal
Ans: a
24. The free travel of the medal, or pedal lash is the amount of travel the pedal has
before the throw out
bearing comes up against the
a. Release levers
b. Flywheel
c. Floor board
d. Stop
Ans: a
25. The automobile transmission is removed from the car by taking it out
a. From under car
b. Through driving compartment
c. Through engine compartment
Ans: a
Automobile Engineering Objective Type Interview Questions Pdf| Preparation
for GATE Exams
26. Overdrive is provided in the transmission of a vehicle to
a. Reach higher road speeds
b. improved fuel consumption
C. achieve better acceleration
d. carry more load
Ans: b
27. The number of gear ratios in a vehicle
a. Is more with high powered vehicle
b. Is less with high powered cars
c. Is more with diesel engine heavy vehicles
d. is more with petrol engine typical American Car
Ans: a
28. In the process of gear shifting in a layshaft type of gearbox
a. An upchange say third to Top Gear requires speeding up of lay shaft
b. An up change requires slowing down the layshaft
c. An upchange or down change is not accompanied by changes in layshaft speed
d. Gear shifting involves change of speed only in down shifts
Ans: b
29. A fluid coupling
a. Acts like flywheel and replaces it since as it is known also by the name fluid wheel
b. It takes the place of friction clutch and replaces it completely in synchromesh
transmission systems
c. It replaces the friction clutch and the Gearbox also
d. Does the function of a clutch automatically, but cannot be used for shifting
transmission to etfect Gear changes
Ans: d
30. The main advantage of a fluid coupling is
a. In its low torque capacity at low speedds
b. Steady state torque characteristic
c. Due to its ability to slip
d. Due to its ability to function fluid medium
Ans: c
31. The hydrodynamic torque converter
a. Gives a continuous variation of torque with increase of output speed
b. Enables to get the max. h.p continuously
c. Gives a speed variation without torque variation
d. Maintains a high efficiency throughout the operating speed range
Ans: a
32. An automatic transmission works on the principle of
a. Centrifugal device making up changes proportional to road speed
b. Centrifugal device connected to crankshaft making up changes prop. to engine
speed
c. Makes changes depending on throttle position in conjunction with road speed
governor
d. Makes gear changes at equal intervals or set road speeds
Ans: c
33. The coil springs are located in between the pressure plate and the
a. Clutch cover
b. Disc assembly
c. Pressure plate baffle
d. Flywheel
Ans: a
34. The clutch cover is bolted to the
a. Friction dise
b. Flywheel
c. Car frame
d. Engine block
Ans: b
35. The friction disc is positioned between the flywheel and the
a. Engine
b. Crankshaft
c. Pressure plate
Ans: c
36. There is a double faced friction disc splined to a shaft in the
a. Transmission
b. Differential
c. Engine
d. Clutch
Ans: d
37. To prevent distortion on re-installation on the clutch cover attaching bolts should
be tightened
a. One at a time
b. Evenly
c. Until springs begin to compress
d. Until springs are expanded
Ans: b
38. The power train transmits power from the engine to the
a. Crank shaft
b. Rear wheels
c. Front wheels
d. Steering gear
Ans: b
39. The clutch pressure plate is mounted on the
a. Flywheel
b. Clutch cover
c. Friction disc
d. Crankshaft
Ans: b
40. The release levers in a typical clutch pivot on
a. Springgs
b. Levers
c. Threaded levers
d. Pins
Ans: d
41. If two meshing gears have 4:1 gear ratio and the smaller gear has 12 teeth, the
large gear will have
a. 12 teeth
b. 24 teeth
C. 36 teeth
d. 48 teeth
Ans: d
42. The two meshed gears have a gear ratio of 3:1. Every time the larger gear turns
once the small gear will
be to turn
a. 1/3 timne
b. one
c. three times
Ans: c
43. In the diaphragm clutch inward movement of the throw out bearing causes the
diaphragm spring to
a. Dish inward
b. Expand
c. Contract
Ans: a
44. The fluid coupling has maximum efficiency when driving and driven members
are turning at
a. High speed
b. Low speed
c. Different speed
d. About the same speed
Ans: a
45. The purpose of the guide ring in the fluid coupling is to reduce oil
a. Movement between the members
b. Turbulence
c. Level in coupling
Ans: b
46. Synchronizing is designed to prevent gear clash when shifting into
