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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-1

May 2, 2021

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Page 1 of 3

1. The coefficient of friction for the clutch facing is approximately

1.2

0.8

0.4

0.1

2. The octane rating of petrol commercially available is

100-110

110-125

85-95

95-100

3. The connecting rods are generally made of __________ shaped cross-section.

H

C

I

L

4. The capacity of a battery is usually expressed in terms of

Amperes

Ampere hours

Weight

Volts

5. The condition that results in large quantities of HC emission is

Low temperature combustion

Incomplete combustion

High temperature combustion

High atmospheric temperature combustion

6. The brake warning light warns the driver of

Failure of the primary or secondary circuit of hydraulic system

Power brake failure

Air in the hydraulic system

Water in the master cylinder

7. The negative plates of a lead acid battery has

Sulphuric acid (H₂SO₄)

Lead peroxide (PbO₂)

Lead sulphate (PbSO₄)

Spongy lead (Pb)

8. The most commonly used power plant in automobiles is

Battery

Gas turbine

I.C. engine

None of these

9. In a square type engine

Two cylinders are placed horizontal and two vertical

Geometrical shape is square

Stroke length and cylinder bore are same

Diameter and length of piston are same

10. The engine oil viscosity is defined by ___________ ratings.

Gross vehicle weight (GVW)

American petroleum institute (API)

Society of automotive engineers (SAE)

Automatic transmission fluid (ATF)

Page 2 of 3

11. The component that connects the steering rack to the knuckles is

Pivot

Tie rod

Spline

Sector gear

12. When the brake pedal free play is less than the specified value, then the

Brake fades

Antilock braking system malfunctions

Vapour locking occurs in the brake lines

Brake drags

13. The main feature of Macpherson strut suspension is that

Non vertical external forces are supported by the suspension arms

The assembly is slightly more complicated in design

The unsprung mass in lighter

The vertical size of the suspension can be made more compact

14. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

Resistance to wear

None of these

Lubrication performance

Cooling efficiency

15. The braking control type traction control system (TCS) generally operates in the speed range of

Less than 40 kmph

More than 60 kmph

Less than 20 kmph

Less than 60 kmph

16. The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be

4R²

R

2R

4R

17. The calorific value of petrol is about

42.7-43.5 MJ/kg

36.5-38.5 MJ/kg

39.4-42.5 MJ/kg

45.5-47 MJ/kg

18. It is necessary to maintain the valve clearances as they

Make the crankshaft turn smoothly

Reduce the resistance to sliding that occurs between the cam and the tappet

Allow for lengthening of the valves owing to the heat of combustion

Increase the speed at which the valves move up and down

19. The painting of automobiles is done to

All of these

Retain the characteristics of steel for long

Improve its external appearance

Prevent rust from growing on the body

20. The vehicle ride will be comfortable if

Sprang mass is kept minimum

All of these

Unsprung mass is kept minimum

Vehicle mass is kept minimum

Page 3 of 3

21. The instrument used to check specific gravity of acid in a battery is

Hygrometer

Multimeter

Anemometer

Hydrometer

22. The crankshaft of a typical inline four cylinder engine has ________ balance weights.

4

12

8

16

23. The stroke of an engine is the

Internal diameter of the cylinder

Length of the connecting rod

Distance between T.D.C. and B.D.C.

Volume of the cylinder

24. The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints

Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

Absorb the vibrations transferred from the surface of the road

None of the above

Absorb any difference in speed between the left and right wheels when the vehicle is turning

25. The auto ignition in a spark ignition engine means

Ignition induced to supplement the process of normal combustion

Ignition induced by the passage of a spark

Automatic ignition of the charge at the end of compression

Ignition of the charge before the passage of flame front

26. In petrol engines, during suction stroke, _________ is drawn in the cylinder

Only fuel

None of these

Only air

Air and fuel

27. The function of a first compression ring (top ring) is that it

Creates swirl

Increases the combustion temperature

Maintains a seal and prevents the fuel leakage

Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

28. The cetane number of a Diesel fuel is a measure of

Delay period

Volatility

Viscosity

Ignition quality

29. If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called

Detonation

Ignition

Rumble

Pre-ignition

30. The path taken by intake air is

Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders

Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders

Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders

Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders

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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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