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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. Tachometer in a vehicle measures

Speed

Fuel consumption

Engine r.p.m.

Distance

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

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

Belt driven by drive-shaft

Belt driven by camshaft

Belt driven by crankshaft

Chain driven by crankshaft

4. The specific gravity of Diesel is about

0.95

0.65

0.75

0.85

5. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Hard steering

6. 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

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

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

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

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

Crank arm

Journal

Big end

Small end

Page 2 of 5

11. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

12. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

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

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

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

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

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

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

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

Meshes the gears

Moves the synchronizer

Selects the synchronizer

Operates the clutch

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

1.00

2.81

1.28

1.82

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

Improved fuel efficiency

All of these

Improved emission

Improved power output

18. The power source for a brake booster is

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

Electricity

Exhaust manifold pressure

Hydraulic pump

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

Air-fuel ratio

Air temperature

Exhaust gas volume

Air flow speed

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

100

110

120

90

Page 3 of 5

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

65

14

82

175

22. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

23. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

24. The specific gravity of petrol is about

0.75

0.95

0.85

1.25

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

Ignition warning bulb

Stop light bulb

Head light bulb

Parking light bulb

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

Exhaust volume

None of these

Clearance volume

Cylinder volume

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

28. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

29. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Torsional vibrations

Vehicle speed

30. The Diesel engine works on

Diesel cycle

Otto cycle

Rankine cycle

Carnot cycle

Page 4 of 5

31. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Volatility

Cetane number

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

Maintain directional control

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

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

34. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

35. 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/2

P.L.A.N/4

P.L.A.N

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

Tractors

Trucks

Passenger cars

Matadors

37. Bead wires are made of

Aluminium

Steel

Copper

Zinc

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

5%

20%

10%

15%

39. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Screw pitch gauge

Feeler gauge

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

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

Page 5 of 5

41. Engine misfiring is likely to result from

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

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

None of these

Sharp edged fragments

Large particles

Small particles

43. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

44. 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

Distance between the centres of the rear tyres

Extreme length of the vehicle

45. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Fuel consumption

Distance

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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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