Automobile Engineering Practice Set-8

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

None of these

Performance number

Cetane number

Octane number

2. The Diesel engines as compared to petrol engines require

No flywheel

Bigger flywheel

Same size of flywheel

Smaller flywheel

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

Bleeding

Cleaning

Trapping

Tapping

4. 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

5. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of lubrication oil by fuel in the crankcase

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

Steering gearbox

Tie rod

Steering shaft

Steering wheel

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

1

4

2

3

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

Oil pan

Separate oil tank

Oil pump

Cylinder head

9. 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

114.3 N

1.143 N

10. 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

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

Exhaust compression power suction

Suction exhaust power compression

Suction compression power exhaust

Suction power compression exhaust

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

Contamination

Temperature

Vibration

Humidity

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

Wheels

Steering system

Seats

Front axle

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

(a) Both valves are closed

(c) Both 'A' and 'B'

(b) Both valves are open

(d) None of these

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

The hot exhaust

None of these

An electric spark

The heat of compression

16. 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

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

2

3

1

4

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

Plain bearings

Taper roller bearing

Ball bearings

Needle roller bearing

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

2000 rpm

500 rpm

1000 rpm

4000 rpm

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

Maintains directional control during braking by preventing the wheels from locking

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

Minimizes the brake fade

Reduces the stopping distance

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21. 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.

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.

The internal gear is fixed to the planetary gear.

22. A maintenance free battery

Has lead-calcium plate grid

Does not contain water

Does not contain acid

Has lead-antimony plate grid

23. The oil pump is driven by the

Crankshaft directly

Camshaft

Crankshaft via drive belt

Alternator shaft

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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