a. First and reverse
b. First and second
c. Second and high
Ans: c
47. When shifting into low, a gear on the transmission main shaft is moved in to
mesh with the
a. Counter shaft low gear
b. Counter shaft idler
c. Clutch gear
d. Output gear
Ans: a
48. Clutch noises are usually most noticeable when the engine is
a. Accelerating
b. Decelerating
c. Idling
d. Being started
Ans: c
49. Clashing of gears when shifting into high could result from
a. Engine misalignment
b. Drive key sheared
c. A defective Synchronizer
Ans: c
50. Transmission noise in neutral could result from
a. Worn gears
b. Loose propeller shaft
c. Misadjusted gear linkage
Ans: a
1. The purpose of the fluid coupling is to act as a
a. Synchronizing device
b. Automatie gear changer
c. Flexible power-transmitting coupling
Ans: c
2. The distance between adjacent meshing teeth of mating gears is called
a. Clearance
b. Back lash
c. Flank
Ans: b
3. In the fluid coupling, speed reduction means torque reduction. But in the torque
converter, speed reduction means
a. Torque increase
b. Torque loss
C. Power increase
Ans: a
4. The fluid coupling consists essentially of two
a. Doughnuts
b. Vane members
c. Guide rings
d. Driving shafts
Ans: b
5. The number of planetary gear sets in a hydromatic transmission system is
a. Two
b. Three
C. Four
d. Five
Ans: c
6. When coming out of overdrive, the overdrive electric control momentarily
a. De clutches the engine
b. Interrupts the ignition system action
c. De meshes the sun gear
Ans: b
7. In order for power to flow through the fluid coupling from the engine to car
wheels, the driving member
must be turning
a. Slower than driven member
b. At same speed as driven member
c. Faster than driven member
Ans: c
8. In the overdrive, there is an arrangement whereby it is possible to lock stationary
the
a. Ring gear
b. Sun gear
c. Planet pinion cage
Ans: b
9.The coil spring clutch may use from
a. Two to six springs
b. Three to nine springs
c. Four to eight springs
d. Ten to twelve springs
Ans: b
10. If the differential noise is present only when the car is rounding a curve the
trouble would be due to
a. Heavy heel contact on gear teeth
b. Heavy toe contact on gear teeth
c. Binding in differential case
Ans: c
11. To correct heavy flank contact on the ring gear teeth
a. Move the drive pinion in
b. Move the drive pinion out
c. Move the ring gear out
d. Adjust back lash as necessary
Ans: c
12. The ring gear is adjusted in the differential by use of
a. Selective washers of proper thickness
b. Bearing adjuster
c. Adjusting screws
Ans: a
13. The axle bevel gears in the differential mesh with the
a. Differential pinion gears
b. Ring gear
c. Drive pinion
d. Main gear
Ans: a
14. The ring gear is mounted on the
a. Differential housing
b. Differential carrier
c. Differential case
d. Axle housing
Ans: d
15. The outer end of the axle is supported by a
a. Spring seat
b. Sleeve bearing
c. Housing bracket
d. Ball or roller bearing
Ans: d
16. When the axle is pulled the bearing
a. Stays in the housing
b. Stays in the differential
c. Comes out with it
Ans: a
. In the differential the ring gear is bolted to the
a. Differential housing
b. Differential case
c. Axle housing
d. Drive pinion
Ans: b
18. The slip joint permits a change in the
a. Length of shaft
b. Speed of rotation
c. Angle of drive
Ans: a
19. The centre part of a typical universal joint is called the
a. Trunnion
b. Joint
c. Bearing
d. Spider
Ans: d
20. To take care of the difference in the driving angle as rear axle moves up and
down, the propeller shaft has
one or more
a. Slip joint
b. Elbow joint
c. Release joint
d. Universal joints
Ans: d
21. In the modern differential, the type of gearing used for the drive pinion and ring
gear is
a. Spur
b. Spiral bevel
c. Hypoid
Ans: c
22. The propeller shaft has one or more
a. Spur gears
b. Elbow joints
c. Universal joints
d. Fluid couplings
Ans: c
23. There is a tendency for the rear axle housing to rotate in a direction opposite to
the direction of the rear
wheels and this effect is due to
a. The torque tube
b. Acceleration
c. Rear end torque
Ans: c
24. In the slip joint, slippage occurs between internally and externally mated
a. Couplings
b. joints
c. Splines
Ans: c
25. If a noise is present in a differential only when the car moves past a curve, the
chances are that the trouble
is due to some fault in
