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

1-2-4-3

1-3-2-4

1-3-4-2

1-2-3-4

2. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Maintain constant engine speed

3. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

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

15%

20%

10%

5%

5. Which of the following oil is more viscous?

SAE 70

SAE 40

SAE 30

SAE 80

6. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

None of these

7. 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

8. The effect of having excess camber is

Too much traction

Uneven tyre wear

Hard steering

Excessive steering alignment torque

9. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Torsional vibrations

Jerky starts

10. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

Page 2 of 5

11. Bead wires are made of

Zinc

Aluminium

Copper

Steel

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

Trucks

Tractors

Passenger cars

Matadors

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

Small particles

Large particles

None of these

Sharp edged fragments

14. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

15. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

16. The power source for a brake booster is

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

Exhaust manifold pressure

Electricity

Hydraulic pump

17. 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 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.

The drive shafts are splined to the differential carrier.

18. 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/2

P.L.A.N/4

P.L.A.N

2 × P.L.A.N

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

None of these

Clearance volume

Exhaust volume

Cylinder volume

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Page 3 of 5

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

Air flow speed

Exhaust gas volume

Air temperature

Air-fuel ratio

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

23. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

24. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Fuel consumption

Power

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

26. 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

27. The specific gravity of petrol is about

0.85

0.75

0.95

1.25

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

1.28

1.82

1.00

2.81

30. 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

Page 4 of 5

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

Crank arm

Journal

Small end

Big end

32. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Screw pitch gauge

Engineering scale

33. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ethylene glycol

Ammonium chloride

34. The Diesel engine works on

Diesel cycle

Rankine cycle

Carnot cycle

Otto cycle

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

Ignition warning bulb

Stop light bulb

Parking light bulb

Head light bulb

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

Overheating of the engine

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

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

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

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

Selects the synchronizer

Moves the synchronizer

Meshes the gears

Operates the clutch

39. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

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

14

175

82

65

Page 5 of 5

41. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

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

110

100

120

90

43. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

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

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

Smaller than the positive terminal post

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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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