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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-1

May 2, 2021

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1. The vehicle ride will be comfortable if

All of these

Sprang mass is kept minimum

Unsprung mass is kept minimum

Vehicle mass is kept minimum

2. The octane rating of petrol commercially available is

85-95

110-125

100-110

95-100

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

Tie rod

Sector gear

Pivot

Spline

4. The main feature of Macpherson strut suspension is that

The vertical size of the suspension can be made more compact

The assembly is slightly more complicated in design

Non vertical external forces are supported by the suspension arms

The unsprung mass in lighter

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

Multimeter

Hygrometer

Anemometer

Hydrometer

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

Viscosity

Delay period

Ignition quality

Volatility

7. 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 40 kmph

Less than 60 kmph

8. 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

Make the crankshaft turn smoothly

Increase the speed at which the valves move up and down

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

Creates swirl

Increases the combustion temperature

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

Maintains a seal and prevents the fuel leakage

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

4R²

2R

R

4R

Page 2 of 3

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

0.1

1.2

0.8

0.4

12. The painting of automobiles is done to

All of these

Retain the characteristics of steel for long

Prevent rust from growing on the body

Improve its external appearance

13. The brake warning light warns the driver of

Air in the hydraulic system

Water in the master cylinder

Failure of the primary or secondary circuit of hydraulic system

Power brake failure

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

Ampere hours

Volts

Weight

Amperes

15. The calorific value of petrol is about

45.5-47 MJ/kg

36.5-38.5 MJ/kg

42.7-43.5 MJ/kg

39.4-42.5 MJ/kg

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

H

L

C

I

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

Pre-ignition

Rumble

Ignition

Detonation

18. The stroke of an engine is the

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

Internal diameter of the cylinder

Volume of the cylinder

Length of the connecting rod

19. The most commonly used power plant in automobiles is

Battery

Gas turbine

I.C. engine

None of these

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

Resistance to wear

None of these

Cooling efficiency

Lubrication performance

Page 3 of 3

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

Brake drags

Antilock braking system malfunctions

Vapour locking occurs in the brake lines

Brake fades

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

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.

None of the above

23. In a square type engine

Stroke length and cylinder bore are same

Two cylinders are placed horizontal and two vertical

Diameter and length of piston are same

Geometrical shape is square

24. The path taken by intake air is

Air cleaner carburettor (or throttle body) 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

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

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

16

4

8

12

26. The negative plates of a lead acid battery has

Sulphuric acid (H₂SO₄)

Spongy lead (Pb)

Lead peroxide (PbO₂)

Lead sulphate (PbSO₄)

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

Low temperature combustion

High temperature combustion

High atmospheric temperature combustion

Incomplete combustion

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 auto ignition in a spark ignition engine means

Automatic ignition of the charge at the end of compression

Ignition of the charge before the passage of flame front

Ignition induced by the passage of a spark

Ignition induced to supplement the process of normal combustion

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

None of these

Only air

Air and fuel

Only fuel

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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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