B.E / B.Tech.
PRACTICAL END SEMESTER EXAMINATIONS
Seventh Semester
AT8712 VEHICLE MAINTENANCE LABORATORY
(Regulations 2017)
Time : 3 Hours Answer any one Question Max. Marks 100
Aim / Procedure Diagrams / Assembling Viva-Voce Record Total
Dismantling & Results
20 30 30 10 10 100
1. Check the given cylinder bore, setting the bore tool and re-bore the worn out cylinder bore for a
given dimension by using cylinder re-boring machine.
2. (i) To contact the wheel alignment test on the given vehicles and to find the castor angle and
camber king pin inclination and Toe-in and Toe-out for a given vehicles using wheel aligner
(ii) Explain the significance of the above wheel alignment parameters.
3. Dismantle and assemble the given carburetor and tune the given two stroke petrol vehicle. Check
and set the following parameters.
i) Ignition timing
ii) Idling speed
iii) Clean the air filter and fuel filter.
4. Assemble the given fuel injection pump and do the basic settings using FIP test rig.
5. Dismantle and assemble the fuel injector and set the nozzle opening pressure of 180/200 bar.
Check the NOP using nozzle tester.
6. i) Set the fuel injection timing for 23o bTDC and remove the air lock in a given single cylinder
diesel engine. `
ii) Explain the different types of records maintained in four wheeler workshop.
7. Study and remove the air lock in hydraulic brake system and adjust the brake shoe for wear.
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8. i) Explain the different types of records maintained in two wheeler work shop.
ii) Set the inlet and exhaust valve clearance in single cylinder diesel engine.
9. i ) Set the inlet and exhaust valve clearance in a multi cylinder diesel engine
ii) Draw the different types of work shop layout in two wheeler automobile service station.
10. Conduct the following tests in a given battery
i. Individual cell voltage
ii. Heavy discharge test
iii. Check the specific gravity of electrolyte
iv. Calculate the charging voltage and current setting
11. Conduct the engine diagnosis test of a given four wheeled vehicle using engine analyzer and
suggest the service requirements of a car.
12. Draw the ignition system of a given four cylinder petrol engine and rectify the faults in the ignition
system to start the engine.
13. Conduct the following reconditioning operation for the inlet and exhaust valves of a multi cylinder
engine cylinder head.
i. Valve grinding and checking the valve angle
ii. Valve lapping and seating
iii. Checking for valve leakage test
14. Adjust the clutch pedal play, brake pedal play, hand brake play and steering wheel play of a given
vehicle as per manufacture’s specification.
15. Do the following practical operations at the given vehicle:
(i) Remove and fit tyre and tube of any one wheel.
(ii) Wheel bearing tightening and adjustment.
(iii) Adjust the head light beam.
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