Automobile Engineering Mock Test

1. A tyre is specified as P 205/75 R14. The digit 75 stands for :
(A) Radius
(B) Diameter
(C) Aspect ratio
(D) Speed rate

2. Which of the following starting drive is used in vehicle ?
(A) Bendix drive
(B) Torque tube drive
(C) Hotchkiss drive
(D) Full floating drive

3. In the fully charged condition the specific gravity of electrolyte at 15 degree Celsius is :
(A) 1.29
(B) 1.71
(C) 1
(D) 2.1

4. A battery of 100 Ali (Ampere Hour) can give :
(A) 10 A current for 10 H
(B) 2A for 5H
(C) 25 A for 4H
(D) All of the above

5. The type of suspension system used in two wheeler is :
(A) Rigid axle
(B) Mac Phersion
(C) Swinging half axle
(D) Telescopic shock absorber

6. Which of the following battery test uses hydrometer ?
(A) Open volt test
(B) Cadmium test
(C) High discharge test
(D) Specific gravity test

7. Which of the following works according to Venturi principle ?
(B) Feed pump
(C) Carburettor
(D) Injector

8. The unit of temperature in SI unit is:
(A) Kilogram
(B) Centigrade
(C) Kelvin
(D) Celsius

9. Crank case dilution is:
(A) Dilution of lubricating oil
(B) Addition of water in crank case
(C) Dilution of diesel in crank case
(D) None of these

10. The top ring on the piston is known as:
(A) Ring grove
(B) Compression ring
(C) Oil ring
(D) Scrapper ring

11. The purpose of Feeler gauge is :
(A) Measuring the small gap
(B) Measuring the length of a rod
(C) Measuring the diameter of a cylinder
(D) Measuring length of a beam

12. Viscosity of the oil is the measure of it’s :
(A) Resistance flow
(B) Velocity flow
(C) Temperature flow
(D) Current flow

13. The voltage per cell in a lead acid battery is:
(A) 1 volt
(B) 1.5 volt
(C) 8 volt
(D) 2 volt

14. The chamber angle is usually :
(A) 1/4″
(B) Between 1/2″ to 2″
(C) Between 1″ to 3’’
(D) Between 4” to 6″

15. The cylinder block of heavy engine is made of :
(A) High carbon steel
(B) Nickel or chromium steel
(C) Cast iron
(D) Medium carbon steel

16. Ohms law relates potential difference with :
(A) Time
(B) Voltage
(C) Current
(D) Power

17. The standard firing order for an in-line 6 cylinder IC engine is :
(A) 1-5-3-6-2-4
(B) 1-3-5-4-2-6
(C) 1-6-5-4-2-3
(D) 1-4-5-2-3-6

18. The dynamo in an automobile is basically :
(A) DC generator
(B) Transformer
(C) Resistance
(D) All of the above

19. The knocking tendency of spark ignition engine is reduced by:
(A) Advancing ignition timing
(B) High compression ratio
(C) Low exhaust gas temperature
(D) Adding dope like tetra ethy lead to the fuel

20. The gear ratio of camshaft and crankshaft is :
(A) 1:1
(B) 1:2
(C) 1:6
(D) 1:8

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21. The maximum temperature in the IC engine cylinder is:
(A) 700-1200°C
(B) 1000 -1500°C
(C) 2000 -2500°C
(D) 1600 -2000°C

22. Which is more viscous lubricating oil?
(A) SAE 50
(B) SAE 40
(C) SAE 70
(D) SAE 90

23. Scavenging is usually done to increase :
(A) Thermal efficiency
(B) Speed of the engine
(C) Less fuel consumption
(D) Power output

24. All the four wheel drive automobiles has :
(A) Water cooled engine
(B) Air cooled engine
(C) Four stroke engine
(D) Two differentials

25. The radiator is usually made of :
(A) Bronze
(B) Cast iron
(C) Steel
(D) Copper

26. Air standard efficiency of an IC engine depends on :
(A) Compression ratio
(B) Fuel used
(C) Velocity ratio
(D) Power ratio

27. The materials used for cylinder head are generally :
(A) Alluminium
(B) High carbon steel
(C) Mild steel
(D) Cast iron

28. Which law states that pressure remaining constant the volume of a fixed mass of gas is directly proportional to it’s absolute temperature?
(A) Boyle’s law
(B) Charle’s law
(C) Regnault’s law
(D) Joule’s law

29. The air fuel ratio of petrol engine is controlled by :
(A) Fuel injection pump
(B) Governer
(C) Injector
(D) Carburettor

30. ____________ tool is used for lightening the nuts and bolt with a specified torque.
(A) Adjustable wrench
(B) Torque wrench
(C) Pipe wrench
(D) Tubular spanner

