2. The purpose of the dynamo in an automobile is to
Correct : B. Continually recharge the battery
3. In a vehicle if there is no king pin offset
Correct : A. Starting steering effort will be high
4. In a four stroke engine, for the combustion of one litre of fuel, the volume of air required would be approximately
Correct : E. 9 - 10 cu-m
5. The number of revolutions per km for a free rolling tyre are less than that calculated from its static radius. This difference in number of revolutions is due to
Correct : C. either of (A) and (B) above
6. The reaction time of an average driver from recognizing an obstacle is taken as
Correct : A. 0.5 to 1.7 seconds
7. The fuel is injected into the cylinder in Diesel engine when the piston is
Correct : B. Approaching T.D.C. during compression stroke
8. Dilution of lubricating oil is caused by
Correct : E. Fuels
9. The function of oil scraper rings is to
Correct : A. Lubricate cylinder walls
10. Speedometer drive is usually taken from
Correct : D. Front wheel
11. The gear ratio in the differential unit of a passenger car is of the order of
Correct : A. 3 ; 1
12. Exhaust gas leakage into the cooling system is most likely to be due to a defective
Correct : A. Cylinder head gasket
13. The frame provided for supporting the units of chasis and the body, in case of Tata vehicles is
Correct : A. Cross member - type frame
14. Which one of the following is not a part of the hydraulic braking system?
Correct : B. Steering mechanism
15. The process of super charging is meant for
Correct : B. increasing density of intake air
16. Diesel fuel as compared to petrol is
Correct : A. More difficult to ignite
17. A ring gear is provided around the engine fly-wheel
Correct : B. To start the engine using self-starter
18. The part of the vehicle which holds the passengers and the cargo to be transported, is known as
Correct : C. Hull
19. Wax is applied on car body because
Correct : D. Any of the above
20. Synthetic rubber is made of
Correct : B. Butadiene
21. Fuel pump for diesel engine is
Correct : B. mechanically operated
22. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
Correct : A. supercharging
23. Highest useful compression ratio is an indicator of
Correct : D. knocking of a fuel under specified conditions in a standard engine
24. Which one of the following is antifriction bearing?
Correct : A. Ball bearing
25. The ignition of the charge in spark ignition engine before spark occurs in spark plug, is known as
Correct : B. pre-ignition
26. Which of the following lamp in a car will have the least wattage
Correct : D. Ignition warning light
27. The boiling point of Diesel fuel may be expected to be in the range
Correct : D. 220 °C to 375 °C
28. Odometer is
Correct : B. An instrument for distance measurement
29. For lubrication of which part of an automobile only grease is used
Correct : D. Tie rod
30. In case of four cylinder in line engine, the number of firing stroke (s) in one revolution of crank is
Correct : C. 2
31. Diesel engines are also known as
Correct : B. C.I. engines
32. High sulphur content of petrol affects the engine performance by
Correct : D. All of the above
33. Which part is not common between the petrol and diesel engines
Correct : D. Fuel injector
34. The problem of exhaust emissions can be handled by
Correct : D. All of the above
35. The heating value of petrol is
Correct : B. 10,000-10400 kcal/kg
36. The king pin inclination is usually
Correct : B. Between 2? and 5?
37. Which of the following can be used for starting a 1000 H.P. diesel engine?
Correct : D. Compressed air
38. In a scooter engine the cylinder is lubricated by
Correct : E. Mixing lubricating oil in the fuel
39. Which one of the following is independent of fuel constituents, combustion chamber design, temperature and pressure of compressed charge
Correct : B. Pre-ignition
40. Engine pistons are generally made of aluminium alloy because
Correct : E. It is lighter
41. Springs are made of
Correct : E. Spring steel
42. The breaking up of a liquid into fine droplets by spraying is called
Correct : C. Atomisation
43. Which fuel has maximum resistance to detonation
Correct : C. Isoctave
44. A square type engine
Correct : B. Has cylinder bore equal to stroke length
45. For balancing single cylinder engine a counter weight is added to
Correct : A. Crankshaft
46. In an engine shows lack of power on running the probable cause could be
Correct : E. Any of the above
47. If the end mixture of S.I. engine is having low temperature and long igition delay, then knocking will
Correct : B. decrease
48. The maximum pressure generated by the fuel injection pump does not reach the nozzle end immediately. The lag is due to
