Automobile Engineering Practice Set-8

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1. A maintenance free battery

Has lead-antimony plate grid

Has lead-calcium plate grid

Does not contain water

Does not contain acid

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

Ball bearings

Taper roller bearing

Needle roller bearing

Plain bearings

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

Performance number

Cetane number

None of these

Octane number

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

High temperature combustion

Insufficient air during combustion

Low temperature combustion

Insufficient fuel during combustion

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

An excessively high engine speed on a downhill road

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

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

The hot exhaust

An electric spark

None of these

The heat of compression

7. 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

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 oil pump is driven by the

Camshaft

Crankshaft via drive belt

Alternator shaft

Crankshaft directly

10. 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

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

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.

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

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

1

4

3

2

13. The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines

Dilution of lubrication oil by fuel in the crankcase

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

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

1143 N

114.3 N

1.143 N

11.43 N

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

Separate oil tank

Cylinder head

Oil pan

Oil pump

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

Wheels

Front axle

Steering system

Seats

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

Piston walls

Piston rings

Crown of the piston

Skirt of the piston

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

3

2

1

4

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

(c) Both 'A' and 'B'

(a) Both valves are closed

(b) Both valves are open

(d) None of these

20. 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

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21. The Diesel engines as compared to petrol engines require

Smaller flywheel

Bigger flywheel

Same size of flywheel

No flywheel

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

Temperature

Humidity

Contamination

Vibration

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

Trapping

Bleeding

Cleaning

Tapping

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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