Automobile Engineering Practice Set-8

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

2000 rpm

4000 rpm

1000 rpm

500 rpm

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

Front axle

Steering system

Wheels

Seats

3. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of oil by water in the crankcase

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

Ball bearings

Taper roller bearing

Needle roller bearing

Plain bearings

5. 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.

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

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

The internal gear is fixed to the planetary gear.

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

Oil pan

Cylinder head

Separate oil tank

Oil pump

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

None of these

Performance number

Octane number

Cetane number

8. 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

1.143 N

114.3 N

1143 N

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

High temperature combustion

Insufficient fuel during combustion

Insufficient air during combustion

Low temperature combustion

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

(b) Both valves are open

(c) Both 'A' and 'B'

(d) None of these

(a) Both valves are closed

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11. The oil pump is driven by the

Alternator shaft

Crankshaft via drive belt

Crankshaft directly

Camshaft

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

2

1

3

4

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

Bleeding

Cleaning

Trapping

Tapping

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

Skirt of the piston

Crown of the piston

Piston walls

Piston rings

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

Temperature

Humidity

Vibration

Contamination

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

Reduces the stopping distance

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

Maintains directional control during braking by preventing the wheels from locking

Minimizes the brake fade

17. A maintenance free battery

Does not contain water

Does not contain acid

Has lead-calcium plate grid

Has lead-antimony plate grid

18. 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

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

The hot exhaust

The heat of compression

An electric spark

None of these

20. The Diesel engines as compared to petrol engines require

Smaller flywheel

Same size of flywheel

No flywheel

Bigger flywheel

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21. 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

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

An excessively high engine speed on a downhill road

Overcooling of the brakes during high speed driving

Keeping the vehicle without use for an extended period

Overheating of the fluid due to frequent brake application

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

1

3

2

4

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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