Automobile Engineering Practice Set-3

1. The main function of an exhaust muffler is the

Optimization of exhaust efficiency

Reduction of the exhaust gas volume

Reduction of exhaust noise

Reduction of nitrogen oxide in the exhaust gases

2. The torque available at the contact between driving wheels and road is known as

Clutch effort

Brake effort

None of these

Tractive effort

3. The clutch is located between the transmission and the

Differential

Engine

Rear axle

Propeller shaft

4. The main function of the tread pattern on tyre is that

The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating

The tread pattern protects the tyre's inner carcass from small stones and pieces of glass

In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

The crests between the tread grooves absorb road noise

5. A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Reduces the amount of kickback for large steering angles

Allows the steering wheel to be turned by a greater amount when steering

Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

Makes the steering more responsive

6. In Diesel engines, the duration between the time of injection and the time of ignition is called

Ignition period

Spill cut-off

Injection period

Delay period

7. The antiknock property of compression ignition engine fuel can be improved by adding

Tetraethyl lead

Hexadecane

Trimethyl pentane

Amyl nitrate

8. In bias ply tyres

One ply layer runs diagonally one way and another layer runs diagonally the other way

All of the above

All plies run parallel to one another

Belts of steel mesh are used in the tyres

9. The basic purpose of tyres is to

Substitute for springs

None of these

Grip the road and provide good traction

Act as brake

10. The engine oil level should be checked

A few minutes after the ignition switch is turned off

While the engine is running at high idle speed

Immediately after the ignition switch is turned off

While the engine is running

Automobile Engineering Practice Set-3

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Automobile Engineering Practice Set-3

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