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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-6

August 8, 2021

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Page 1 of 5

1. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Carbon disulphide

Ethylene glycol

2. The octane number of compressed natural gas (CNG) is

120

110

100

90

3. The function of an alternator in an automobile is to

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

4. The negative terminal post on the top of a battery is

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

5. The specific gravity of acid in a fully charged battery is generally

1.00

1.82

2.81

1.28

6. The advantage of the fuel injection system over the carburettor system is

Improved power output

Improved fuel efficiency

All of these

Improved emission

7. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is

14

82

65

175

8. The minimum parking brake force is generally ___________ of gross vehicle mass (GVM).

10%

5%

15%

20%

9. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Octane number

Volatility

10. Which of the following bulb in a car will have the least wattage?

Head light bulb

Ignition warning bulb

Parking light bulb

Stop light bulb

Page 2 of 5

11. The brake pedal during ABS operation

Is pushed upward forcefully

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

12. The correct way to rectify an imbalanced wheel is to

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

13. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

14. The connecting rod lower end is connected to the relevant ________ of crankshaft.

Journal

Big end

Crank arm

Small end

15. The fuel that detonates easily, is

N-heptane

Alcohol

Iso-octane

Benzene

16. Which of the following symptom is caused as a result of brake disc run out?

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Localized wearing of the brake pads

Judder during braking

17. Bead wires are made of

Copper

Steel

Zinc

Aluminium

18. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

19. A heat treated glass generally used in automobiles bursts into ________ upon cracking,

Small particles

None of these

Large particles

Sharp edged fragments

20. Two speed reverse gear arrangements is generally provided in case of

Trucks

Matadors

Passenger cars

Tractors

Page 3 of 5

21. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

22. Incorrect steering axis inclination (S.A.I.) causes

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

23. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

24. The parking brake generally acts on

Front wheels

Front and rear wheels

Propeller shaft

Rear wheels

25. The forced fed lubrication system means that the oil is delivered to the engine by

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

26. The specific gravity of Diesel is about

0.85

0.65

0.75

0.95

27. The firing order for an inline four cylinder I.C. engine is

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

28. The gear shift lever requires two separate motions to shift gears, and the first movement

Selects the synchronizer

Operates the clutch

Moves the synchronizer

Meshes the gears

29. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

30. When the piston is at T.D.C., the volume above the piston in the combustion chamber is the

Cylinder volume

None of these

Clearance volume

Exhaust volume

Page 4 of 5

31. The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

P.L.A.N

32. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

33. In a hydraulic power steering system, the power steering pump is driven by a

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

34. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

35. The power source for a brake booster is

Hydraulic pump

Electricity

Exhaust manifold pressure

The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold

36. The information provided by the oxygen (O₂) sensor to the feedback control system is about the

Air-fuel ratio

Air flow speed

Air temperature

Exhaust gas volume

37. The Diesel engine works on

Diesel cycle

Carnot cycle

Rankine cycle

Otto cycle

38. The basic purpose of providing caster angle on wheels is to

Bring the road contact of the tyre under the point of load

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

39. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

Jerky starts

None of these

40. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

Page 5 of 5

41. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

42. Which one of the following statement correctly describes the construction of a bevel gear type differential?

The differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

The left side gear and the differential carrier rotate in constant unison.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

43. If the valve clearances are excessively large, the problem that can arise is

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

44. The specific gravity of petrol is about

0.75

0.95

1.25

0.85

45. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

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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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