Correct : B. pressure wave in the oil column
49. Which company is not engaged in the manufacture of tyres in India
Correct : B. Appollo
50. If the cut-off is decreased, the efficiency of Diesel cycle
Correct : D. approaches to Otto cycle
51. The size of the engine intake valve is
Correct : D. Smaller than that of exhaust valve
52. To avoid chances of maisalignment the bearing generally used is
Correct : D. Taper roller bearing
53. In the cam the distance between the base circle and the nose is called
Correct : B. Lift
54. Which one of the following does not form a part of the fuel supply system for a Diesel engine?
Correct : E. Air cleaner
55. In case of four cylinder opposed cylinder engines, the firing order is
Correct : C. 1-4-3-2
56. Magneto ignition system is used in
Correct : A. S.I. engines
57. Cross wire grooves on tyres
Correct : A. Absorb shocks due to road unevenness
58. Automobiles in India generally do not use battery with a voltage of
Correct : C. 18 volts
59. Loss of engine compression can result from
Correct : D. Worn rings or cylinder wall
60. Which vechicle is generally provided with four wheel drive
Correct : C. Jeep
61. Which air cleaner is considered to be most effective in Diesel engines?
Correct : C. Oil bath type
62. The starter motor is driven by
Correct : E. Gear drive
63. Which region of an automobile tyre is subjected to greatest flexing action?
Correct : B. Side wall
64. The time before actual fuel injection and pump olunger starts to pump fuel, is known as
Correct : A. injection lag
65. The inlet value of a four stroke I.C. engine, in actual practice, should close
Correct : B. slightly after the end of suction stroke
66. Ignition system used in scooters is
Correct : A. magneto system
67. In a petrol engine, the gas which does not burn and passes out without transformation is
Correct : C. Nitrogen
68. In case of clutch if the springs become weak, the remedy lies in
Correct : D. Replacing the springs
69. If the water level in engine is maintained low, the likely consequence could be
Correct : D. All of the above
70. At the first sight a petrol engine is identified by
Correct : C. Spark plug
71. Aluminium cylinder blocks require
Correct : D. Cast iron liners
72. 1000 mm diameter tyre is generally used on
Correct : D. Trucks
73. Engine starter motor is
Correct : B. D.C. series motor
74. Which one of the followings is used in C.I. engines?
Correct : B. injector
75. Failure of an engine to start even though it turns over at normal cranking speed could be due to
Correct : B. Defective ignition
76. The substance which when added in a small proportion into petrol reduces knocking is
Correct : D. tetra ethyl lead
77. In a diesel engine the pipe carrying fuel from fuel pump to nozzle is made of
Correct : D. Steel
78. The percentage of heat released from fuel air mixutre, in an internal combustion engine which is converted into useful work is roughly
Correct : B. 20 - 25 percent
79. The knocking C.I engines is characterised by the sudden auto-ignition of the mixture
Correct : C. at the very beginning of the combustion process
80. The braking system provided on trains is
Correct : B. Vaccum
81. The need for installing new piston rings is determined by checking
Correct : B. The clearance between cylinder and piston rings
82. In a Diesel engine, during combustion the pressure may increase at a range of
Correct : A. 55-75 atm
83. A smoky blue exhaust is due to
Correct : A. Burning of oil in combustion chamber
84. Differential gear box oil is usually renewed after
Correct : B. 2500 - 6000 km
85. The tendency of a petrol engine to knock increases by
Correct : A. Turbo-charging
86. In S.I. engine if the spark plug deposit indicates black coating of soot, it therefore indicates that the engine has been generally operating on
Correct : A. Too rich mixture
87. Ignition quality of petrol is expressed by
Correct : B. Octane no
88. Petrol engines are also known as
Correct : A. S.I. Engines
89. The air gap between the central electrode and ground electrode of a spark plug is approximately
Correct : D. 0.1 cm to 0.06 cm
90. In commercial vehicle layouts engine is located forward, rear or under floor mainly to
Correct : E. Have better weight distribution
91. When considerable material must be removed to clean up a cylinder bore, the cylinder should be
Correct : D. Reamed
92. Wheel base of a vehicle is the
Correct : B. Distance between front and rear axles
93. In a vehicle the probable cause for hard steering could be
Correct : E. Any of the above
94. An opposed cylinder engine has
Correct : C. Two crankshafts and two camshafts
95. For car speed upto 100 kmph the mean deceleration in m/s2 taken as
Correct : C. 2.5
96. Which motor cycle has maximum power rating?
Correct : D. Yamaha
97. Two speed reverse gear arrangement is generally provided in case of
Correct : E. Tractors
98. Worn out carburettor jets are likely to cause
Correct : B. Excess fuel consumption
99. The firing order in the case of a four-cylinder I.C. engine (inline) is given as