Quiznetik

Automobile Engineering | Set 3

1. In order to engage securely and prevent dragging the clearance between release bearing and release collar in a clutch is usually

Correct : D. 2 - 3 mm

2. Which of the following action reduces the life of tyre?

Correct : D. All of the above

3. Loss of engine compression can result from

Correct : C. Worn out rings

4. Excess oil consumption in engine may be due to

Correct : E. Any of the above

5. A hot plug has a

Correct : A. Heat dam

6. Acid used in automobile battery is

Correct : B. Sulphuric acid

7. Diesel engine as compared to petrol engines require

Correct : A. Biggenr flywheels

8. In a Diesel engine the fuel injection pressure is usually in the range

Correct : E. 100 to 170 atm

9. In case of petrol engine, pre-ignition of the charge during compression stroke is

Correct : B. possible

10. Common causes for excessive oil consumption include

Correct : E. High speed and worn engine

11. Two SI engines run at same speed and develop same power but have different compression ratio. The engine with higher compression ratio will have its ignition advance

Correct : B. less than

12. Exhaust valve temperature is about

Correct : C. 500?C

13. Which oil is more viscous

Correct : D. SAE 80

14. Commonly used antifeeze solution in automobiles is

Correct : E. Gloycol

15. The heating value of diesel is approximately

Correct : C. 10,000 kcal/kg

16. For S.I. engine carburettor the float is usually made of

Correct : D. Either (A) or (B)

17. The exhaust value of a four stroke I.C. engine should open

Correct : C. slightly before the end of expansion stroke

18. In case of petrol engines, into the engine cylinder during suction stroke

Correct : A. air and fuel is drawn

19. Which of the following is a diesel engined vehicle?

Correct : E. None of the above

20. In case of friction clutch the coefficient of friction is expected to be

Correct : A. 0.4 to 0.5

21. The octane rating of petrol commercially available is usually

Correct : E. 85 - 90

22. In a typical medium speed 4-stroke cycle diesel engine, the inlet value

Correct : A. Opens at 20? before TDC and closes at 35? after BDC

23. The advanctage of stratified charge engine is

Correct : D. All of the above

24. Accumulation of rust and scale in the engine cooling system will cause

Correct : B. Overheating

25. The centrifugal advance mechanism is located

Correct : C. In the distributor

26. In a Diesel engine the function of a fuel injector is

Correct : E. To spray atomized fuel in the cylinder

27. The angle during which both the inlet and exhaust valves remain open simultaneously, is known as

Correct : C. value overlap

28. The angle of camber is usually

Correct : B. Between

29. The valve is opened as the cam lobe on the cam raises the

Correct : B. Valve lifter

30. The device used to reduce the exhaust noise is known as

Correct : D. Muffler

31. The firing order in case of four cylinder in-line engines is uaually

Correct : E. Either (B) or (C)

32. The power developed in four stroke I.C. engine, for the same engine speed and cylinder volume, as compared to that of a two stroke engine is

Correct : C. one half

33. Power assisted brakes are often provided on

Correct : D. heavy duty vehicles

34. The magneto in an automobile is basically

Correct : D. D.C. generator

35. Mixing of fuel and air in case of a diesel engine occurs in

Correct : B. Engine cylinder

36. The minimum cranking speed in petrol engines is

Correct : C. 60 - 80 rpm

37. The function of a governor in automobile is to

Correct : E. Limit the speed

38. The term master cylinder is associated with

Correct : A. Braking system

39. Ignition advance in S.I. engine is not the direct function of

Correct : D. load on engine

40. As carbon accumulates in a cylinder it causes an increase in

Correct : E. Effective compression ratio

41. The speed of the engine is increased or decreased by operating

Correct : A. Throttle valve

42. Ethyl fluid is used as

Correct : B. To increase octane rating of fuel

43. Which tractor has an air cooled engine

Correct : E. Eicher

44. The number of cylinders in an Ambassador car is

Correct : A. 4

45. Engine oil is usually renewed after

Correct : A. 2500 - 6000 km

46. By supercharging

Correct : D. Thermal efficiency of the engine can be improved

47. Automobile radiator is filled with

Correct : E. Soft water

48. Brake shoes are made of

Correct : D. Either (A) or (B)

49. Theoretical correct air-fuel ratio for tetrol engine is

Correct : D. 15 ; 1

50. When IHP and FHP on an engine are known, we can calculate

Correct : D. Brake horse power

51. Magneto ignition system is used in scooters and motor cycles because

Correct : B. it is less bulky and requires less maintenance

52. In case of automobile moving under normal road conditions the amount of fuel injected is proportional to

Correct : A. speed of vehicle

53. As a general rule if facing on the friction disc are worn down to the rivet heads

Correct : E. The friction disc should be replaced

54. The disadvantage of stratified charge engine is

Correct : D. All of the above

55. The device which is used for atomising and vapourising the petrol fuel and mixing it with the air in varying proportions, to suit the changing operating conditions of the engine, is known as

