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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 capacity of a battery is usually expressed in terms of

Volts

Weight

Ampere hours

Amperes

2. The calorific value of petrol is about

36.5-38.5 MJ/kg

39.4-42.5 MJ/kg

42.7-43.5 MJ/kg

45.5-47 MJ/kg

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

Only fuel

Air and fuel

Only air

None of these

4. The path taken by intake air is

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

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

Antilock braking system malfunctions

Vapour locking occurs in the brake lines

Brake drags

Brake fades

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

L

I

C

H

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

4

12

8

16

8. 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

Increase the speed at which the valves move up and down

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

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

Multimeter

Hydrometer

Anemometer

Hygrometer

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

None of the above

Absorb the vibrations transferred from the surface of the road

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

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

Page 2 of 3

11. The auto ignition in a spark ignition engine means

Ignition induced by the passage of a spark

Ignition induced to supplement the process of normal combustion

Automatic ignition of the charge at the end of compression

Ignition of the charge before the passage of flame front

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

Pivot

Sector gear

Tie rod

Spline

13. The octane rating of petrol commercially available is

95-100

110-125

85-95

100-110

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

4R

2R

4R²

R

15. The stroke of an engine is the

Length of the connecting rod

Volume of the cylinder

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

Internal diameter of the cylinder

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

Creates swirl

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

Increases the combustion temperature

17. The main feature of Macpherson strut suspension is that

The unsprung mass in lighter

The assembly is slightly more complicated in design

The vertical size of the suspension can be made more compact

Non vertical external forces are supported by the suspension arms

18. 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

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

1.2

0.1

0.4

0.8

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

Viscosity

Volatility

Delay period

Ignition quality

Page 3 of 3

21. In a square type engine

Geometrical shape is square

Stroke length and cylinder bore are same

Diameter and length of piston are same

Two cylinders are placed horizontal and two vertical

22. The most commonly used power plant in automobiles is

Gas turbine

Battery

None of these

I.C. engine

23. The negative plates of a lead acid battery has

Lead peroxide (PbO₂)

Lead sulphate (PbSO₄)

Spongy lead (Pb)

Sulphuric acid (H₂SO₄)

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

Detonation

Rumble

Pre-ignition

Ignition

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

High temperature combustion

Incomplete combustion

Low temperature combustion

High atmospheric temperature combustion

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

Automatic transmission fluid (ATF)

Gross vehicle weight (GVW)

American petroleum institute (API)

Society of automotive engineers (SAE)

27. The vehicle ride will be comfortable if

Sprang mass is kept minimum

Vehicle mass is kept minimum

All of these

Unsprung mass is kept minimum

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

Cooling efficiency

Resistance to wear

Lubrication performance

None of these

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

Less than 60 kmph

Less than 40 kmph

Less than 20 kmph

More than 60 kmph

30. The painting of automobiles is done to

Retain the characteristics of steel for long

Improve its external appearance

All of these

Prevent rust from growing on the body

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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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