a. Drive pinion assembly
b. Differential case assembly
c. Wheel bearing
Ans: b
Automobile Engineering Multiple Choice Interview Questions Preparation for
-
GATE Exams
26. In the differential to correct for heavy face contact on the drive gear teeth, it is
necessary to move the
a. Drive pinion in
b. Drive pinion out
c. Drive gear out and then adjust backlash
Ans: a
27. In the differential, to correct for heavy flank contact on the drive gear teeth, it is
necessary to move the
a. Drive pinion in
b. Drive pinion out
c. Drive gear out and then adjust back lash
Ans: c
28. In the differential, to correct for heavy heel contact on the drive gear teeth, it is
necessary to move the
a. Drive pinion in
b. Drive gear towards pinion
c. Drive gear away from pinion and adjust back lash
Ans: a
29. In the differential, to correct for heavy toe contact on the drive gear teeth, it is
necessary to move the
a. Drive gear towards pinion
b. Drive pinion gear away from pinion
c. Drive pinion out and adjust back lash
Ans: c
30. The drive gear in the differential is adjusted by use of
a. Selective washers of proper thickness
b. Adjustment nuts
C. Adjustment screws
Ans: a
31. The type of rear axle in which the wheel end is supported by bearings inside the
axle housing is
a. Semi floating axle
b. Three-quarter floating axle
e. Full-floating axle
Ans: a
32. The two basic types of axle are
a. Dead and floating
b. Dead and live
c. Floating and semi floating
Ans: b
33. In the differential, the ring gear is bolted to the
a. Differential housing
b. Differential case
c. Drive pinion
d. Axle shaft
Ans: b
34. In the Hotchkiss drive, the rear end torque is absorbed by the
a. Torque tube
b. Rear springs
c. Radius rods
Ans: b
35. The universal joint permits a change in the
a. Length of the shaft
b. Speed of rotation
C. Angle of drive
Ans: c
36. To correct heavy heel contact on the ring gear teeth, move the
a. Drive pinion in
b. Ring gear towards pinion
c. Ring gear away from pinion and adjust backlash
Ans: a
37. Propeller shaft includes
a. Universal joint
b. Knee joint
c. Slip joint
Ans: a
38. A humming noise in the differential is often caused by improper tooth contact
between the
a. Drive pinion & ring gear
b. Axle and side gear
C. Pinion and side gears
Ans: a
39. Axle shaft of the three-quarter floating axle is subjected to
a. Bending stress only
b. Torsional stress only
c. Bending and torsional stress
d. Torsional stress and stress due to axial force during cornering
Ans: b
40. Whirling of the propeller shafts is mainly due to
a. The transmission of torsional vibration of the crankshaft
b. The use of a sliding joint in the propeller shaft
c. The use of universal joints in the drive
d. Lack of balance and excessive length of propeller shaft
Ans: d
41. In a vehicle with dual rear axle, the wheel base is measured from the
a. Axis of the front wheel to the nearest rear wheel axis
b. Axis of the front wheel to the farthest rear wheel axis
c. Rear of cab to farthest rear wheel axis
d. Axis of the front wheel to an axis midway between the axes of rear wheels
Ans: c
42. The axle shaft of a semi floating rear axle is subjected to
a. Axial thrust only
b. Axial thrust and bending stress
c. Torsional stress only
d. Bending, torsional stresses and end thrust
Ans: d
43. Differential mechanism at the axle is provided mainly to
a. Enable the vehicle go round corners
b. Equalize the division of torque between the two wheels c. To provide a reduction
ratio
d. To turn the drive through a right angle
Ans: a
44. De Dion axle is usually
a. Used at the front of heavy vehicles
b. A kind of axle in which the differential and final drive gears are supported in the
frame
c. A two speed axle drive suited for heavy vehicles
d. The popular drive for 2 wheeler
Ans: b
45. Spur gear type of differential is unsuitable for passenger car applications because
a. It results in a very costly rear axle assembly
b. The large transmission losses due to spur gears
c. Large dimension of final drive housing resulting in reduced ground clearance
d. Centre of gravity of the vehicle is raised
Ans: d
46. Floating axles are classified on the basis of
a. The amount of torque transmitted
b. Depending upon their location whether at front or rear
c. Depending on the nature of forces like torsional vertical and lateral to which they