Correct : C. carburettor

56. As the gap between the electrodes of the spark plug increases

Correct : B. voltage required for sparking increases

57. In order to easily start the precombustion chamber diesel engine, in the early cold morning

Correct : C. Glow plug is used

58. Pick up the wrong statement

Correct : C. SI engines are quality governed engines

59. While starting a engine the starter pinion meshes with

Correct : B. Engine flywheel ring gear

60. The efficiency of mechanical brakes is usually

Correct : B. 60 - 70 percent

61. Engine dynamo is usually driven by

Correct : A. V-belt drive

62. In actual practice, the inlet value of a four stroke I.C. engine should open

Correct : C. slightly before the start of the suction stroke

63. Gudgeon pins are made of

Correct : B. Hardened and ground steel

64. In a four stroke four cylinder petrol engine, the speed of distributor shaft is

Correct : A. Half the engine speed

65. Instead of values, ports are used in case of

Correct : D. Two-stroke I.C. engines

66. In triptane rating the non-knocking reference fuel is

Correct : A. leaded 2,3,3 trimethyl butane

67. Which type of pump is preferred for pumping lubricating oil in automobile

Correct : D. Gear pump

68. In cars a temperature indicating instrument is usually provided which indicates the temperature of

Correct : C. Jacket cooling water

69. Which one of the following is not the trade name of tractor in India?

Correct : A. Standard

70. The brake pipes in hydraulic brake systems are made of

Correct : C. Steel

71. The maximum temperature in an I.C. engine is of the order of

Correct : A. 2000-2500?C

72. In automobile ignition system, a distributor is mounted on

Correct : B. high voltage side

73. The purpose of crankcase ventilation is to

Correct : D. Remove vaporized water and fuel

74. In a S.I. engine, when most economical mixture is supplied, the colour of exhaust flame is expected to be

Correct : D. Dark blue to reddish-yellow

75. Which one of the following is a wrong staement?

Correct : D. In case of four stroke I.C. engines, the exhaust gases are driven out from engine cylinder by fresh charge of the fuel entering the cylinder

76. The castor is called positive when

Correct : A. the top of the king pin axis is inclined to the rear of the vehicle

77. In a four stroke S.I engine the exhaust valve usually opens

Correct : B. 35? to 60? before BDC

78. For a four stroke engine the maximum power output is reached at an air quantity

Correct : E. Deficient by 5 to 10 percent

79. Which of the following is not incorporated in scooters?

Correct : C. Fuel pump

80. The exhaust gases are driven out from engine cylinder by the fresh charge of the fuel enter in the cylinder, in case of

Correct : D. Two-stroke I.C. engines

81. The freezing temperature of ordinary petrol is

Correct : A. ? 30?C to ? 50?C

82. The function of governor is

Correct : D. To maintain constant speed at varying loads

83. Air supply in case of Diesel engines is usually

Correct : B. About 40 percent surplus

84. The capacity of a battery is usually expressed in terms of

Correct : D. Ampere hours

85. Oil pan is attached

Correct : C. To the bottom of the cylinder block

86. Dynamo in automobile is a

Correct : B. shunt generator

87. In an engine the probable cause for low oil pressure cannot be

Correct : D. Use of heavy engine oil

88. In a four stroke engine, each cylinder has

Correct : E. Two valves

89. An automobile tyre will wear rapidly in case

Correct : E. Any of the above

90. About 5% of fuel in the lubricating oil lessen the ability to lubricate by about

Correct : A. 30%

91. In forced feed lubrication system the device used to guard against excessive oil pressure is known as

Correct : E. Relief valve

92. In actual practice, the exhaust value of a four stroke I.C. engine should close

Correct : C. slightly after the end of exhaust stroke

93. Latex

Correct : A. A milky juice of rubber

94. The pressure of air for braking in case of heavy duty trucks in usually of the order of

Correct : D. 4 to 7 atm

95. The operation of removing trapped air from hydraulic braking system is known as

Correct : E. Bleeding

96. For faultless operation of hydraulic braking system

Correct : D. There should be minimum amount of trapped air

97. If the first element of the fuel and C.I. air is having high temperature and a short ignition delay, then knocking will

Correct : B. decrease

98. Noisy brakes indicate

Correct : E. Any of the above

99. Steering gear

Correct : D. Any of the above

100. In a ball bearing which is more harder than the other parts?

Correct : E. All are equally hardened