Automobile Engineering Practice Set-8

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

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

Minimizes the brake fade

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

1143 N

11.43 N

1.143 N

114.3 N

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

Front axle

Seats

Steering system

Wheels

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

Suction exhaust power compression

Suction compression power exhaust

Suction power compression exhaust

Exhaust compression power suction

5. A maintenance free battery

Does not contain water

Does not contain acid

Has lead-antimony plate grid

Has lead-calcium plate grid

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

500 rpm

1000 rpm

4000 rpm

2000 rpm

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

Overheating of the fluid due to frequent brake application

An excessively high engine speed on a downhill road

Overcooling of the brakes during high speed driving

Keeping the vehicle without use for an extended period

8. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of oil by water in the crankcase

Dilution of lubrication oil by fuel in the crankcase

9. The Diesel engines as compared to petrol engines require

No flywheel

Smaller flywheel

Bigger flywheel

Same size of flywheel

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

Piston rings

Skirt of the piston

Piston walls

Crown of the piston

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11. 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

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

Trapping

Tapping

Bleeding

Cleaning

13. 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 internal gear is fixed to the planetary 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.

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

The heat of compression

The hot exhaust

An electric spark

None of these

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

Taper roller bearing

Needle roller bearing

Ball bearings

Plain bearings

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

Temperature

Humidity

Contamination

Vibration

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

(a) Both valves are closed

(d) None of these

(b) Both valves are open

(c) Both 'A' and 'B'

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

Oil pan

Cylinder head

Oil pump

Separate oil tank

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

2

4

3

1

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 oil pump is driven by the

Crankshaft via drive belt

Crankshaft directly

Alternator shaft

Camshaft

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

4

1

3

2

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

Octane number

Cetane number

None of these

Performance number

Automobile Engineering Practice Set-8

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