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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 70

SAE 30

SAE 40

SAE 80

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

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

Tendency to assume toe-out orientation

3. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

4. 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

Smaller than the positive terminal post

None of these

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

6. The power source for a brake booster is

Electricity

Exhaust manifold pressure

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

Hydraulic pump

7. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

None of these

Steam engines

8. 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

9. Bead wires are made of

Aluminium

Copper

Steel

Zinc

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

90

110

120

100

Page 2 of 5

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

12. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

Jerky starts

None of these

13. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Extreme length of the vehicle

14. The Diesel engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

15. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Vernier caliper

Engineering scale

16. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

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

2.81

1.28

1.00

1.82

18. 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

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

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

None of these

Sharp edged fragments

Large particles

Small particles

Page 3 of 5

21. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

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

Cylinder volume

Clearance volume

Exhaust volume

None of these

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

Matadors

Tractors

Trucks

Passenger cars

25. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

26. 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; each pinion gear meshes with a different side gear.

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.

27. The fuel that detonates easily, is

N-heptane

Iso-octane

Alcohol

Benzene

28. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

29. 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

2 × P.L.A.N

P.L.A.N/4

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

Page 4 of 5

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

20%

10%

15%

5%

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

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

Chain driven by crankshaft

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

Gravity

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

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

Small end

Journal

Big end

Crank arm

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

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

36. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Freon-12

Ammonium chloride

37. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

39. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Fuel consumption

Speed

40. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Volatility

Octane number

Page 5 of 5

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

82

14

65

175

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

43. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

Vapours lock in the fuel only

44. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Hard steering

Uneven tyre wear

45. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Power

Engine r.p.m.

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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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