AUTOMOBILE ENGINEERING- PAGE 2
AUTOMOBILE ENGINEERING- PAGE 2
1. The cetane rating of Diesel fuel is in the order of
A) 25 B) 45 C) 70 D) 90
Ans: B
2. A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
A) 400 cm3 B) 600 cm3 C) 1200 cm3 D) 2400 cm3
Ans: B
3. In comparison with a radial tyre, one advantage of a bias ply tyre is
A) Longer life B) Lower rolling resistance
C) Smoother ride at low speeds D) None of these
Ans: C
4. The cetane number of a Diesel fuel is a measure of
A) Volatility B) Viscosity C) Ignition quality D) Delay period
Ans: C
5. The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
A) Camber B) Caster C) Toe in D) Toe out
Ans: A
6. If the valve clearances are excessively large, the problem that can arise is
A) Overheating of the engine B) Incomplete valve closure
C) Fouling of spark plug by gasoline D) None of these
Ans: D
7. For the same maximum pressure and temperature
A) Diesel cycle is more efficient than Otto cycle
B) Otto cycle is more efficient than Diesel cycle
C) Both Otto cycle and Diesel cycle are equally efficient
D) None of the above
Ans: A
8. Problems caused by the wheel imbalance are
A) Hard steering and hard ride
B) Poor acceleration and hard steering
C) Steering wheel vibrations and uneven tyre wear
D) Poor acceleration and reduced fuel efficiency
Ans: C
9. The torque converter uses ____________ to transfer torque.
A) Air B) Automatic Transmission Fluid (ATF)
C) Gears D) Steel belt
Ans: B
10. The composition of the electrolyte in a fully charged battery is that
A) The electrolyte is pure distilled water
B) The electrolyte is pure sulphuric acid
C) The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
D) The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
Ans: C
11. The air gap between the central electrode and ground (or side) electrode of a spark plug is around
A) 0.2 mm B) 0.5 mm C) 1 mm D) 1.5 mm
Ans: C
12. The specific gravity of acid in a fully charged battery is generally
A) 1.00 B) 1.28 C) 1.82 D) 2.81
Ans: B
13. In radial tyres
A) One ply layer runs diagonally one way and another layer runs diagonally the other way
