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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-3

May 4, 2021

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1. The three basic cylinder arrangements for automotive engines are

In a row, in line, and opposed

Flat, radial, and V

V, double row, and opposed

In line, V, and opposed

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

Gross vehicle wheel base

Gross vehicle wheel track

Gross vehicle width

Gross vehicle weight

3. 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

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

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

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

Two turns

One turn

One half turn

Four turns

5. The main function of the brake fluid is

Power transmission

None of these

Lubrication

Cooling

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

None of these

Air and fuel

Only fuel

Only air

7. A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

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

Makes the steering more responsive

Reduces the amount of kickback for large steering angles

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

Brake drum

Anchor pin

Wheel piston or cylinder

Wheel rim or axle

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

Seat belt

Airbag

Brake

Steering

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

Lubrication performance

Resistance to wear

None of these

Cooling efficiency

Page 2 of 3

11. The basic purpose of tyres is to

Substitute for springs

None of these

Grip the road and provide good traction

Act as brake

12. In a ventilated disc brake

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

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

Caliper is covered with cooling fins

Disc contains many small holes for optimum cooling performance

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

Check valve

Relief valve

Element

Case

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

None of these

Appears milky

Turns black

Become foamy

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

Tetraethyl lead

Amyl nitrate

Trimethyl pentane

Hexadecane

16. In bias ply tyres

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

All of the above

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

None of these

80% of the maximum engine torque

150% of the maximum engine torque

Equal to the maximum engine torque

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

Brake effort

None of these

Clutch effort

Tractive effort

19. The aluminium alloy is used in cylinder blocks because

The piston is also made of aluminium alloy

Material cost is low

It is lighter and has good heat dissipation characteristics

It does not require any cylinder liners

20. The engine oil level should be checked

Immediately after the ignition switch is turned off

While the engine is running at high idle speed

A few minutes after the ignition switch is turned off

While the engine is running

Page 3 of 3

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

Too rich mixture

Stoichiometric mixture

Too lean mixture

Most economical mixture

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

Ignition period

Injection period

Delay period

Spill cut-off

23. The clutch is located between the transmission and the

Rear axle

Engine

Propeller shaft

Differential

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

Bore and stroke

Bore and length

Displacement and efficiency

Diameter and bore

25. The main function of an exhaust muffler is the

Reduction of exhaust noise

Optimization of exhaust efficiency

Reduction of nitrogen oxide in the exhaust gases

Reduction of the exhaust gas volume

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

Snap ring

Valve recess

Piston oil hole

Valve clearance

27. 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

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

8 : 1

9 : 1

10 : 1

7 : 1

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

Bead

Tread

Shoulder

Side wall

30. The connecting rod connects the piston and the

Camshaft

Cylinder block

Crankshaft

Cylinder head

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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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