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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 effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

2. 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

3. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

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

90

120

100

110

5. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

6. 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

7. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

8. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

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

Clearance volume

Cylinder volume

None of these

Exhaust volume

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Page 2 of 5

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

None of these

Small particles

Large particles

Sharp edged fragments

12. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 40

SAE 80

13. 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)

P.L.A.N

P.L.A.N/2

2 × P.L.A.N

P.L.A.N/4

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

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

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

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

Tractors

Trucks

Passenger cars

Matadors

17. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Carbon disulphide

Ethylene glycol

18. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Vernier caliper

Screw pitch gauge

19. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

20. Bead wires are made of

Steel

Zinc

Aluminium

Copper

Page 3 of 5

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

1.00

1.28

2.81

1.82

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

Big end

Journal

Small end

Crank arm

23. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

None of these

Vehicle speed

24. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

25. The power source for a brake booster is

Hydraulic pump

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

Electricity

Exhaust manifold pressure

26. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

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

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

30. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

Page 4 of 5

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

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

Air temperature

Exhaust gas volume

Air-fuel ratio

Air flow speed

33. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

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

1-2-3-4

1-3-4-2

1-3-2-4

1-2-4-3

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

Meshes the gears

Operates the clutch

Moves the synchronizer

Selects the synchronizer

36. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Power

Engine r.p.m.

37. 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.

38. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Extreme length of the vehicle

39. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

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

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

Page 5 of 5

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

None of these

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

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

5%

20%

15%

10%

43. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

44. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

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

175

82

65

14

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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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