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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 Diesel engine works on

Diesel cycle

Carnot cycle

Rankine cycle

Otto cycle

2. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

3. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

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

Passenger cars

Matadors

Tractors

Trucks

5. 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

Extreme length of the vehicle

Distance between the centres of the rear tyres

6. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

None of these

Torsional vibrations

7. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Speed

Fuel consumption

8. 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

9. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Page 2 of 5

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

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

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

Gravity

13. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

14. 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

15. 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

P.L.A.N/4

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

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

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

None of these

18. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

19. 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 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 differential carrier houses differential pinion gears and side gears.

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

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Page 3 of 5

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

Ignition warning bulb

Parking light bulb

Head light bulb

Stop light bulb

22. 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

23. 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 camshaft

Belt driven by drive-shaft

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

5%

20%

15%

10%

25. The parking brake generally acts on

Front and rear wheels

Rear wheels

Propeller shaft

Front wheels

26. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

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

Maintain directional control

Compensate for wear in the steering linkage

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

Prevent uneven tyre wear

28. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

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

Improved emission

Improved fuel efficiency

Improved power output

All of these

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

1-2-3-4

1-3-4-2

1-2-4-3

1-3-2-4

Page 4 of 5

31. Bead wires are made of

Steel

Copper

Aluminium

Zinc

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

Cylinder volume

None of these

Clearance volume

Exhaust volume

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

65

175

14

82

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

110

100

120

90

35. 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

36. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

37. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Hard steering

Too much traction

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

1.28

2.81

1.00

1.82

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

Small particles

Sharp edged fragments

None of these

Large particles

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

Crank arm

Small end

Big end

Journal

Page 5 of 5

41. The fuel that detonates easily, is

Benzene

Iso-octane

N-heptane

Alcohol

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

Air temperature

Exhaust gas volume

Air flow speed

Air-fuel ratio

43. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

44. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

45. 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

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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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