Automobile Engineering Practice Set-8

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1. The Diesel engines as compared to petrol engines require

No flywheel

Smaller flywheel

Same size of flywheel

Bigger flywheel

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

Ball bearings

Plain bearings

Taper roller bearing

Needle roller bearing

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

114.3 N

11.43 N

1143 N

1.143 N

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

Suction exhaust power compression

Suction power compression exhaust

Suction compression power exhaust

Exhaust compression power suction

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

Wheels

Steering system

Seats

Front axle

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

The heat of compression

None of these

An electric spark

The hot exhaust

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

Insufficient air during combustion

Low temperature combustion

Insufficient fuel during combustion

High temperature combustion

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

Crown of the piston

Skirt of the piston

Piston rings

Piston walls

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

Contamination

Humidity

Vibration

Temperature

10. The crankcase dilution means

Dilution of oil by water in the crankcase

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

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11. 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'

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

Octane number

None of these

Performance number

Cetane number

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

500 rpm

4000 rpm

1000 rpm

2000 rpm

14. 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

15. 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

Overheating of the fluid due to frequent brake application

An excessively high engine speed on a downhill road

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

Cleaning

Tapping

Trapping

Bleeding

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

4

3

1

2

18. A maintenance free battery

Does not contain water

Does not contain acid

Has lead-antimony plate grid

Has lead-calcium plate grid

19. The oil pump is driven by the

Camshaft

Alternator shaft

Crankshaft via drive belt

Crankshaft directly

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

2

4

1

3

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

Separate oil tank

Oil pan

Cylinder head

Oil pump

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

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

Minimizes the brake fade

Maintains directional control during braking by preventing the wheels from locking

Reduces the stopping distance

23. 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.

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

The internal gear is fixed to the planetary gear.

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

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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