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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

Engine r.p.m.

Fuel consumption

Speed

Distance

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

100

110

90

120

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

15%

10%

5%

20%

4. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

5. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

7. 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

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

Parking light bulb

Stop light bulb

Head light bulb

Ignition warning bulb

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

Trucks

Matadors

Passenger cars

Tractors

10. 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 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.

Page 2 of 5

11. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

12. The brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

13. 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

14. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

15. Bead wires are made of

Copper

Zinc

Steel

Aluminium

16. The parking brake generally acts on

Front wheels

Propeller shaft

Rear wheels

Front and rear wheels

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

14

65

82

175

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

Moves the synchronizer

Selects the synchronizer

Meshes the gears

Operates the clutch

19. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

20. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 70

SAE 30

Page 3 of 5

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

22. The fuel that detonates easily, is

Alcohol

Benzene

N-heptane

Iso-octane

23. Odometer is an instrument used for measurement of

Fuel consumption

Engine r.p.m.

Power

Distance

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

2.81

1.00

1.82

1.28

25. 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

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

Sharp edged fragments

Small particles

Large particles

None of these

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

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

Gravity

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

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Localized wearing of the brake pads

29. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

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

1-2-3-4

1-3-2-4

1-3-4-2

1-2-4-3

Page 4 of 5

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

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

Exhaust volume

Cylinder volume

Clearance volume

None of these

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

Air-fuel ratio

Air temperature

Air flow speed

Exhaust gas volume

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

Improved emission

Improved power output

Improved fuel efficiency

All of these

36. The specific gravity of petrol is about

0.85

1.25

0.75

0.95

37. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

38. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

Jerky starts

None of these

39. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Engineering scale

Screw pitch gauge

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

Journal

Small end

Big end

Crank arm

Page 5 of 5

41. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

42. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

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

Fouling of spark plug by gasoline

Overheating of the engine

None of these

Incomplete valve closure

44. 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

P.L.A.N/4

2 × P.L.A.N

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

None of these

Of the same size as the positive terminal post

Larger than 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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