are subjected
d. Purely on the basis of type and number of bearings used at the work
Ans: c
47. Which of the following layouts is not used in motor vehicles?
a. Front engine front drive
b. Front engine rear drive
c. Rear engine front drive
d. Rear engine rear drive
Ans: c
48. The most popular drive at the drive axle for the passenger car is
a. Straight bevel gear
b. Spiral bevel gear
c. Worm gear drive
d. Hypoid drive
Ans: d
49. The drive line consists of the propeller shaft with
a. Drive and universal joints
b. Universal joints and slip joints
Ans: b
50. In the differential the ring gear is attached to the
a. Bevel gear
b. Drive gear
c. Differential case
d. Propeller shaft
Ans: c
1. In a differential with a gear ratio of 4:1 the drive pinion would revolve four times
to cause the ring gear to rotate
(a) 1 time
(b) 2 times
(c) 4 times
(d) 6 times
Ans: a
2. More often, the condition that draws attention to trouble in the differential is
(a) Rough operation
(b) Noise
(c) Power loss
Ans: a
3. To correct heavy toe contact on ring gear teeth, move the
(a) Ring gear towards pinion
(b) Ring gear away from pinion
(c) Drive pinion out and back lash
Ans: c
4. On a straight road, the ring gear
(a) Rotates at the same speed as wheels
(b) Rotates faster than wheels
(c) Rotates slower than wheels
(d) Does not rotate
Ans: a
5. In a passenger car a typical arrangement of braking with drum brakes will be
(a) Two leading shoes at front and leading & trailing at rear
(b) All the wheels having leading and trailing shoes
(c) All the wheels having two leading shoes
(d) Front leading and trailing, rear two leading shoes
Ans: b
6. Brake efficiency is a term which denotes
(a) Efficiency of the braking system as a whole
(b) Efficieney of the braking linings
(c) The deceleration as percentage of gravity
(d) Efficiency of the operating linkage
Ans: c
7. The most widely used brakes are operated
(a) Electrically
(b) Hydraulically
(c) By air pressure
d) By vacuum
Ans: b
8. As a rule when comparing the front and rear wheel cylinder pistons it will be
found that the pistons in the
front wheel cylinders are
(a) The same size
(b) Smaller in diameter
(c) Larger in diameter
Ans: c
9. The type of braking system referred to as power brake, makes use of
(a) Electromagnets
(b) Compressed air
(c) Vacuum
Ans: b
10. In the vacuum suspended system, the brakes are applied when
(a) Atmospheric pressure is applied to one side of the diaphragmn
(b) Vacuum is applied to both sides of diaphragm
(c) Atmospherie pressure is applied to both sides of the diaphragmn
Ans: a
11. In the atmospheric suspended system the brakes are applied when
(a) Vacuum is applied to both sides of the diaphragm
(b) Atmospheric pressure is applied to both sides of the diaphragm
(c) Atmospheric pressure is applied to one side of the diaphragm
Ans: a
12. In a vacuum suspended unit, when the brakes are on, the piston or diaphragm
has on both sides of it
(a) Atmospheric pressure
(b) Vacuum
(c) Hydraulie pressure
Ans: a
13. The function of the relay valve in a compressed air brake system is to
(a) Limit the maximum pressure reached in brake chambers
(b) Relieve air pressure in brake chambers when it reaches a maximum value
(c) Reduce the effort required at the brake pedal
(d) Speed up the supply of air to brake chambers located at a distance from brake
valve
Ans: a
14. In the hydraulic braking system, the piston in the master cylinder is connected by
mechanical linkage to the
(a) Wheel cylinders
b) Brake shoes
(c) Brake pedal
(d) Wheel pedal
Ans: c
15. In the hydraulic braking system, the movement of the pistons in the wheel
cylinder is transmitted to the
brake shoes by
(a) Actuating pins
(b) Springs
(c) Cables
(d) Trunnion
(e) Joints
Ans: a
16. Two general types of vacuum assisted power brakes are (a) Vacuum suspended
and power suspended
b) Integral and pressure suspended
(c) Atmospheric suspended and vacuum suspended
Ans: c
17. the integral type of power brake, the diaphragm acts directly on the hydraulic
piston in the
(a) Master cylinder
(b) Wheel cylinder
(c) Multiplier unit
Ans: a
18. In the multiplier type of brake, the diaphragm acts directly on the hydraulie
piston in the
(a) Master cylinder
(b) Wheel cylinder
(C) Multiplier unit
Ans: c
19. In the power assisted type of brake the bellows applies force to the master
cylinder piston
(a) Through diaphragm linkage
(b) Directly
(c) Through mechanical linkage
Ans: c
20. In the air brake, air pressure is supplied by
(a) Engine manifold
(b) A compressor
(c) The diaphragm valve
