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?