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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-1

May 2, 2021

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

Incomplete combustion

Low temperature combustion

High atmospheric temperature combustion

High temperature combustion

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

Brake fades

Vapour locking occurs in the brake lines

Brake drags

Antilock braking system malfunctions

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

Automatic transmission fluid (ATF)

Gross vehicle weight (GVW)

Society of automotive engineers (SAE)

American petroleum institute (API)

4. The most commonly used power plant in automobiles is

Gas turbine

I.C. engine

Battery

None of these

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

Only fuel

None of these

Only air

Air and fuel

6. The calorific value of petrol is about

42.7-43.5 MJ/kg

45.5-47 MJ/kg

39.4-42.5 MJ/kg

36.5-38.5 MJ/kg

7. The octane rating of petrol commercially available is

100-110

95-100

85-95

110-125

8. The path taken by intake air is

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

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

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

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

9. The negative plates of a lead acid battery has

Sulphuric acid (H₂SO₄)

Lead peroxide (PbO₂)

Spongy lead (Pb)

Lead sulphate (PbSO₄)

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

Volts

Weight

Ampere hours

Amperes

Page 2 of 3

11. The main feature of Macpherson strut suspension is that

Non vertical external forces are supported by the suspension arms

The unsprung mass in lighter

The vertical size of the suspension can be made more compact

The assembly is slightly more complicated in design

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

2R

4R²

R

4R

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

12

4

16

8

14. 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 to supplement the process of normal combustion

Ignition induced by the passage of a spark

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

Volatility

Delay period

Viscosity

Ignition quality

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

Multimeter

Anemometer

Hygrometer

Hydrometer

17. 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

18. The vehicle ride will be comfortable if

Sprang mass is kept minimum

Vehicle mass is kept minimum

Unsprung mass is kept minimum

All of these

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

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

Creates swirl

Maintains a seal and prevents the fuel leakage

Increases the combustion temperature

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

Spline

Sector gear

Tie rod

Pivot

Page 3 of 3

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

L

H

I

C

22. 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

23. 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

24. The stroke of an engine is the

Length of the connecting rod

Volume of the cylinder

Internal diameter of the cylinder

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

25. 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

26. 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

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

Pre-ignition

Detonation

Ignition

Rumble

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

Resistance to wear

Cooling efficiency

Lubrication performance

None of these

29. The brake warning light warns the driver of

Air in the hydraulic system

Failure of the primary or secondary circuit of hydraulic system

Power brake failure

Water in the master cylinder

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

0.1

1.2

0.8

0.4

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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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