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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-3

May 4, 2021

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

8 : 1

9 : 1

7 : 1

10 : 1

2. The three basic cylinder arrangements for automotive engines are

In line, V, and opposed

Flat, radial, and V

V, double row, and opposed

In a row, in line, and opposed

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

Anchor pin

Wheel rim or axle

Brake drum

Wheel piston or cylinder

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

Tread

Shoulder

Bead

Side wall

5. 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

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

Too rich mixture

Most economical mixture

Stoichiometric mixture

Too lean mixture

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

Bore and stroke

Bore and length

Displacement and efficiency

Diameter and bore

8. The main function of the brake fluid is

None of these

Power transmission

Lubrication

Cooling

9. The clutch is located between the transmission and the

Propeller shaft

Rear axle

Engine

Differential

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

Airbag

Steering

Seat belt

Brake

Page 2 of 3

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

Tetraethyl lead

Trimethyl pentane

Hexadecane

Amyl nitrate

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

Check valve

Relief valve

Element

Case

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

Tractive effort

Clutch effort

Brake effort

None of these

14. 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 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

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

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

Injection period

Delay period

Spill cut-off

Ignition period

16. The engine oil level should be checked

While the engine is running

A few minutes after the ignition switch is turned off

Immediately after the ignition switch is turned off

While the engine is running at high idle speed

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

Air and fuel

None of these

Only air

Only fuel

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

One half turn

One turn

Four turns

Two turns

19. The aluminium alloy is used in cylinder blocks because

Material cost is low

It does not require any cylinder liners

It is lighter and has good heat dissipation characteristics

The piston is also made of aluminium alloy

20. The main function of an exhaust muffler is the

Optimization of exhaust efficiency

Reduction of the exhaust gas volume

Reduction of exhaust noise

Reduction of nitrogen oxide in the exhaust gases

Page 3 of 3

21. 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

22. The basic purpose of tyres is to

Grip the road and provide good traction

None of these

Act as brake

Substitute for springs

23. 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

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

Gross vehicle width

Gross vehicle wheel base

Gross vehicle weight

Gross vehicle wheel track

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

Valve recess

Valve clearance

Piston oil hole

Snap ring

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

Lubrication performance

None of these

Cooling efficiency

Resistance to wear

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

Equal to the maximum engine torque

80% of the maximum engine torque

None of these

150% of the maximum engine torque

29. The connecting rod connects the piston and the

Camshaft

Crankshaft

Cylinder block

Cylinder head

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

None of these

Appears milky

Turns black

Become foamy

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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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