Automobile Engineering Practice Set-3

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1. The three basic cylinder arrangements for automotive engines are

In a row, in line, and opposed

V, double row, and opposed

Flat, radial, and V

In line, V, and opposed

2. The clutch is located between the transmission and the

Rear axle

Engine

Propeller shaft

Differential

3. The main function of an exhaust muffler is the

Reduction of the exhaust gas volume

Optimization of exhaust efficiency

Reduction of exhaust noise

Reduction of nitrogen oxide in the exhaust gases

4. The basic purpose of tyres is to

Substitute for springs

None of these

Grip the road and provide good traction

Act as brake

5. 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

6. The connecting rod connects the piston and the

Cylinder block

Cylinder head

Camshaft

Crankshaft

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

Gross vehicle width

Gross vehicle wheel track

Gross vehicle wheel base

Gross vehicle weight

8. In bias ply tyres

Belts of steel mesh are used in the tyres

All plies run parallel to one another

All of the above

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

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

Bead

Side wall

Tread

Shoulder

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

Air and fuel

None of these

Only fuel

Only air

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11. 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

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

12. The aluminium alloy is used in cylinder blocks because

It is lighter and has good heat dissipation characteristics

Material cost is low

The piston is also made of aluminium alloy

It does not require any cylinder liners

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

Tractive effort

Brake effort

None of these

Clutch effort

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

Wheel piston or cylinder

Wheel rim or axle

Brake drum

Anchor pin

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

Bore and length

Displacement and efficiency

Bore and stroke

Diameter and bore

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

Become foamy

None of these

Turns black

Appears milky

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

Amyl nitrate

Tetraethyl lead

Hexadecane

Trimethyl pentane

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

Resistance to wear

Lubrication performance

Cooling efficiency

None of these

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

Relief valve

Case

Check valve

Element

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

9 : 1

10 : 1

7 : 1

8 : 1

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

Airbag

Seat belt

Steering

Brake

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

Injection period

Ignition period

Delay period

Spill cut-off

23. 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

While the engine is running

Immediately after the ignition switch is turned off

24. The main function of the brake fluid is

None of these

Cooling

Power transmission

Lubrication

25. 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 the gear shaft lever

Reduces the number of automatic transmission components

Eliminates gear clutches

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

Stoichiometric mixture

Too lean mixture

Most economical mixture

Too rich mixture

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

One turn

Two turns

One half turn

Four turns

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

150% of the maximum engine torque

80% of the maximum engine torque

Equal to the maximum engine torque

None of these

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

Valve recess

Snap ring

Piston oil hole

Valve clearance

30. In a ventilated disc brake

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

Disc contains many small holes for optimum cooling performance

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

Caliper is covered with cooling fins

Automobile Engineering Practice Set-3

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