B) All plies run parallel to one another and vertical to tyre bead
C) Inner tubes are always used
D) None of these
Ans: B
14.. The power source for a brake booster is
A) Exhaust manifold pressure
B) Electricity
C) The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
D) Hydraulic pump
Ans: C
15. The most commonly used Supplementary Restraint System (SRS) component is
A) Seat belt B) Brake C) Airbag D) Steering
Ans: C
16. It is necessary to maintain the valve clearance as they
A) Reduce the resistance to sliding that occurs between the cam and the tappet
B) Allow for lengthening of the valves owing to the heat of combustion
C) Increase the speed at which the valves move up and down
D) Make the crankshaft turn smoothly
Ans: B
17. Wheel base of a vehicle is the
A) Distance between the centres of the front and rear wheels
B) Distance between the centres of the front tyres
C) Distance between the centres of the rear tyres
D) Extreme length of the vehicle
Ans: A
18. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
A) Indicator diagram B) Axial force diagram
C) Valve timing diagram D) None of these
Ans: C
19. The octane rating of petrol commercially available is
A) 85-95 B) 95-100 C) 100-110 D) 110-125
Ans: A
20. The instrument used to check specific gravity of acid in a battery is
A) Hydrometer B) Hygrometer
C) Anemometer D) Multimeter
Ans: A
A) 25 B) 45 C) 70 D) 90
Ans: B
2. A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
A) 400 cm3 B) 600 cm3 C) 1200 cm3 D) 2400 cm3
Ans: B
3. In comparison with a radial tyre, one advantage of a bias ply tyre is
A) Longer life B) Lower rolling resistance
C) Smoother ride at low speeds D) None of these
Ans: C
4. The cetane number of a Diesel fuel is a measure of
A) Volatility B) Viscosity C) Ignition quality D) Delay period
Ans: C
5. The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
A) Camber B) Caster C) Toe in D) Toe out
Ans: A
6. If the valve clearances are excessively large, the problem that can arise is
A) Overheating of the engine B) Incomplete valve closure
C) Fouling of spark plug by gasoline D) None of these
Ans: D
7. For the same maximum pressure and temperature
A) Diesel cycle is more efficient than Otto cycle
B) Otto cycle is more efficient than Diesel cycle
C) Both Otto cycle and Diesel cycle are equally efficient
D) None of the above
Ans: A
8. Problems caused by the wheel imbalance are
A) Hard steering and hard ride
B) Poor acceleration and hard steering
C) Steering wheel vibrations and uneven tyre wear
D) Poor acceleration and reduced fuel efficiency
Ans: C
9. The torque converter uses ____________ to transfer torque.
A) Air B) Automatic Transmission Fluid (ATF)
C) Gears D) Steel belt
Ans: B
10. The composition of the electrolyte in a fully charged battery is that
A) The electrolyte is pure distilled water
B) The electrolyte is pure sulphuric acid
C) The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
D) The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
Ans: C
11. The air gap between the central electrode and ground (or side) electrode of a spark plug is around
A) 0.2 mm B) 0.5 mm C) 1 mm D) 1.5 mm
Ans: C
12. The specific gravity of acid in a fully charged battery is generally
A) 1.00 B) 1.28 C) 1.82 D) 2.81
Ans: B
13. In radial tyres
A) One ply layer runs diagonally one way and another layer runs diagonally the other way
B) All plies run parallel to one another and vertical to tyre bead
C) Inner tubes are always used
D) None of these
Ans: B
14.. The power source for a brake booster is
A) Exhaust manifold pressure
B) Electricity
C) The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
D) Hydraulic pump
Ans: C
15. The most commonly used Supplementary Restraint System (SRS) component is
A) Seat belt B) Brake C) Airbag D) Steering
Ans: C
16. It is necessary to maintain the valve clearance as they
A) Reduce the resistance to sliding that occurs between the cam and the tappet
B) Allow for lengthening of the valves owing to the heat of combustion
C) Increase the speed at which the valves move up and down
D) Make the crankshaft turn smoothly
Ans: B
17. Wheel base of a vehicle is the
A) Distance between the centres of the front and rear wheels
B) Distance between the centres of the front tyres
C) Distance between the centres of the rear tyres
D) Extreme length of the vehicle
Ans: A
18. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
A) Indicator diagram B) Axial force diagram
C) Valve timing diagram D) None of these
Ans: C
19. The octane rating of petrol commercially available is
A) 85-95 B) 95-100 C) 100-110 D) 110-125
Ans: A
20. The instrument used to check specific gravity of acid in a battery is
A) Hydrometer B) Hygrometer
C) Anemometer D) Multimeter
Ans: A
21. The stroke of an engine is the
A) Volume of the cylinder B) Length of the connecting rod
C) Internal diameter of the cylinder D) Distance between T.D.C. and B.D.C.
Ans: D
22. The engine oil viscosity is defined by ________ ratings.
A) Automatic Transmission Fluid (ATF)
B) Society of Automotive Engineers (SAE)
C) Gross Vehicle Weight (GVW)
D) American Petroleum Institute (API)
Ans: B
23. The function of a first compression ring (top ring) is that it
A) Increases the combustion temperature
B) Creates swirl
C) Maintains a seal and prevents the fuel leakage
D) Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
Ans: D
24. Thinner is added to the paint in order to
A) Make pigments and resin mix easily B) Make paint film hard
C) Optimise its viscosity D) None of these
Ans: C
25. The capacity of a battery is usually expressed in terms of
A) Volts B) Amperes C) Weight D) Ampere hours
Ans: D
26. In a square type engine
A) Geometrical shape is square
B) Diameter and length of piston are same
C) Two cylinders are placed horizontal and two vertical
D) Stroke length and cylinder bore are same
Ans: D
27. A Traction Control System (TCS) in automobiles controls the
A) Vibrations on the steering wheel
B) Engine power during acceleration
C) Torque that is transmitted by the tyres to the road surface
D) Stopping distance in case of emergency
Ans: C
28. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
A) Cooling efficiency B) Resistance to wear
C) Lubrication performance D) None of these
Ans: C
29. If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called
A) Detonation B) Ignition
C) Pre-ignition D) Rumble
Ans: C
30. The vehicle ride will be comfortable if
A) Unsprung mass is kept minimum B) Sprang mass is kept minimum
C) Vehicle mass is kept minimum D) All of these
Ans: A
31. The condition that results in large quantities of HC emission is
A) High temperature combustion
B) Incomplete combustion
C) Low temperature combustion
D) High atmospheric temperature combustion
Ans: B
A) Volume of the cylinder B) Length of the connecting rod
C) Internal diameter of the cylinder D) Distance between T.D.C. and B.D.C.
