Automobile Engineering Practice Set-8

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

3

1

2

4

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

(d) None of these

(b) Both valves are open

(a) Both valves are closed

(c) Both 'A' and 'B'

3. The oil pump is driven by the

Crankshaft via drive belt

Camshaft

Crankshaft directly

Alternator shaft

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

Cylinder head

Separate oil tank

Oil pump

Oil pan

5. A maintenance free battery

Does not contain acid

Has lead-antimony plate grid

Does not contain water

Has lead-calcium plate grid

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

Plain bearings

Needle roller bearing

Ball bearings

Taper roller bearing

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

The hot exhaust

None of these

The heat of compression

An electric spark

8. The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of lubrication oil by fuel in the crankcase

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

Minimizes the brake fade

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

Maintains directional control during braking by preventing the wheels from locking

Reduces the stopping distance

10. 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

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

1

4

3

2

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

4000 rpm

500 rpm

2000 rpm

1000 rpm

13. The Diesel engines as compared to petrol engines require

Bigger flywheel

Same size of flywheel

No flywheel

Smaller flywheel

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

Insufficient fuel during combustion

Insufficient air during combustion

Low temperature combustion

High temperature combustion

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

1143 N

1.143 N

11.43 N

114.3 N

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

Crown of the piston

Piston rings

Skirt of the piston

Piston walls

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

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.

The internal gear is fixed to the planetary gear.

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

Steering gearbox

Steering shaft

Tie rod

Steering wheel

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

Vibration

Contamination

Temperature

Humidity

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

Wheels

Steering system

Seats

Front axle

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

Overcooling of the brakes during high speed driving

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

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

Performance number

Octane number

Cetane number

None of these

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

Cleaning

Trapping

Bleeding

Tapping

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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