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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 valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Screw pitch gauge

Engineering scale

2. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

None of these

3. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

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

Air-fuel ratio

Air flow speed

Exhaust gas volume

Air temperature

5. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front tyres

6. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

7. The specific gravity of Diesel is about

0.75

0.85

0.65

0.95

8. Bead wires are made of

Copper

Aluminium

Steel

Zinc

9. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

10. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

Vehicle speed

None of these

Page 2 of 5

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

1.28

1.82

2.81

1.00

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

13. The specific gravity of petrol is about

1.25

0.75

0.95

0.85

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

100

120

110

90

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

Journal

Crank arm

Big end

Small end

16. 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

P.L.A.N/2

P.L.A.N

2 × P.L.A.N

17. 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

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

Sharp edged fragments

Small particles

Large particles

None of these

19. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

20. The parking brake generally acts on

Front wheels

Propeller shaft

Front and rear wheels

Rear wheels

Page 3 of 5

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

Tractors

Matadors

Passenger cars

Trucks

22. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

24. 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

25. 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

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

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

27. 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

28. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

29. 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

30. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

Page 4 of 5

31. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

32. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 40

SAE 80

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

Maintain directional control

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

34. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

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

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

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

Moves the synchronizer

Operates the clutch

Meshes the gears

Selects the synchronizer

37. The fuel that detonates easily, is

Iso-octane

Benzene

Alcohol

N-heptane

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

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

39. Tachometer in a vehicle measures

Speed

Fuel consumption

Distance

Engine r.p.m.

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

Head light bulb

Parking light bulb

Stop light bulb

Ignition warning bulb

Page 5 of 5

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

All of these

Improved emission

Improved power output

Improved fuel efficiency

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

Localized wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

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

20%

15%

5%

10%

44. 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.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

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

65

14

82

175

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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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