Ans: D
22. The engine oil viscosity is defined by ________ ratings.
A) Automatic Transmission Fluid (ATF)
B) Society of Automotive Engineers (SAE)
C) Gross Vehicle Weight (GVW)
D) American Petroleum Institute (API)
Ans: B
23. The function of a first compression ring (top ring) is that it
A) Increases the combustion temperature
B) Creates swirl
C) Maintains a seal and prevents the fuel leakage
D) Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
Ans: D
24. Thinner is added to the paint in order to
A) Make pigments and resin mix easily B) Make paint film hard
C) Optimise its viscosity D) None of these
Ans: C
25. The capacity of a battery is usually expressed in terms of
A) Volts B) Amperes C) Weight D) Ampere hours
Ans: D
26. In a square type engine
A) Geometrical shape is square
B) Diameter and length of piston are same
C) Two cylinders are placed horizontal and two vertical
D) Stroke length and cylinder bore are same
Ans: D
27. A Traction Control System (TCS) in automobiles controls the
A) Vibrations on the steering wheel
B) Engine power during acceleration
C) Torque that is transmitted by the tyres to the road surface
D) Stopping distance in case of emergency
Ans: C
28. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
A) Cooling efficiency B) Resistance to wear
C) Lubrication performance D) None of these
Ans: C
29. If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called
A) Detonation B) Ignition
C) Pre-ignition D) Rumble
Ans: C
30. The vehicle ride will be comfortable if
A) Unsprung mass is kept minimum B) Sprang mass is kept minimum
C) Vehicle mass is kept minimum D) All of these
Ans: A
31. The condition that results in large quantities of HC emission is
A) High temperature combustion
B) Incomplete combustion
C) Low temperature combustion
D) High atmospheric temperature combustion
Ans: B
32. The compression ratio at which the detonation starts is known as
A) Detonating compression ratio B) Optimum ratio C) Preignition ratio D) HUCR
Ans: D
33. In a carburettor, when the choke is applied, the fuel comes out from
A) Acceleration part B) Auxiliary jet C) Main jet D) Idle jet
Ans: C
34. The phenomenon by which the engine continuing to run even after the ignition is turned off is called
A) Run over B) Knocking C) Dieseling D) Run-in
Ans: C
35. The end of a philips type screw driver is
A) Flat blade B) With four grooves C) Fluted end D) Slab head
Ans: B
36. The fluctuation of engine speed during a cycle depends upon
A) Speed of flywheel B) Speed of piston C) Weight of crankshaft D) Mass of flywheel
Ans: D
37. The stroke is increased when the
A) Connecting rod lengthened B) Piston is shortened C) Crank throw is lengthened D) Piston pin shortened
Ans: B
38. The type of fuel injector nozzles used with pre combustion chamber engines are
A) Pintle type B) Hole type C) Pinax type D) Pneumatic type
Ans: A
39. Identify the one which is not a cold starting device in diesel engines
A) Chemical spray B) Heater plugs C) Aneroids D) Decompression devices
Ans: C
40. A component which is employed to avoid overheating of ignition coil
A) Contact breaker B) Capacitor C) Iron core D) Ballast resistor
Ans: D
41. Vacuum advance mechanism provide ignition advance according to
A) Fuel consumption B) Engine speed C) Engine load D) Ignition timing
Ans: C
42. Spark plug having white insulator tip indicates
A) Retarded ignition B) Incorrect dwell C) Very high secondary voltage D) Over advanced ignition
Ans: D
43. A component used for accurate timing of electronic fuel injection due to its high accuracy and long term reliability, is
A) Hall effect sensor B) Pulse generator C) Thyratron D) CDI system
Ans: A
44. A fully discharge battery have its positive plates covered with