31. “The volume sept by the piston in moving from TDC to BDC is called :
(A) Piston displacement
(B) Clearance volume
(C) Engine capacity
(D) Total volume

32. The total piston displacement of all the engine cylinders is :
(A) Engine capacity
(B) Valve capacity
(C) Fuel tank capacity
(D) Rocker arm capacity

33. A smoky blue exhaust is due to:
(A) incorrect valve adjustment
(B) incorrect tappet adjustment
(C) burning of oil in combustion chamber
(D) rich mixture in the combustion chamber

34. Engine torque is transmitted to the gear box through :
(A) Gear box
(B) Belt
(C) Chain
(D) Clutch

35. Specdometer drive is usually taken from :
(A) Fan belt
(B) Rear wheel
(C) Dynamo
(D) Front wheel

36. Free clutch pedal play in car clutches is about :
(A) 10mm
(B) 60mm
(C) 90mm
(D) 30mm

37. The specific gravity for fully charged lead acid battery is :
(A) 1.160 -1.160
(B) 1.176-1.185
(C) 1.126-1.135
(D) 1.220-1.230

38. The bellows type valve, the bellows are filled with liquid such as:
(A) Kerosene
(B) Diesel
(C) Oil
(D) alcohol or acetone

39. A compressed air break system is a type of :
(A) mechanical brake
(B) hand brake
(C) vaccum assisted brake
(D) friction brake

40. Multi oil indicate :
(A) SAE 20W-50
(B) SAE 120
(C) SAE 90

41. The coil spring in wish bone suspension placed between the :
(A) Upper wish bone and the cross member
(B) Shock absorber and the cross member
(C) Lower wish bone and the cross member
(D) Three wish bones

42. The packing brake generally acts on:
(A) Propeller shaft
(B) Front wheels
(C) Rear wheels
(D) Front and rear wheel

43. The rating of diesel fuel is given by :
(A) 1.5
(B) octane number
(C) cetane number
(D) 2PLN

44. The central gear of an epi cyclic gear set is called a:
(A) Internal gear
(B) Planet gear
(C) Ring gear
(D) Sun gear

45. The torque increased in a vehicle obtained by :
(A) Decreasing power
(B) Decreasing speed
(C) Decreasing fuel consumption
(D) Increasing fuel consumption

46. The condition that causes vapour locking in a brake system :
(A) An excessively high engine speed on a downhill road
(B) Over cooling of the brake during high speed driving
(C) Keeping the vehicle without use for an extended period
(D) Overheating of the fluid due to frequent brake application

47. The oil pump is driven by the :
(A) cam shaft
(B) primary shaft
(C) main shaft
(D) crank shaft directly

48. Less or uneven pressure of air in the wheels shall result in :
(A) smooth steering
(B) hard steering
(C) front axle shifted
(D) loose tie rod

49. The oil or fluid used in torque converter is:
(A) SAE -90
(B) SAE 300
(C) Mineral oil
(D) Brake oil

50. Valve ring compressor is used to ——————— the valve springs while removing or installing the engine valve.
(A) Depress
(B) Compress
(C) Brittlencas
(D) Toughness

51. The fully charged battery is brought to a temperature of :
(A) 90°F
(B) 45°C
(C) 120°F
(D) 80°F

52. The transmission in which various speeds are obtained automatically are known as:
(A) Constant power transmission
(B) High torque transmission
(C) Low speed transmission
(D) Automatic transmission

53. The rotary motion of the crank shaft is in turn used to drive the ——————— for generating power.
(A) Motor
(B) Transformer
(C) Engine
(D) Generator

54. Baffles are provided on engine to:
(A) Reduce fuel consumption
(B) Improve engine performance
(C) Improve heat transfers rate
(D) Reduce the knocking effect

55. Which of the following statement is true statement?
(A) Heavier fly wheel is needed in two stroke engine
(B) Lighter flywheel is needed in four stroke engine
(C) Low thermal efficiency in four stroke engine
(D) Volumetric efficiency is less in two stroke engine

56. The tacometer is used to measure the:
(A) Engine oil viscosity
(B) Engine compression
(C) Engine temperature
(D) Engine rpm

57. During combustion, fuel and water particles escape from the combustion chamber into the crank chamber, which dilute the lubricating oil contained in the oil sump is known as :
(A) Crank case dilution
(B) Crank case burning
(C) Crank case explosion
(D) Crank case ventilation

58. The order or sequence in which the firing takes place in different cylinders of a multi cylinder engine is called :
(A) Air-fuel ratio
(B) Power ratio
(C) Fuel ratio
(D) Firing order

59. When the top of the wheel is fitted inward, then it is called :
(A) Kins pin inclination
(B) Positive camber
(C) Caster angle
(D) Negative camber

