Automobile Engineering Practice Set-8

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

Vibration

Temperature

Contamination

Humidity

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

1.143 N

1143 N

11.43 N

114.3 N

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

4

3

1

2

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

Piston walls

Crown of the piston

Skirt of the piston

Piston rings

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

Suction compression power exhaust

Suction exhaust power compression

Exhaust compression power suction

Suction power compression exhaust

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

2

3

4

1

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

(d) None of these

(c) Both 'A' and 'B'

(b) Both valves are open

(a) Both valves are closed

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

High temperature combustion

Insufficient fuel during combustion

Insufficient air during combustion

Low temperature combustion

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

Ball bearings

Taper roller bearing

Plain bearings

Needle roller bearing

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

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

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

The internal gear is fixed to the planetary gear.

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

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

Keeping the vehicle without use for an extended period

Overcooling of the brakes during high speed driving

An excessively high engine speed on a downhill road

Overheating of the fluid due to frequent brake application

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

Steering system

Front axle

Seats

Wheels

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

Tie rod

Steering wheel

Steering gearbox

Steering shaft

14. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

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

Cylinder head

Oil pan

Separate oil tank

Oil pump

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

1000 rpm

2000 rpm

4000 rpm

500 rpm

17. The Diesel engines as compared to petrol engines require

Same size of flywheel

Smaller flywheel

No flywheel

Bigger flywheel

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

Minimizes the brake fade

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

19. The oil pump is driven by the

Crankshaft directly

Camshaft

Crankshaft via drive belt

Alternator shaft

20. A maintenance free battery

Has lead-antimony plate grid

Has lead-calcium plate grid

Does not contain water

Does not contain acid

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

None of these

Cetane number

Octane number

Performance number

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

None of these

An electric spark

The hot exhaust

The heat of compression

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

Cleaning

Bleeding

Trapping

Tapping

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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