Ans: b
21. Power brakes in general operate making use of the pressure differential between
the vacuum from the
intake manifold andd
(a) Compressed air
(b) Atmospherie pressure
(c) Venturi vacuum
Ans: b
22. In the multiplier power brake system, movement of the brake pedal
(a) Increases the hydraulie pressure which actuates the control valve
(b) Actuates the valve in the bellows through linkage
(c) Actuates the valve to admit atmospheric pressure to one side of the diaphragm
Ans: c
23. In the power assisted brake system, movement of the brake pedal
(a) Increases the hydraulic pressure which actuates the control valve
(b) Actuates the valve in the bellows through linkage
(c) Actuates the valve to admit atmospherie pressure to one side of the diaphragm
Ans: c
24. The metal used for the brake drum is
(a) Aluminium alloy
(b) Cast steel
(c) Pressed steel
(d) Cast iron
Ans: d
25. Bleeding of brakes means
(a) Filling the master cylinder with brake oil
(b) Adjusting the brake shoe
(c) Removing air between master cylinder and each wheel unit
Ans: c
Automobile Engineering Interview Questions and Answers Preparation for
GATE Exams
26. In trucks the system of wheel braking employed is
(a) Mechanical
(b) Hydraulic
(c) Pneumatie
Ans: c
27. In jeeps we use
(a) Mechanical brakes
(b) Hydraulic brakes
(c) Air brakes
Ans: b
28. In a vacuum type servo-assisted brake system, vacuum is available in ..... is
made use of
(a) Exhaust manifold
(b) Combustion chamber
(c) Water jackets
(d) Inlet manifold
Ans: d
29. The approximate ratio of effort applied: effort available from servo system is (a)
1:1
(b) 3:1
(c) 1:4
(d) 10:1
Ans: b
30. Due to continuous running on a hot day the temperature of the braking fluid will
increase, hence some
braking torque is applied on brake shoes, to avoid this a small quantity of fluid will
be allowed to escape
into the master cylinder through
(a) Intake port
(b) Exhaust port
(c) Secondary port
Ans: c
31. As the load on the vehicle increase it demands
(a) Increased braking torque
(b) Decreased braking torque
(c) Same braking torque
Ans: a
32. In the hydraulic brake system, the movement of a piston in the master cylinder
produces hydraulic
pressure which causes movement of
(a) Brake shoe
(b) Brake pedal
(c) Brake cam
Ans: a
33.In the case of brake linings saturants and bonding materials are used to
(a) Facilitate moulding and curing of brake linings
(b) To improve the heat dissipating capacity of linings
(c) To give a constant coefficient of friction up to 800 C
(d) To make the lining material impervious to moisture and oil and to ensure a
steady coefficient of friction up to 3000 C
Ans: a
34. Brake lining area required for shoe brakes for trucks is mainly based on
(a) Average truck speed
(b) Frequency of brake applications
(c) Gross vehicle weight
(d) Material used for brake drums
Ans: c
35. The working fluid normally used in hydraulic brake systems is
(a) High speed diesel oil along with alcohol
(b) SAE 20 oil with anti-corrosion additives
(c) A mixture of vegetable oil and SAE 10 oil
(d) A solution of castor oil in alcohol along with neutralizer
Ans: o
36. Movement of the brake pedal forces brake fluid from the master brake cylinder
through brake lines and into the
(a) Brake shoes
(b) Wheel cylinders
(c) Brakes cables
(d) Pedal rod
Ans: b
37. During braking the brake shoe is moved outward to press against the
(a) Wheel piston or cylinder
(b) Brake lining
(c) Brake drum or disc
(d) Wheel rim or axle
Ans: c
38. In the hydraulic brake system, movement of a piston in the master cylinder
produces hydraulic pressure which causes movement of the
(a) Wheel cylinder pistons
(b) Brake pedal
(c) Brake cam
Ans: a
39. The radius of a pneumatic tyre is
(a) The radius of unloaded fully inflated tyre
(b) The height of centre of tyre from the ground when it is loaded
(c) Imaginary radius found by measuring the distance per revolution of the loaded
tyre
(d) It is fixed radius, based on the dimensions of the tyre
Ans: a
40. For a through inspection a tyre should be
(a) On the car
(b) On the wheel
(c) Off the wheel
(d) Inflated
Ans: d
41. If a tube of large size than required is installed in a tyre then
(a) The tyre will over expand
(b) The tyre and tube will not fit the rim
(c) The tube will overlap and wear
Ans: c
42. Of the four tyres on a car, the one that wears most is the
(a) Right front tyre
(b) Right rear tyre
(c) Left front tyre
(d) Left rear tyre
Ans: b
43. To equalize tyre wear, it is suggested that tyres be rotated from one wheel to
another every
