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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. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 70

SAE 40

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

65

175

14

82

3. 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

4. The fuel that detonates easily, is

Alcohol

N-heptane

Iso-octane

Benzene

5. Odometer is an instrument used for measurement of

Power

Distance

Engine r.p.m.

Fuel consumption

6. 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/4

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

7. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

Limit the power

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

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

9. 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

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

Journal

Crank arm

Small end

Big end

Page 2 of 5

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

Small particles

None of these

Sharp edged fragments

Large particles

12. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

13. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

15. 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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

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

Exhaust gas volume

Air flow speed

Air temperature

Air-fuel ratio

17. 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

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

1.28

2.81

1.82

1.00

19. The effect of having excess camber is

Uneven tyre wear

Hard steering

Excessive steering alignment torque

Too much traction

20. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

Page 3 of 5

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

22. Bead wires are made of

Copper

Zinc

Aluminium

Steel

23. 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

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

20%

10%

5%

15%

25. 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

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

120

110

100

90

27. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

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

Operates the clutch

Meshes the gears

Moves the synchronizer

Selects the synchronizer

29. 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 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.

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

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

None of these

Page 4 of 5

31. The specific gravity of Diesel is about

0.85

0.95

0.75

0.65

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

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

33. The parking brake generally acts on

Front and rear wheels

Rear wheels

Front wheels

Propeller shaft

34. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

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

The pressure created by the oil pump

Gravity

None of these

Splashing action of the crankshaft

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

Improved fuel efficiency

All of these

Improved power output

Improved emission

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

1-3-4-2

1-3-2-4

1-2-3-4

1-2-4-3

38. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

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

Matadors

Trucks

Tractors

Passenger cars

40. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Page 5 of 5

41. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

42. The specific gravity of petrol is about

1.25

0.95

0.75

0.85

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Rapid wearing of the brake pads

44. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

45. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

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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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