Automobile Engineering Practice Set-8

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

Performance number

Octane number

Cetane number

None of these

2. 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.

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

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

Seats

Wheels

Front axle

Steering system

4. 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'

5. The oil pump is driven by the

Crankshaft via drive belt

Crankshaft directly

Alternator shaft

Camshaft

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

Plain bearings

Ball bearings

Taper roller bearing

Needle roller bearing

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

The heat of compression

The hot exhaust

None of these

An electric spark

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

Bleeding

Trapping

Cleaning

Tapping

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

Reduces the stopping distance

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

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

Separate oil tank

Oil pump

Cylinder head

Oil pan

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

Skirt of the piston

Piston walls

Piston rings

Crown of the piston

12. A maintenance free battery

Has lead-antimony plate grid

Does not contain acid

Does not contain water

Has lead-calcium plate grid

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

1000 rpm

2000 rpm

4000 rpm

500 rpm

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

11.43 N

1.143 N

114.3 N

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

Insufficient air during combustion

High temperature combustion

Insufficient fuel during combustion

Low temperature combustion

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

2

3

4

1

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

Temperature

Vibration

Humidity

Contamination

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

3

4

1

2

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

Keeping the vehicle without use for an extended period

Overheating of the fluid due to frequent brake application

Overcooling of the brakes during high speed driving

An excessively high engine speed on a downhill road

20. The Diesel engines as compared to petrol engines require

Smaller flywheel

No flywheel

Same size of flywheel

Bigger flywheel

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21. 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

22. The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines

Dilution of fuel in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of oil by water in the crankcase

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

Tie rod

Steering gearbox

Steering shaft

Steering wheel

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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