1. Morse Test in multicylinders is used to determine
Correct : B. Mechanical efficiency
2. In case of tractors the springs provided on rear wheel are
Correct : A. No spring is provided
3. Which one of the following is the trouble due to clutch?
Correct : E. All of the above
4. Diesel fuel in a cylinder of CL engine will ignite when temperature of compressed air is
Correct : A. 1000?C
5. The function of condenser in the ignition circuit of an SI engine is
Correct : C. to avoid arcing at the contact breaker and to cause faster decay of primary current
6. Which of the following vehicle does not have battery?
Correct : C. Vespa scooter
7. The device in the cooling system that increses the boiling point of the water in the system is called
Correct : B. Pressure cap
8. In a diesel engine a clogged nozzle could result in
Correct : E. Any of the above
9. For a spark plug M 14 x 1.25 the last figure 1.25 stands for
Correct : B. Pitch of plug thread
10. The knocking in S.I. engines is characterised by sudden auto-ignition of the change
Correct : B. farthest away from the spark plug
11. Ignition coil is used to
Correct : D. Step up voltage
12. Radiator tubes are generally made of
Correct : A. Brass
13. Increasing the temperature of intake air in an I.C. engine will
Correct : B. decrease the efficiency
14. The Diesel fuel pump is designed to supply fuel
Correct : D. In sufficient quantity in accordance with the engine speed
15. The phenomenon by which a fuel catches fire without external flame is known as
Correct : D. auto-ignition
16. Air resistance to a car at 20 kmph is R. The air resistance at 40 kmph would be
Correct : C. R2
17. The knocking in C.I. engine can be prevented if the first element of the fuel and air is having
Correct : C. high density
18. Exhaust gas leakage into the cooling system is most likely be due to defective
Correct : A. Cylinder head gasket
19. The value overlap in case of four stroke petrol engine is approximately
Correct : A. 30?
20. Driving wheel hearings in automobiles are always
Correct : C. Anti-friction bearings
21. The level of electroyte in automobiles battery should be
Correct : E. 10 - 15 mm above top of plates
22. The exhaust value remains open approximately for
Correct : D. 235?
23. As the number of cylinders on multi-cylinder engines increases the power to weight ratio
Correct : B. Decreases
24. Which of the following part is not needed on spark ignition engines using magneto ignition?
Correct : A. Battery
25. Aluminium cylinder blocks require
Correct : D. Cast iron liners
26. In case of Diesel engines into the engine cylinder during suction stroke
Correct : C. only air is drawn
27. Too early ingition in SI engine will cause
Correct : A. pinking, power loss
28. Castor is
Correct : C. either of (A) and (B) above
29. Ignition advance is expressed in terms of
Correct : D. Any of the above
30. The most popular firing order in case of cylinder in-line IC engine is
Correct : E. 1-3-4-2
31. The quantity of oil delivered by injection pump in diesel engine is controlled by
Correct : C. rotation of control helix
32. As a rule, before the pistons are removed it is necessary to remove the
Correct : A. Piston rings
33. Deposit of carbon in the exhaust system
Correct : C. Will increase back pressure
34. In case of a Petrol engine, the spark plug should produce the spark
Correct : B. slightly before the end of compression stroke
35. In four cylinder engines the ignition advance depends on
Correct : D. (A) and (B) only
36. In an automobile engine the temperature of the piston will be more at
Correct : E. The crown of the piston
37. If a lead acid battery is fully charged at specific gravity of 1.28 and fully discharged at specific gravity of 1.11 then at specific gravity of 1.19, the battery will be
Correct : D. less than 50% charged
38. Generally speaking for better efficiency of IC engine the valves must
Correct : D. open before the beginning of a stroke and close after the end of a stroke
39. The inlet value remains open approximately for
Correct : D. 235?
40. Maximum danger of ol dilution by fuel in an engine occurs when
Correct : D. Choke circuit is cut in for too long a period
41. In the fuel injection pumps for Diesel engine the effective pressure strokes of the plungers in the fuel injection pump are regulated by means of a
Correct : D. Control rack
42. A laminated glass upon cracking
Correct : C. Sandwitched layer traps the fragments
43. In an internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is
Correct : D. 30%
44. In case of oil bath type air cleaner, the oil sediments formed by the dust must be removed
Correct : D. After about 5000 km
45. Which one of the followings is used in S.I. engines?
Correct : A. spark plug
46. In a S.I. engine the intake valve closes
Correct : A. 35? to 80? after BDC
47. In a Diesel engine the duration between the time of injection and the time of ignition is called
Correct : B. Delay period
48. Poor compression in a two stroke engine cannot be due to
Correct : A. Leaky valves
49. The angle between the cord and the centre line of the tread is called
Correct : C. crown angle
50. A stratified charged engine provides
Correct : A. air fuel mixture of different air-fuel ratios at various places on the combustion chamber
51. In a S.I. engine burned white deposit on spark plug with molten globules indicates that the engine has been generally operating on
Correct : E. Too lean mixture
52. Gum content of petroleum fuels is mainly due to
Correct : C. oxidation of unsaturated bydrocarbons
53. A spark voltage needs a voltage of
Correct : E. 5000 - 15000 V.
