Automobile Engineering Practice Set-3

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1. In bias ply tyres

Belts of steel mesh are used in the tyres

All of the above

All plies run parallel to one another

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

2. A clutch is usually designed to transmit maximum torque which is

None of these

150% of the maximum engine torque

Equal to the maximum engine torque

80% of the maximum engine torque

3. The major purpose of an electronically controlled automatic transmission is that this type of transmission

Reduces shift shock and achieves more efficient transmission of engine torque

Eliminates gear clutches

Reduces the number of automatic transmission components

Eliminates the gear shaft lever

4. The crescent shaped cavity on the piston head top surface is called as

Snap ring

Valve recess

Piston oil hole

Valve clearance

5. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on

Most economical mixture

Stoichiometric mixture

Too lean mixture

Too rich mixture

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

Injection period

Spill cut-off

Ignition period

Delay period

7. The characteristic that is enhanced by the use of cylinder sleeves is

Resistance to wear

Cooling efficiency

None of these

Lubrication performance

8. An engine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression ratio is

7 : 1

8 : 1

9 : 1

10 : 1

9. The most commonly used supplementary restraint system (SRS) component is

Seat belt

Brake

Airbag

Steering

10. The engine oil level should be checked

While the engine is running at high idle speed

Immediately after the ignition switch is turned off

While the engine is running

A few minutes after the ignition switch is turned off

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

The crests between the tread grooves absorb road noise

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

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

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

12. The three basic cylinder arrangements for automotive engines are

In line, V, and opposed

V, double row, and opposed

Flat, radial, and V

In a row, in line, and opposed

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

Tractive effort

None of these

Clutch effort

Brake effort

14. The component of the oil filter that prevents the passage of metal particles and sludge is

Relief valve

Element

Check valve

Case

15. If the engine coolant leaks into the engine oil, then engine oil

None of these

Turns black

Appears milky

Become foamy

16. The main function of the brake fluid is

None of these

Cooling

Lubrication

Power transmission

17. The size of engine cylinder is referred in terms of its

Bore and length

Displacement and efficiency

Diameter and bore

Bore and stroke

18. The connecting rod connects the piston and the

Cylinder block

Camshaft

Cylinder head

Crankshaft

19. During braking, the brake shoe is moved outward to force the lining against the

Wheel piston or cylinder

Anchor pin

Brake drum

Wheel rim or axle

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

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

Reduces the amount of kickback for large steering angles

Makes the steering more responsive

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

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21. The main function of an exhaust muffler is the

Reduction of the exhaust gas volume

Reduction of exhaust noise

Reduction of nitrogen oxide in the exhaust gases

Optimization of exhaust efficiency

22. The basic purpose of tyres is to

Substitute for springs

Act as brake

None of these

Grip the road and provide good traction

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

Tetraethyl lead

Trimethyl pentane

Hexadecane

Amyl nitrate

24. In a ventilated disc brake

Disc contains radial vanes between its rubbing surfaces for optimum cooling performance

A duct directs air towards the caliper for cooling while the vehicle is moving

Caliper is covered with cooling fins

Disc contains many small holes for optimum cooling performance

25. In Diesel engines, during suction stroke, _________ is drawn in the cylinder.

Only fuel

Only air

None of these

Air and fuel

26. In automobiles G.V.W. refers to

Gross vehicle wheel track

Gross vehicle width

Gross vehicle weight

Gross vehicle wheel base

27. The clutch is located between the transmission and the

Propeller shaft

Differential

Rear axle

Engine

28. The aluminium alloy is used in cylinder blocks because

It is lighter and has good heat dissipation characteristics

The piston is also made of aluminium alloy

It does not require any cylinder liners

Material cost is low

29. Which part of the automobile tyre is subjected to greatest flexing action?

Side wall

Bead

Shoulder

Tread

30. In a four stroke engine for each crankshaft revolution, the camshaft revolves

Four turns

One turn

One half turn

Two turns

Automobile Engineering Practice Set-3

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