A) PbO 2 B) Pb C) PbH 2 O D) PbSO 4
Ans: D
45. Number of batteries can be charged at a time using
A) Constant voltage charging B) Constant current charging C) Booster charging D) Trickle charging
Ans: B
46. In an alternator the magnetic field is produced in the
A) Commutator B) Stator C) Rotor D) Housing
Ans: C
47. The stator of an alternator have
A) One winding B) Three windings C) Two windings D) Four windings
Ans: B
48. Pick out the one which is not an inertia drive
A) Folo thru drive B) Rubber spring type drive C) Dyer drive D) Standard Bendix drive
Ans: C
49. “ISAD” stands for
A) Integrated Starter Alternator Damper
B) Intelligent Starting And Detachment
C) International System of Automotive Designs
D) Indian Society for Automobile Designs
Ans: A
50. For a stoichiometric air fuel mixture, the excess of air consumed by the engine will be equals
A) 0.5 B) 1.0 C) 1.5 D) 0.95
Ans: B
A) Detonating compression ratio B) Optimum ratio C) Preignition ratio D) HUCR
Ans: D
33. In a carburettor, when the choke is applied, the fuel comes out from
A) Acceleration part B) Auxiliary jet C) Main jet D) Idle jet
Ans: C
34. The phenomenon by which the engine continuing to run even after the ignition is turned off is called
A) Run over B) Knocking C) Dieseling D) Run-in
Ans: C
35. The end of a philips type screw driver is
A) Flat blade B) With four grooves C) Fluted end D) Slab head
Ans: B
36. The fluctuation of engine speed during a cycle depends upon
A) Speed of flywheel B) Speed of piston C) Weight of crankshaft D) Mass of flywheel
Ans: D
37. The stroke is increased when the
A) Connecting rod lengthened B) Piston is shortened C) Crank throw is lengthened D) Piston pin shortened
Ans: B
38. The type of fuel injector nozzles used with pre combustion chamber engines are
A) Pintle type B) Hole type C) Pinax type D) Pneumatic type
Ans: A
39. Identify the one which is not a cold starting device in diesel engines
A) Chemical spray B) Heater plugs C) Aneroids D) Decompression devices
Ans: C
40. A component which is employed to avoid overheating of ignition coil
A) Contact breaker B) Capacitor C) Iron core D) Ballast resistor
Ans: D
41. Vacuum advance mechanism provide ignition advance according to
A) Fuel consumption B) Engine speed C) Engine load D) Ignition timing
Ans: C
42. Spark plug having white insulator tip indicates
A) Retarded ignition B) Incorrect dwell C) Very high secondary voltage D) Over advanced ignition
Ans: D
43. A component used for accurate timing of electronic fuel injection due to its high accuracy and long term reliability, is
A) Hall effect sensor B) Pulse generator C) Thyratron D) CDI system
Ans: A
44. A fully discharge battery have its positive plates covered with
A) PbO 2 B) Pb C) PbH 2 O D) PbSO 4
Ans: D
45. Number of batteries can be charged at a time using
A) Constant voltage charging B) Constant current charging C) Booster charging D) Trickle charging
Ans: B
46. In an alternator the magnetic field is produced in the
A) Commutator B) Stator C) Rotor D) Housing
Ans: C
47. The stator of an alternator have
A) One winding B) Three windings C) Two windings D) Four windings
Ans: B
48. Pick out the one which is not an inertia drive
A) Folo thru drive B) Rubber spring type drive C) Dyer drive D) Standard Bendix drive
Ans: C
49. “ISAD” stands for
A) Integrated Starter Alternator Damper
B) Intelligent Starting And Detachment
C) International System of Automotive Designs
D) Indian Society for Automobile Designs
Ans: A
50. For a stoichiometric air fuel mixture, the excess of air consumed by the engine will be equals
A) 0.5 B) 1.0 C) 1.5 D) 0.95
Ans: B
51. Charcoal canister is used to absorb
A) Hydro carbon B) Fuel vapour C) Water vapour D) Emissions
