Automobile Engineering Practice Set-3

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

Become foamy

Turns black

None of these

Appears milky

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

Gross vehicle width

Gross vehicle wheel base

Gross vehicle weight

Gross vehicle wheel track

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

Tread

Side wall

Shoulder

Bead

4. The engine oil level should be checked

A few minutes after the ignition switch is turned off

Immediately after the ignition switch is turned off

While the engine is running

While the engine is running at high idle speed

5. The basic purpose of tyres is to

Act as brake

Grip the road and provide good traction

None of these

Substitute for springs

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

Anchor pin

Brake drum

Wheel piston or cylinder

Wheel rim or axle

7. In a ventilated disc brake

Caliper is covered with cooling fins

Disc contains many small holes for optimum cooling performance

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

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

One half turn

One turn

Four turns

Two turns

9. The clutch is located between the transmission and the

Propeller shaft

Differential

Engine

Rear axle

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

Reduces the number of automatic transmission components

Eliminates gear clutches

Reduces shift shock and achieves more efficient transmission of engine torque

Eliminates the gear shaft lever

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

Steering

Seat belt

Airbag

Brake

12. The aluminium alloy is used in cylinder blocks because

It is lighter and has good heat dissipation characteristics

It does not require any cylinder liners

Material cost is low

The piston is also made of aluminium alloy

13. The main function of an exhaust muffler is the

Reduction of exhaust noise

Reduction of the exhaust gas volume

Optimization of exhaust efficiency

Reduction of nitrogen oxide in the exhaust gases

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

Piston oil hole

Snap ring

Valve recess

Valve clearance

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

9 : 1

8 : 1

10 : 1

7 : 1

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

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

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 crests between the tread grooves absorb road noise

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

Hexadecane

Tetraethyl lead

Trimethyl pentane

Amyl nitrate

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

None of these

Clutch effort

Brake effort

Tractive effort

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

Diameter and bore

Bore and stroke

Bore and length

Displacement and efficiency

20. The main function of the brake fluid is

None of these

Power transmission

Lubrication

Cooling

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

Cooling efficiency

Lubrication performance

None of these

Resistance to wear

22. The three basic cylinder arrangements for automotive engines are

In a row, in line, and opposed

V, double row, and opposed

In line, V, and opposed

Flat, radial, and V

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

Only fuel

Only air

Air and fuel

None of these

24. In bias ply tyres

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

All plies run parallel to one another

All of the above

Belts of steel mesh are used in the tyres

25. 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

Makes the steering more responsive

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

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

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

Too lean mixture

Too rich mixture

Most economical mixture

Stoichiometric mixture

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

Spill cut-off

Injection period

Delay period

Ignition period

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

150% of the maximum engine torque

Equal to the maximum engine torque

80% of the maximum engine torque

None of these

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

Element

Relief valve

Check valve

Case

30. The connecting rod connects the piston and the

Cylinder head

Camshaft

Crankshaft

Cylinder block

Automobile Engineering Practice Set-3

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