Automobile Engineering Practice Set-8

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1. The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is

114.3 N

1.143 N

1143 N

11.43 N

2. What type of bearing is used for main bearings and connecting rod bearings?

Ball bearings

Needle roller bearing

Plain bearings

Taper roller bearing

3. The oil pump is driven by the

Crankshaft directly

Crankshaft via drive belt

Alternator shaft

Camshaft

4. Which of the following is not a part of the chassis?

Wheels

Front axle

Seats

Steering system

5. In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is

3

2

4

1

6. The sequence order of events in a four stroke engine is

Exhaust compression power suction

Suction compression power exhaust

Suction power compression exhaust

Suction exhaust power compression

7. In an engine, the temperature of the piston will be more at the

Piston walls

Crown of the piston

Piston rings

Skirt of the piston

8. Which one of the following statements correctly describes the construction of a planetary gear type differential?

The internal gear is fixed to the planetary gear.

Each planetary pinion gear meshes with both the central gear and the internal gear.

The six planetary pinions rotate in constant mesh with the internal gears.

One drive shaft is splined to the central gear and the other to the planetary gear.

9. A maintenance free battery

Has lead-calcium plate grid

Does not contain water

Does not contain acid

Has lead-antimony plate grid

10. The condition that results in large quantities of CO emission is

Low temperature combustion

Insufficient fuel during combustion

High temperature combustion

Insufficient air during combustion

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11. In a four wheel drive (4WD), the numbers of gear boxes are

1

2

3

4

12. The main cause for the change in engine oil viscosity is

Vibration

Contamination

Humidity

Temperature

13. In a Diesel engine, the fuel is ignited by

The hot exhaust

The heat of compression

None of these

An electric spark

14. Valve overlap is the number of degrees of camshaft rotation during which

(b) Both valves are open

(d) None of these

(c) Both 'A' and 'B'

(a) Both valves are closed

15. The crankcase dilution means

Dilution of oil by water in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of fuel in the crankcase

Dilution of lubrication oil by fuel in the crankcase

16. The rating of C.I. engine fuel (Diesel) is given by

Cetane number

Performance number

Octane number

None of these

17. The operation of removing trapped air from the hydraulic braking system is known as

Tapping

Bleeding

Trapping

Cleaning

18. The Diesel engines as compared to petrol engines require

Smaller flywheel

Same size of flywheel

No flywheel

Bigger flywheel

19. The condition that causes vapour locking in a brake system is

Overheating of the fluid due to frequent brake application

Keeping the vehicle without use for an extended period

An excessively high engine speed on a downhill road

Overcooling of the brakes during high speed driving

20. The component that is responsible for converting the rotation of the steering wheel into lateral motion is the

Steering shaft

Steering gearbox

Steering wheel

Tie rod

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21. The camshaft of a four stroke Diesel engine running at 1000 rpm will run at

500 rpm

2000 rpm

4000 rpm

1000 rpm

22. The function of anti-lock brake system (ABS) is that is

Maintains directional control during braking by preventing the wheels from locking

Reduces the stopping distance

Prevents nose dives during braking and thereby postpones locking of the wheels

Minimizes the brake fade

23. The engine oil is stored in _________ when the engine is not running.

Oil pan

Cylinder head

Separate oil tank

Oil pump

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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