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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-1

May 2, 2021

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

Brake drags

Brake fades

Antilock braking system malfunctions

Vapour locking occurs in the brake lines

2. In a square type engine

Diameter and length of piston are same

Geometrical shape is square

Two cylinders are placed horizontal and two vertical

Stroke length and cylinder bore are same

3. The path taken by intake air is

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

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

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

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

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

Pivot

Tie rod

Sector gear

Spline

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

4

12

8

16

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

Rumble

Detonation

Ignition

Pre-ignition

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

Incomplete combustion

High atmospheric temperature combustion

High temperature combustion

Low temperature combustion

8. The octane rating of petrol commercially available is

100-110

110-125

85-95

95-100

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

Amperes

Ampere hours

Volts

Weight

10. The most commonly used power plant in automobiles is

Battery

None of these

Gas turbine

I.C. engine

Page 2 of 3

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

Less than 20 kmph

More than 60 kmph

Less than 60 kmph

Less than 40 kmph

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

Multimeter

Hydrometer

Hygrometer

Anemometer

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

R

2R

4R

4R²

14. The painting of automobiles is done to

Prevent rust from growing on the body

Retain the characteristics of steel for long

Improve its external appearance

All of these

15. The brake warning light warns the driver of

Power brake failure

Water in the master cylinder

Air in the hydraulic system

Failure of the primary or secondary circuit of hydraulic system

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

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

Creates swirl

Increases the combustion temperature

17. The calorific value of petrol is about

39.4-42.5 MJ/kg

36.5-38.5 MJ/kg

42.7-43.5 MJ/kg

45.5-47 MJ/kg

18. The negative plates of a lead acid battery has

Lead peroxide (PbO₂)

Sulphuric acid (H₂SO₄)

Lead sulphate (PbSO₄)

Spongy lead (Pb)

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

I

C

L

H

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

0.8

0.4

1.2

0.1

Page 3 of 3

21. The auto ignition in a spark ignition engine means

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

Ignition induced to supplement the process of normal combustion

22. The main feature of Macpherson strut suspension is that

The vertical size of the suspension can be made more compact

Non vertical external forces are supported by the suspension arms

The unsprung mass in lighter

The assembly is slightly more complicated in design

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

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

Make the crankshaft turn smoothly

24. The stroke of an engine is the

Length of the connecting rod

Internal diameter of the cylinder

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

Volume of the cylinder

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

None of these

Only air

Air and fuel

Only fuel

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

Ignition quality

Delay period

Viscosity

Volatility

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

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

Absorb the vibrations transferred from the surface of the road

None of the above

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

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

Automatic transmission fluid (ATF)

Society of automotive engineers (SAE)

American petroleum institute (API)

Gross vehicle weight (GVW)

29. The vehicle ride will be comfortable if

Vehicle mass is kept minimum

All of these

Unsprung mass is kept minimum

Sprang mass is kept minimum

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

None of these

Cooling efficiency

Lubrication performance

Resistance to wear

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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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