Automobile Engineering Practice Set-8

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1. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

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

None of these

Cetane number

Performance number

Octane number

3. The Diesel engines as compared to petrol engines require

Bigger flywheel

No flywheel

Same size of flywheel

Smaller flywheel

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

Cleaning

Trapping

Bleeding

Tapping

5. A maintenance free battery

Has lead-calcium plate grid

Has lead-antimony plate grid

Does not contain water

Does not contain acid

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

Steering shaft

Steering wheel

Steering gearbox

Tie rod

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

Steering system

Seats

Wheels

Front axle

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

4000 rpm

500 rpm

1000 rpm

2000 rpm

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

Suction exhaust power compression

Suction power compression exhaust

Exhaust compression power suction

Suction compression power exhaust

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

3

4

2

1

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

2

3

1

4

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

Contamination

Temperature

Vibration

Humidity

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

The hot exhaust

The heat of compression

None of these

An electric spark

14. The oil pump is driven by the

Crankshaft via drive belt

Alternator shaft

Crankshaft directly

Camshaft

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

Piston rings

Piston walls

Skirt of the piston

Crown of the piston

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

Reduces the stopping distance

Minimizes the brake fade

Maintains directional control during braking by preventing the wheels from locking

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

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

1.143 N

11.43 N

114.3 N

1143 N

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

(c) Both 'A' and 'B'

(d) None of these

(a) Both valves are closed

(b) Both valves are open

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

Ball bearings

Plain bearings

Taper roller bearing

Needle roller bearing

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

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.

The internal gear is fixed to the planetary gear.

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

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

Overheating of the fluid due to frequent brake application

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

Low temperature combustion

Insufficient fuel during combustion

Insufficient air during combustion

High temperature combustion

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

Oil pump

Separate oil tank

Oil pan

Cylinder head

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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