Ignition System
Tech A says that a Hall-effect sensor can be used in an
electronic ignition system. Tech B says that an optical-type
sensor can be used in an electronic ignition system. Who is
correct? Both A and B
The amount of voltage needed to initially get the spark to jump
the spark plug gap is called the: Requires Voltage
Tech A says that you can test for defective ignition wires by using a spray
bottle and water. Tech B says that you can test for defective ignition wires with
a grounded test lead. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
The hottest part of the spark plug is the Centre Electrode
A high-voltage spark must cross the spark plug electrode as the piston
approaches top dead center (TDC) of the
Exhaust stroke.
Ignition stroke.
Intake stroke.
Compression stroke
Tech A says that a secondary ignition shock is enough to kill you. Tech B says
that a secondary ignition shock does not have enough current to kill you. Who
is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
When the driver turns the key to the start position, an electrical
connection is made between the vehicle battery and the
____________ of the ignition coil.
Secondary winding
Ballast resistor
Primary winding
Distributor
Tech A says that it is easiest to set the spark plug gap on all the plugs at one
time. Tech B says that spark plugs come pre-gapped and you should never
have to check spark plug gap. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
The type of ignition system in which two cylinders share one coils is called a:
Distributor ignition system.
Waste spark ignition system.
Coil-on plug ignition system.
None of the above
Tech A says that a defective crankshaft or camshaft position sensor can
prevent an engine from starting. Tech B says that if a diagnostic trouble code
(DTC) indicates a problem with the crankshaft or camshaft position sensor,
you will always have to replace the sensor. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
The component the ignition system uses to convert low voltage and high
current into high voltage and low current is called the:
Ballast resistor.
Advance mechanism.
Condenser.
Induction coil
The pattern in which a lab scope shows all the cylinders firing in sequence is
called the:
Parade pattern.
Raster pattern.
Spark line.
Firing line
Tech A says that you can test the ignition coil with an ohmmeter. Tech B says
you can't test the ignition coil with an oscilloscope. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Ignition coils are basically:
Step-down transformers.
Step-up transformers.
Ballast resistors.
Switching transistors.
Tech A says that a secondary ignition shock is enough to kill
you. Tech B says that a secondary ignition shock does not have
enough current to kill you. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says that ignition coils are essentially transformers. Tech B says that
the primary side of the coil delivers the high voltage spark that is necessary to
jump the plug gap. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
When the driver turns the key to the start position, an electrical
connection is made between the vehicle battery and the
____________ of the ignition coil.
Secondary winding
Ballast resistor
Primary winding
When the driver turns the key to the start position, an electrical
connection is made between the vehicle battery and the
____________ of the ignition coil.
Secondary winding
Ballast resistor
Primary winding
1-In Battery coil ignition system, the correct sequence of flow of current is
(A) Battery – Ammeter – Ignition coil – Distributor – Spark plug
(B) Battery – Ignition coil – Ammeter – Distributor – Spark plug
(C) Battery – Ammeter – Distributor – Ignition coil – Spark plug
(D) Battery – Distributor – Ammeter – Ignition coil – Spark plug
(Ans: A)
2-The induction coil steps up low voltage current of 6 or 12 volts to high voltage current upto
about
(A) 10,000 volts
(B) 17,000 volts
(C) 25,000 volts
(D) 35,000 volts
(Ans: C)
3-In ignition coil, the ratio between the number of turns of primary and secondary windings is
about
(A) 1 to 50
(B) 1 to 100
(C) 1 to 200
(D) 1 to 400
(Ans: B)
4-The distributor serves the following purposes in the ignition system
(A) It operates break and make mechanism
(B) It distributes high tension current to spark plug at correct time
(C) both (A) and (B)
(D) None of the above
(Ans: C)
5-The drive shaft in distributor is rotated at ___ the engine speed in four stroke engine
(A) half
(B) equal to
(C) one and half times
(D) double
(Ans: A)
6-The _____ provides a reservoir for the current induced in the primary circuit at the time of
break.
(A) induction coil
(B) distributor
(C) condenser
(D) governor
(Ans: C)
7-The following affect the voltage required to jump over the gap of spark plug
(A) Shape of electrode forming gap
(B) The conductivity of gases in the gap
(C) Fuel-air mixture ratio existing in the gap
(D) All of the above
(Ans: D)
8-In Magneto Ignition system
(A) No battery is required
(B) Engine starting is rather difficult
(C) used in high speed engines
(D) All of the above
(Ans: D)
9-In four cylinder in-line engine, the probable firing order is
(A) 1-3-4-2
(B) 1-2-3-4
(C) 2-4-1-3
(D) 2-1-3-4
(Ans: A)
10-The following is known as ‘Breakerless Ignition system’
(A) Battery coil ignition system
(B) Magneto Ignition system
(C) Electronic Ignition system
(D) Capacitive discharge Ignition system
(Ans: C)
11-A solid state switch, known as Thyristor is employed in
(A) Battery coil ignition system
(B) Magneto Ignition system
(C) Electronic Ignition system
(D) Capacitive discharge Ignition system
(Ans: D)
12-The following is (are) the advantage(s) of Electronic Ignition system
(A) Produces maximum output voltage
(B) Better starting with cold engine
(C) Less possibility of arcing at spark plug
(D) All of the above
(Ans: D)