(a) 80 kms
(b) 8000 kms
(c) 800 kms
Ans: b
44. The distance between dual tyres of vehicles is to be correctly spaced to
(a) Ensure proper distribution of load between dual wheels
(b) Reduce over-steering effect
(c) Reduce the slippage between tyre and road while taking a turn
(d) Ensure effective braking
Ans: c
45. When an automobile takes a tum to avoid the skidding and over turning
(a) Each wheel will roll independently
(b) Front two wheels will have a common centre during a turning
(c) All the 4 wheels will roll on ares having a common eentre
Ans: b
46. Wheels must be balanced
(a) On the car only
(b) Either on or off the car
(c) Off the car only
Ans: c
47. Weight can be attached to wheel rim to correct
(a) Wheel alignment
(b) Wheel run out
(c) Wheel balance
Ans: c
48. Toe out on turns
(a) Is adjusted by shims
(b) Is adjusted by changing the effective length of the tie rods
(c) Cannot be adjusted
Ans: c
49. Caster is defined as the inclination of
(a) Front wheel to the vertical
b) The king pin axis in the fore and aft plane
(c) The king pin axis in the transverse vertical plane
(d) The axis of stub axle to the horizontal
Ans: b
50. The Ackermann steering layout
(a) Makes for safer driving
(b) Enables the driver to feel ahead position
(c) Gives minimum tyre wear
(d) Reduces load on the kingpins and stub axle
Ans: a
1. The temperature indicating instrument in vehicles indicates the temperature of
(A) Engine piston
(B) Engine cylinder
(C) Lubricating oil
(D) Jacket cooling water
2. Two general types of tyres are
(A) Tube type and tubeless
(B) Solid and tubeless
(C) Air and pneumatic
(D) Split rim and drop centre
3. How many cells are used in a 12 volt car battery?
(A) 2
(B) 4
(C) 6
(D) 8
4. The motion of the cam is transferred to the valves through
(A) Pistons
(B) Rocker arms
(C) Camshaft pulley
(D) Valve stems
5. The power actually developed inside the engine cylinder is called as
(A) Indicated power
(B) Brake power
(C)Frictional power
(D) None of these
6. If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
(A) 17:1
(B) 15:1
(C) 13:1
(D) 10:1
7. Petrol that detonates easily is called
(A) High octane petrol
(B) Low octane petrol
(C) Unleaded petrol
(D) Blended fuel
8. The advantage of a tubeless tyre over tube type tyre is
(A) Slow air leakage
(B) Better fuel efficiency
(C) Less chances of running flat
(D) All of these
9. In a single dry plate clutch, torsional vibrations are absorbed by
(A) Coil springs known as torsional springs
(B) Cushion springs
(C) Central hub
(D) Clutch pedal
10. The battery is an electrochemical device, which means battery
(A) Makes chemicals by mechanical means
(B) Uses Chemical actions to provide electricity
(C) Has curve plates instead of flat plates
(D) Does not use an electrolyte
11. An overinflated tyre will wear the tread most near the
(A) Edges
(B) Corners
(C) Centre
(D) None of these
12. The calorific value of Diesel is about
(A) 36.5 MJ/kg
(B) 38.5 MJ/kg
(C) 42.5 MJ/kg
(D) 455 MJ/kg
13. The function of oil control rings is that it
(A) Lubricates the cylinder wall by releasing oil from its hole
(B) Keeps the eylinder wall lubricated by holding oil in its channel
(C) Prevents engine oil from going into the combustion chamber and returns excess
lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
D) Maintains a seal and prevents escape of burned gases and oil leakage
14. Two advantages of using helical gears rather than spur gears in a transmission system
are
(A) Strength and cost
(B) Strength and less end thrust
(C) Noise level and strength
(D) Noise level and economy
15. The correct flow of power through the drive train is
(A) Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
(B) Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
(C) Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
(D) Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
16. The painting of automobiles is done to
(A) Prevent rust from growing on the body
(B) Improve its external appearance
(C) Retain the characteristics of steel for long
(D) All of these
17. The calorific value of petrol is about
(A) 36.5-38.5 MJ/kg
(B) 39.4-42.5 MJ/kg
(C)42.7-43.5 MJ/kg
(D) 45-5-47 MJ/kg
18. The coefficient of friction for the clutch facing is approximately
(A) o.1
(B) o.4
(C) o.8
(D) 1.2
19. The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be
(A) R
(B) 2R
(C) 4R
(D) 4R2
20. The stroke of an engine is the
(A) Volume of the cylinder
(B) Length of the connecting rod
(C) Internal diameter of the cylinder
(D) Distance between T.D.C. and B.D.C.