Ans: B
52. In petrol engines; the three way catalytic converter, the first converter controls
A) CO B) HC C) NO X D) Particulate Matter
Ans: C
53. Doubling the engine cylinder diameter increases the piston thrust by
A) 2 times B) 4 times C) 8 times D) 6 times
Ans: B
54. The firing order of a six cylinder engine is
A) 1 – 3 – 5 – 6 – 2 – 4 B) 1 – 3 – 5 – 2 – 4 – 6
C) 1 – 3 – 2 – 6 – 4 – 5 D) 1 – 5 – 3 – 6 – 4 – 2
Ans: A
55. The distance between TDC to BDC, in degree
A) 180 B) 90
C) 360 D) 45
Ans: A
56. The needle valve of the carburettor is closed by means of a
A) Spring B) Tickler
C) Float D) Throttle
Ans: C
57. Increase in the plate area of a battery cell increases
A) The voltage B) The specific gravity
C) The resistance D) The capacity
Ans: D
58. Chemical condition of the battery plates can be identified by
A) High Discharge test B) Cadmium test
C) Life test D) Sulphation test
Ans: B
59. The cut out relay is not essential in alternators because current flow due to fall in voltage below that of the battery is not allowed by
A) Commutator B) Third brush
C) Rectifier D) Electromagnetic regulator
Ans: C
60. The distance from the gasket seat to the end of the threads of a spark plug, is called
A) Reach B) End clearance
C) Shoulder height D) Plug clearance
Ans: A
61. Engine valves are closed by means of
A) Rocker arm B) Tappet
C) Valve guide D) Spring
Ans: D
62. In a distributor type fuel pump, the injection timing is controlled by adjusting
A) Rotor speed B) Anti-Dribble valve
C) Cam ring D) Plunger stroke
Ans: C
63. The purpose of a governor in an engine is to
A) Limit speed
B) Limit the power
C) Limit the fuel economy
D) Limit the fuel cutoff
Ans: A
64. Pick out the Engine indicator which does not have any inertia effect.
A) Electrical type B) Optical type
C) Mechanical type D) Hydraulic type
Ans: B
65. The vibration damper on a crank shaft of an engine, reduces the
A) Longitudinal vibrations
B) Sequential vibrations
C) Transverse vibrations
D) Torsional vibrations
Ans: D
66. The angle through which the wheel turns to sustain the side forces, is called
A) Slip angle
B) Thrust angle
C) Steering axis inclination
D) Set back angle
Ans: A
67. The ratio of tyre section height to the tyre section width is called
A) Aspect ratio B) Ply rating ratio
C) Offset ratio D) Shoulder ratio
Ans: A
68. The decrease in the effectiveness of brakes with prolonged application is called
A) Skidding B) Bleeding
C) Fading D) Slipping
Ans: C
69. In a car, the pillar onto which the front door latches and the rear door is hinged is called
A) B pillar B) C pillar
C) A pillar D) D pillar
Ans: A
70. The suspension link connecting the vehicle body at one end and the live axle beam at the other end is called
A) Torsion bar B) Wishbone link
C) Trailing arm D) Panhard rod
Ans: D
71. A heavy goods vehicle consisting of a tractor and a semi-trailer is called
A) Station wagon B) Articulated vehicle
C) Coupe with coach D) Van truck
Ans: B
72. If the engine is mounted completely inside the drivers cabin, that type chassis is called
A) Conventional control type
B) Fully inside type
C) Engine forward type
D) Full forward control type
Ans: D
73. Defects in vehicle frame can be identified by checking with
A) Laser beam B) Level rod
C) Plumb line D) Bevel protractor
Ans: C
74. Clutch drag is a trouble experienced due to
A) Excessive free pedal play
B) Weak clutch springs
C) Worn-out clutch facings
D) Worn-out clutch splines
Ans: A
75. The oil used for gear box lubrication is
A) SAE 120 B) SAE 90
C) SAE 180 D) SAE 160
Ans: B
76. Rzeppa joint is an example of
A) Hooke’s joint
B) Constant velocity joint
C) Variable velocity joint
D) Slip joint
Ans: B
77. Final drive mechanism of a vehicle consist of