60. The main function of a suspension is to:
(A) Correct the effect of steering automatically
(B) Wheel alignment is not distributed during driving
(C) Steering wheel can driven a suitable amount of steering force
(D) Absorb vibration and impact forces from the road surface

61. The type of rear axle used in a car and light commercial vehicles are:
(A) Semi —floating axle
(B) Full floating axle
(C) Three-quarter floating axle
(D) None of these

62. The function of gear box in an automobile is to:
(A) Vary speed
(B) Vary torque
(C) To disconnect the road wheels from the engine when desired
(D) Permanent speed reduction

63. Which instrument is used to measure specific gravity?
(A) Hydrometer
(B) Thermometer
(C) Barometer
(D) Tacometer

64. ———————— are provided in the clutch smooth engagement.
(A) Coil spring
(B) Cauhion spring
(C) Torsion spring
(D) Spring basic disc

65. A ring gear is provided around the engine flywheel :
(A) To start the engine using self starter
(B) To operate the valves
(C) To maintain better engine speed
(D) To maintain the water pump speed

66. —————— serves to adjust the length of the propeller shaft when demanded by the rear axle movement.
(A) Universal joint
(B) Cap joints
(C) Corner joint
(D) Slipjoint

67. The torque available at the contact between wheels and rod is :
(A) Tractive effect
(B) Gear effect
(C) Brake effect
(D) axle effect

68. The Rear wheels should follow in the tracks of front wheels in a parallel position is called:
(A) Turning radius
(B) Uniform motion of wheel
(C) Negotiating turn
(D) Tracking

69. Which of the following is false statement?
(A) Thermal efficiency is low in petrol engine
(B) Thermal efficiency is high in diesel engine
(C) Petrol engine works on constant volume cycle
(D) Compression ratio varies from 6.1 to 9.1 in Diesel engine

70. The basic frame work of an engine is :
(A) cylinder head
(B) oil sump
(C) cylinder block
(D) connecting rod

71. The oil sump is made of :
(A) cast iron
(B) alluminium alloy
(C) zinc sheet
(D) pressed steel sheet

72. While smoke from a diesel engine can be expected during :
(A) Start up or idling
(B) High load operation
(C) High Speed operation
(D) All of the above

73. The term BTDC stands for :
(A) Below Top Dead Centre
(B) Before Top Dead Centre
(C) Back Top Dead Centre
(D) Balance Top Dead Centre

74. The advantages of tube less tyre over tube type tyre is :
(A) slow air leakage
(B) chances of running flat is leas
(C) better fuel efficiency
(D) all of these

75. Differential gear box oil is usually renewed after :
(A) 6000 km
(B) 4000 km
(C) 1500 km
(D) 2500-6000 km

76. An over inflated tyre will wear the tread most near the :
(A) Centre
(B) Corner
(C) Edges
(D) none of these

77. Piston, compression rings and made of :
(A) spring steel
(B) Alluminium
(C) copper alloy
(D) cast iron

78. The power to be transmitted to the road wheels at varied lengths and varied angles is :
(A) axle shaft
(B) primary shaft
(C) bevel shaft
(D) propeller shaft

79. In an automobile the wheels convert rotary motion into :
(A) Reciprocating motion
(B) Downward motion
(C) Upward motion
(D) Longitudinal one

80. For maximum engine speed and power, additional fuel must be supplied —-—————— help in providing additional fuel for maximum power.
(A) chock valve
(B) Throttle valve
(C) Additional nozzle
(D) Economizer valve

81. In otto cycle engines the knocking tendency is reduced by :
(A) Adding dope like tetraethy load to the fuel
(B) High exhaust temperature
(C) Less compression ratio
(D) High compression ratio

82. Bendix drive is generally known as:
(A) Front axle drive
(B) Rear axle drive
(C) Bendix gear drive
(D) Inertia drive

83. The front and rear wheel, tyre pressure of Ambassador car is:
(A) 15 psi— 18 psi
(B) 20 psi — 25 psi
(C) 24 psi — 25 psi
(D) 26 psi — 28 psi

84. Brake bleeding is the process of removing —-——————— from the system.
(A) Brake oil
(B) Air
(C) Vacuum
(D) Excess pressure

85. ————————— is the conventional material for engine cylinder heads and block.
(A) Alluminium
(B) Steel
(C) Vacuum
(D) Cast iron

86. The type of wheels preffered in sport vehicles are:
(A) Wire wheel
(B) Copper alloy wheel
(C) Alluminium alloy wheel
(D) Disc wheel

87. In modern car the head light dimming switch is mounted on the :
(A) Dash board
(B) Steering column
(C) Side board
(D) Flour board