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

Minimizes the brake fade

Reduces the stopping distance

Maintains directional control during braking by preventing the wheels from locking

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

Oil pump

Oil pan

Separate oil tank

Cylinder head

3. The crankcase dilution means

Dilution of lubrication oil by fuel in the crankcase

Dilution of fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of oil by water in the crankcase

4. 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

Overcooling of the brakes during high speed driving

An excessively high engine speed on a downhill road

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

Taper roller bearing

Ball bearings

Plain bearings

Needle roller bearing

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

None of these

An electric spark

The hot exhaust

The heat of compression

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

Contamination

Humidity

Vibration

Temperature

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

Piston rings

Skirt of the piston

Crown of the piston

Piston walls

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

Steering wheel

Steering gearbox

Tie rod

Steering shaft

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

Cleaning

Trapping

Tapping

Bleeding

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

Insufficient air during combustion

Low temperature combustion

High temperature combustion

Insufficient fuel during combustion

12. The oil pump is driven by the

Crankshaft directly

Alternator shaft

Camshaft

Crankshaft via drive belt

13. 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.

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.

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

14. 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

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

Front axle

Wheels

Seats

Steering system

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

Cetane number

Octane number

Performance number

None of these

17. The Diesel engines as compared to petrol engines require

No flywheel

Smaller flywheel

Same size of flywheel

Bigger flywheel

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

4

1

2

3

19. 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

1143 N

1.143 N

114.3 N

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

500 rpm

2000 rpm

1000 rpm

4000 rpm

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

2

1

4

3

22. 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

23. A maintenance free battery

Has lead-calcium plate grid

Does not contain acid

Has lead-antimony plate grid

Does not contain water

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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