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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-3

May 4, 2021

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Page 1 of 3

1. The clutch is located between the transmission and the

Engine

Rear axle

Differential

Propeller shaft

2. 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

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

Stoichiometric mixture

Most economical mixture

Too lean mixture

Too rich mixture

4. 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

5. In a ventilated disc brake

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

Caliper is covered with cooling fins

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

Disc contains many small holes for optimum cooling performance

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

Appears milky

None of these

Turns black

Become foamy

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

None of these

Cooling efficiency

Resistance to wear

Lubrication performance

8. The basic purpose of tyres is to

Grip the road and provide good traction

Substitute for springs

None of these

Act as brake

9. In bias ply tyres

All of the above

Belts of steel mesh are used in the tyres

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

All plies run parallel to one another

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

Anchor pin

Wheel piston or cylinder

Brake drum

Wheel rim or axle

Page 2 of 3

11. 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

The crests between the tread grooves absorb road noise

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

12. The engine oil level should be checked

While the engine is running

While the engine is running at high idle speed

A few minutes after the ignition switch is turned off

Immediately after the ignition switch is turned off

13. The main function of the brake fluid is

Power transmission

Lubrication

None of these

Cooling

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

Valve recess

Piston oil hole

Snap ring

Valve clearance

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

Relief valve

Case

Check valve

Element

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

Air and fuel

Only air

Only fuel

None of these

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

One half turn

Two turns

Four turns

One turn

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

Tetraethyl lead

Trimethyl pentane

Hexadecane

Amyl nitrate

19. 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

20. The main function of an exhaust muffler is the

Optimization of exhaust efficiency

Reduction of exhaust noise

Reduction of the exhaust gas volume

Reduction of nitrogen oxide in the exhaust gases

Page 3 of 3

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

Bore and length

Diameter and bore

Displacement and efficiency

Bore and stroke

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

9 : 1

7 : 1

10 : 1

8 : 1

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

None of these

Brake effort

Clutch effort

Tractive effort

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

Side wall

Shoulder

Tread

Bead

25. The three basic cylinder arrangements for automotive engines are

In a row, in line, and opposed

In line, V, and opposed

Flat, radial, and V

V, double row, and opposed

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

Equal to the maximum engine torque

150% of the maximum engine torque

80% of the maximum engine torque

None of these

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

Airbag

Seat belt

Steering

Brake

28. The connecting rod connects the piston and the

Cylinder block

Cylinder head

Crankshaft

Camshaft

29. 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

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

Gross vehicle width

Gross vehicle weight

Gross vehicle wheel track

Gross vehicle wheel base

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Tags: Automobile Automobile Engineering MCQs Engineering Mechanical Engineering

VideRime

A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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