Automobile Engineering Practice Set-8

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

2

1

3

4

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

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

Minimizes the brake fade

Maintains directional control during braking by preventing the wheels from locking

Reduces the stopping distance

3. The Diesel engines as compared to petrol engines require

Bigger flywheel

No flywheel

Smaller flywheel

Same size of flywheel

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

Seats

Front axle

Steering system

Wheels

5. A maintenance free battery

Has lead-calcium plate grid

Has lead-antimony plate grid

Does not contain water

Does not contain acid

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

Skirt of the piston

Piston rings

Crown of the piston

Piston walls

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

(d) None of these

(c) Both 'A' and 'B'

(a) Both valves are closed

(b) Both valves are open

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

4000 rpm

500 rpm

2000 rpm

1000 rpm

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

Insufficient fuel during combustion

Insufficient air during combustion

High temperature combustion

Low temperature combustion

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

Steering shaft

Steering wheel

Tie rod

Steering gearbox

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

Suction power compression exhaust

Suction compression power exhaust

Suction exhaust power compression

Exhaust compression power suction

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

Temperature

Contamination

Humidity

Vibration

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

Plain bearings

Taper roller bearing

Ball bearings

Needle roller bearing

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

4

3

1

2

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

Cylinder head

Oil pump

Separate oil tank

Oil pan

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

None of these

An electric spark

The hot exhaust

The heat of compression

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

Trapping

Bleeding

Tapping

Cleaning

18. 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

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

Performance number

Octane number

Cetane number

None of these

20. The oil pump is driven by the

Camshaft

Alternator shaft

Crankshaft via drive belt

Crankshaft directly

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21. 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.

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

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

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

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

11.43 N

114.3 N

1.143 N

1143 N

23. The crankcase dilution means

Dilution of lubrication oil by fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Automobile Engineering Practice Set-8

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