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

Hexadecane

Amyl nitrate

Trimethyl pentane

Tetraethyl lead

2. 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

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

9 : 1

7 : 1

8 : 1

10 : 1

4. The basic purpose of tyres is to

None of these

Substitute for springs

Grip the road and provide good traction

Act as brake

5. In bias ply tyres

All of the above

Belts of steel mesh are used in the tyres

All plies run parallel to one another

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

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

150% of the maximum engine torque

None of these

80% of the maximum engine torque

Equal to the maximum engine torque

7. The main function of the brake fluid is

Cooling

Lubrication

None of these

Power transmission

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

Displacement and efficiency

Diameter and bore

Bore and length

Bore and stroke

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

Wheel rim or axle

Wheel piston or cylinder

Anchor pin

Brake drum

10. The aluminium alloy is used in cylinder blocks because

Material cost is low

The piston is also made of aluminium alloy

It does not require any cylinder liners

It is lighter and has good heat dissipation characteristics

Page 2 of 3

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

Steering

Airbag

Seat belt

Brake

12. The engine oil level should be checked

Immediately after the ignition switch is turned off

While the engine is running

A few minutes after the ignition switch is turned off

While the engine is running at high idle speed

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

Side wall

Tread

Bead

Shoulder

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

Cooling efficiency

Lubrication performance

Resistance to wear

None of these

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

Eliminates the gear shaft lever

Reduces shift shock and achieves more efficient transmission of engine torque

Reduces the number of automatic transmission components

Eliminates gear clutches

16. The main function of an exhaust muffler is the

Optimization of exhaust efficiency

Reduction of exhaust noise

Reduction of nitrogen oxide in the exhaust gases

Reduction of the exhaust gas volume

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

None of these

Air and fuel

Only fuel

Only air

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

One turn

Two turns

Four turns

One half turn

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

Become foamy

None of these

Turns black

Appears milky

20. The three basic cylinder arrangements for automotive engines are

In a row, in line, and opposed

In line, V, and opposed

V, double row, and opposed

Flat, radial, and V

Page 3 of 3

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

Piston oil hole

Valve recess

Valve clearance

Snap ring

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

Ignition period

Delay period

Injection period

Spill cut-off

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

Gross vehicle width

Gross vehicle wheel track

Gross vehicle weight

Gross vehicle wheel base

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

Relief valve

Case

Check valve

Element

25. The clutch is located between the transmission and the

Propeller shaft

Rear axle

Engine

Differential

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

Too rich mixture

Too lean mixture

Most economical mixture

Stoichiometric mixture

27. The connecting rod connects the piston and the

Camshaft

Crankshaft

Cylinder head

Cylinder block

28. 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

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

Reduces the amount of kickback for large steering angles

Makes the steering more responsive

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

Brake effort

None of these

Tractive effort

Clutch effort

30. In a ventilated disc brake

Caliper is covered with cooling fins

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

Disc contains many small holes for optimum cooling performance

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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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