54. CFR engine is a
Correct : D. variable compression ratio engine
55. During discharge of a battery, the sulphuric acid in the electrolyte is replaced by
Correct : B. Water
56. The spark advance in SI engine is adjusted to obtain maximum pressure
Correct : A. 10 - 12? past TDC
57. In a four wheel drive the number of gear boxes is
Correct : A. 2
58. Air injection in case of S.I. engine refers to injection of
Correct : B. Liquid fuel only
59. The instrument used to check the state of charge of a battery is
Correct : C. Hydrometer
60. Which fully charged the specific gravity of acid in a battery is usually
Correct : A. 1.28
61. The number of exhaust manifolds in a V-8 engine
Correct : D. Two
62. In the fuel injection pump of a Diesel engine, the fuel injection timing is adjusted by adjusting the
Correct : D. Rotation plunger
63. Which of the following is a front wheel drive vehicle?
Correct : D. Maruti
64. In an Ambassador car the number of forward gears provided is
Correct : D. 4
65. Which of the following hydrocarbon has ring structure?
Correct : D. Naphthene
66. Brake lining is mounted on
Correct : A. Brake shoe
67. Water in lubricating oil aids in
Correct : C. Formation of solution
68. In a Diesel engine, the temperature of gases under full load may be of the order of
Correct : E. 500-550?C
69. In transmission system if the reverse gear slips out, the probable cause could be
Correct : E. Any of the above
70. The device for smoothening out the power inpulses from the engine is called
Correct : C. Flywheel
71. In which case the air fuel ratio is expected to be the highest?
Correct : B. Gas turbine
72. Too rich mixture for a S.I. engine means air : fuel ratio of about
Correct : E. 10 ; 1
73. During idling in a CI engine, the air fuel ratio may be of the order of
Correct : A. 30
74. In automobile ignition system contact breaker is used for
Correct : A. Opening and closing the primary circuit
75. The spots from a car body are removed by
Correct : D. Special cleaning agents
76. The ignition coil acts as
Correct : D. A step up transformer
77. If brake wheels get locked before the vehicle stops, the vehicle is said to be
Correct : D. Skidding
78. Theoretically air required for the combustion of one kg of fuel is
Correct : E. 14.5 kg
79. Quality of diesel oil can be expressed in terms of cetane number and also
Correct : B. API gravity
80. Automobile gears are generally made of
Correct : B. Alloy steel
81. In a S.I. engine high air velocity through air hom may be of the order of
Correct : A. 100 m/s
82. In automobile, probable cause for ineffective brakes could be
Correct : D. Any of above
83. If the oil level in the oil pan of the engine is maintained above the gauge mark, the likely damage it may cause is
Correct : D. All of the above
84. A two stroke engine is generally preferred to a four stroke engine because
Correct : C. Its size is smaller
85. High gum content in petrol may result in
Correct : C. clogging of carburettor
86. Cetane number of a Diesel fuel is measure of
Correct : D. Delay period
87. Efficiency of an IC engine is normally of the order of
Correct : A. 30-35%
88. For flow of petrol from fuel tank to the carburettor, the fuel system includes
Correct : D. A fuel pump
89. Connecting rods are generally of the following form
Correct : A. Forged I section
90. Piston compression rings are made of
Correct : E. Cast iron
91. Cetane number of Diesel oil normally available in market is in the range.
Correct : E. 45 -- 50
92. If a spark plug does not fire, the probable cause could be
Correct : B. Carbonized porcelain
93. Grease cannot be used as lubricant for the lubrication of
Correct : E. Transmission
94. Boiling range of kerosene is
Correct : C. 150 to 300?C
95. The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the cylinder from the crank-case, is known as
Correct : C. scavenging
96. In a four stroke SI engine the inlet valve opens
Correct : D. 10? before TDC and closes 50? after BDC
97. Which one of the following is not a part of the chassis?
Correct : D. Passenger seats
98. The most widely used brakes are operted
Correct : B. Hydraulically
99. Which part of the engine is directly driven by the starting motor?
Correct : A. Flywheel
100. The fuel lines connecting the fuel injection pump individual elements with corresponding injector should have