21. The braking control type traction control system (TCS) generally operates in the speed
range of
(A) Less than 20 kmph
(B) Less than 40 kmph
(C) Less than 60 kmph
(D) More than 60 kmph
22. The function of a first compression ring (top ring) is that it
(A) Increases the combustion temperature
(B) Creates swirl
(C) Maintains a seal and prevents the fuel leakage
(D) Maintains a seal and prevents escape of burned gases and loss of pressure in the
combustion chamber
23. The component that connects the steering rack to the knuckles is
(A) Tie rod
(B) Sector gear
(C) Pivot
(D) Spline
24. The cetane number of a Diesel fuel is a measure of
(A) Volatility
(B) Viscosity
(C) Ignition quality
(D) Delay period
25. In petrol engines, during suction stroke,- is drawn in the cylinder
(A) Air and fuel
(B) Only fuel
(C)Onlyair
(D) None of these
26. The main feature of Macpherson strut suspension is that
(A) The vertical size of the suspension can be made more compact
(B) Non vertical external forces are supported by the suspension arms
(C) The unsprung mass in lighter
(D) The assembly is slightly more complicated in design
27. The capacity of a battery is usually expressed in terms of
(A) Volts
(B) Amperes
(C) Weight
(D) Ampere hours
28. The most commonly used power plant in automobiles is
(A) Gas turbine
(B) I.C. engine
(C) Battery
(D) None of these
29. In a square type engine
(A) Geometrical shape is square
(B) Diameter and length of piston are same
(C) Two cylinders are placed horizontal and two vertical
(D) Stroke length and cylinder bore are same
30. The path taken by intake air is
(A) Carburetor (or throttle body) air cleaner intake nmanifold intake ports cylinders
(B) Air cleaner carburetor (or throttle body) intake ports intake manifold cylinders
(C) Air cleaner intake manifold carburetor (or throttle body) intake ports cylinders
(D) Air cleaner carburetor (or throttle body) intake manifold intake ports cylinders
All Answers
1) D2) A 3) C 4) B 5) A 6) D 7) B 8) D9) A 10) B
11) C 12) C 13) C 14) C 15) B 16) D 17) C| 18) B 19)C | 20) D
21)B 22) D 23) A 24) D 25) A 26) B 27) D28) B 29) D 30) D
1. Why are the helical gears used commonly in transmission over spur gears?
(A) Low cost and high strength
(B) Low noise level and high strength
(C) Low cost and high economy
(D)Low noise level and high strength
Ans-B
2. Where is the clutch located
(A) Between transmission system and engine
(B) Between transmission system and rear axle
(C) Between propeller and differential
(D) Between transmission system and dijfferential
Ans-A
3.Which of the following is the coefficient of friction of the clutch plate
(A) 1.3
(B) 0.8
(C) 0.4
(D) 0.1
Ans-C
4. Which of the following part of the cover assembly that holds pressure plate against the clutch
plate?
