Automobile Engineering Practice Set-8

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1. A maintenance free battery

Has lead-antimony plate grid

Does not contain acid

Does not contain water

Has lead-calcium plate grid

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

3

4

2

1

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

An electric spark

The heat of compression

None of these

The hot exhaust

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

Oil pan

Separate oil tank

Cylinder head

Oil pump

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

(d) None of these

(c) Both 'A' and 'B'

(a) Both valves are closed

(b) Both valves are open

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

Suction compression power exhaust

Exhaust compression power suction

Suction exhaust power compression

Suction power compression exhaust

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

1143 N

1.143 N

11.43 N

114.3 N

8. The Diesel engines as compared to petrol engines require

No flywheel

Smaller flywheel

Bigger flywheel

Same size of flywheel

9. 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.

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

The internal gear is fixed to the planetary gear.

10. The oil pump is driven by the

Alternator shaft

Crankshaft directly

Camshaft

Crankshaft via drive belt

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

Vibration

Contamination

Humidity

Temperature

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

3

1

4

2

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

Crown of the piston

Piston walls

Skirt of the piston

Piston rings

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

Tapping

Cleaning

Trapping

Bleeding

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

Maintains directional control during braking by preventing the wheels from locking

Minimizes the brake fade

Reduces the stopping distance

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

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

Cetane number

Performance number

None of these

Octane number

17. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

18. 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

Overcooling of the brakes during high speed driving

Keeping the vehicle without use for an extended period

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

High temperature combustion

Low temperature combustion

Insufficient fuel during combustion

Insufficient air during combustion

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

Needle roller bearing

Taper roller bearing

Plain bearings

Ball bearings

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

Tie rod

Steering wheel

Steering gearbox

Steering shaft

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

1000 rpm

2000 rpm

4000 rpm

500 rpm

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

Wheels

Front axle

Steering system

Seats

Automobile Engineering Practice Set-8

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Automobile Engineering Practice Set-8

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