(A) Spring
(B) Thrust Bearing
(C) Clutch plate
(D) friction plate
Ans- A
5. which de vice from following provides a smooth means of disengagement and engagement
between the engine and the transmission system
(A) Gearbox
(B) Propeller Shaft
(C) Clutch
(D) Brake peadal
Ans- C
6. Mechanical transmission can be of
(A) clutch, gearbox & live axle
(B) Clutch, Gearbox & dead axle transmission
(C) Clutch, Gearbox & axle less transmission
(D) All of the above
Ans-D
7. Main function of transmission system is to
(A) Burn the fuel
(B) Transfer the power from engine to the wheels
(C) To To vary the leverage between the engine and the driving wheel
(D) Both B &C
Ans-D
8. Which is not the situation when clutch is disengaged?
(A) When the vehicle is moving
(B) at the time while starting the vehicle
(C) At the time of changing gear
(D) At the time of of stopping the vehicle when the engine is at the idle condition
Ans-A
9. What are the requirements of clutch
(A) Torque Transmission
(B) Gradual Engagement
(C) To absorb the shocks
(D) Both a &b
Ans-A
10. Which is not a component of clutch
(A) Clutch plate
(B) Friction plate
(C) Pressure plate
(D) springs
Ans- D
11. Which one is type offrictional material
(A) Millboard type
(B) Woven type
(C) Molded Type
(D) All of the above
Ans- D
12. Torque transmission depends upon
(A) Size of chutch plate
(B)Coefficient offriction plate
C) Spring pressure
(D) All of the Above
Ans- D
13. Which type of clutch has high tendency to distort in transverse direction at high
speed?
(A) Coil spring clutch
(B) Multi plate clutch
(C) Single plate clutch
(D) Diaphragm Cluteh
Ans-A
14. Load deflection curve is linear in diaphragm clutch
(A) True
(B) False
Ans-B
15. Which type of clutch has non linear deflection curve?
(AJSingle plate
(B) Multi plate
CDiaphragm Clutch
(D) Coil spring clutch
Ans-C
16. Which of the following is not the component of Epicyclicgear box?
(A) Sun Wheel
(B) Brake Band
(C) Planet carrier
(D) Friction lining
Ans- D
17. What could b the reason of clutch slip?
(A) Weak or broken clutch spring
(B) Incorrect linkage adjustments
C) Both a &b
(D) None
Ans- C
18. Which component is connected to the input shaft of the flywheel
(A) Turbine
(B) Housing shell
C) Impeller
(D) None
Ans-C
19. What we use to provide maximum torque at starting of vehicle from rest and to
gradually decrease torque as vehicle gains speed
(A) Turbine
(B) Torque Converter
(C)Clutch
(D) All of these
Ans- B
20. What is he formula for tractive resistance ?
(A) Wind resistance + Gradient Resistance + Rolling Resistance
(B) Wind resistance- Gradient Resistance + Rolling Resistance
(C)Wind resistance- Gradient Resistance * Rolling Resistance
(D) Wind resistance- Gradient Resistance Rolling Resistance
-
Ans- A
21. Live axle does not rotate with wheels, but the wheel rotates on it
(A) True
(B) False
Ans-B
22. Fluid flywheel is known as
(A) Hydraulic coupling
(B) Pneumatic Coupling
(C)Both a &b
(D)None
Ans -A
23. What is used to transfer power from gearbox to differential?
(A) Tie rod
(B) Suspension
(C) Pivot
(D) Propeller shaft
Ans-D
24. The metering valve is used to proportion the breaking effect between the front
and the rear axle
(A) True
(B) False
Ans- B
25. Maximum intensity of pressure for multi plate clutch is given by
(A) e/r
(B) c/r2
(C)e/r2
(D) c/r1
Ans-A
26. Which type of joints are used when the shafts are inclined?
(A) Hingejoint
(B) Universal Joint
(C) Ball and socket
(D) Pivot joint
Ans- B
27. The axisof the two shafts are intersecting and are at 25 degree to each other.
These two shafts are connected by hook'sjoint. At which position of the drive shaft
velocity ratio will be maximum?
(A) 90°, 270°
(B) 0, 180
(C)180, 270°
(D) 90°, 180°
Ans B
-
28. Two piece propeller shaft requires one universal joint only
(A) True
(B) False
Ans- B
29. is used for a shaft that supports rotating element like wheels, drums or rope
sleeves.
(A) Spindle
(B)Axle
(C) Shaft
(D) None of the above
Ans-B
30. Frequency of axle used in torque transmission
(A) True
(B) False
Ans- B
31.It is necessary for an axle to be_ with respect to rotating element
(A) Stationary
(B) Moving
(C) Stationary and moving
(D) None of the above
Ans-
32.Counter shaft is used as secondary shaft. True or False?
(A) True
(B) False
Ans-B
33. Shafts are subjected to_ forces.
(A) Tensile
(B) compressive
(C) Shear
(D) Breaking
Ans-A
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