A) Differential unit
B) Sungear and axle shafts
C) Axle shaft and hub
D) Crownwheel and pinion
Ans: D
78. In hotchkiss drive rear axle mechanism, the torque reaction is taken up by
A) Universal joints B) Shackle
C) Springs D) Axle casing
Ans: C
79. Torsion bar in suspension system takes only
A) Longitudinal stress B) Lateral stress
C) Driving thrust D) Shear stress
Ans: D
80. Trailing link suspension is an example of
A) Live axle suspension B) Hydrostatic suspension
C) Independent suspension D) De Dion suspension
Ans: C
81. The positive castor in the wheels results in a natural tendency to
A) toe-in
B) toe-out
C) roll-in
D) decrease the effort to turn the steering wheel
Ans: A
82. The ratio between side force sustained by a wheel and slip angle is called
A) Camber force B) Self righting torque
C) Pneumatic trail D) Cornering power
Ans: D
83. Wheel tramp is a trouble caused by
A) Wheel bearing tight B) Incorrect kingpin inclination
C) Incorrect castor D) Incorrect tie-in
Ans: C
84. In a tyre, the term “ply rating” indicates
A) Aspect ratio B) Number of plies
C) Thread numbering D) Rated strength
Ans: D
85. The tyre sipes helps to
A) Increase traction B) Increase tyre life
C) Increase cornering effort D) Increase speed
Ans: A
86. Antilock Brake System works on the principle of
A) Channeling of fluids B) Frictional stability
C) Weight transferring D) Pressure modulation
Ans: D
87. The shape of reflector used in head lamp of an automobile is
A) Round B) Parabolic
C) Spherical D) Hyperbolic
Ans: B
88. The instrument used to indicate the engine RPM at any instant is called
A) Odometer B) Speedometer
C) Tachometer D) Oscilloscope
Ans: C
89. In an air brake system, the valve meant to control the intensity of braking is called
A) Unloader valve B) Brake valve
C) Slack valve D) Metering valve
Ans: B
90. An epicyclic gear train is used in
A) Over drive B) torque convertor
C) CVT D) Freewheel unit
Ans: A
91. The device used to reduce the exhaust noise is known as
A) Exhaust pipe B) Exhaust manifold
C) Tail pipe D) Muffler
Ans: D
92. As carbon accumulates in a cylinder it causes an increase in
A) Clearance volume B) Compression ratio
C) Piston displacement D) Volumetric efficiency
Ans: B
93. Radiator tubes are generally made of
A) Steel B) Aluminium
C) Cast iron D) Brass
Ans: D
94. Ignition coil is used to
A) Step up voltage B) Step up current C) Step up spark D) Step up power
Ans: A
95. In a diesel engine fuel injection pump, the effective pressure stroke of plungers are regulated by means of a
A) Needle valve B) Control rack C) Cam shaft D) Rotor
Ans: B
96. A hot spark plug has a
A) Long heat path B) Short heat path C) Short insulator nose D) Bigger thread diameter
Ans: A
97. The size of the engine intake valve is
A) Smaller than the exhaust valve B) Same as that of exhaust valve C) Larger than the exhaust valve D) Depends on the temperature of ambient air
Ans: C
98. A smoky blue exhaust is due to
A) Incomplete combustion B) Rich mixture C) Incorrect valve adjustment D) Burning of oil in combustion chamber
Ans: D
99. Speedometer drive is usually taken from
A) Gear box B) Flywheel C) Axle shaft D) Fan belt
Ans: A
100. The knocking in S.I. engines can be prevented, if the end mixture is having
A) High density B) Low density C) High temperature D) Low pressure
Ans: B
A) Hydro carbon B) Fuel vapour C) Water vapour D) Emissions
Ans: B
52. In petrol engines; the three way catalytic converter, the first converter controls
A) CO B) HC C) NO X D) Particulate Matter
Ans: C
53. Doubling the engine cylinder diameter increases the piston thrust by
A) 2 times B) 4 times C) 8 times D) 6 times
Ans: B
54. The firing order of a six cylinder engine is
A) 1 – 3 – 5 – 6 – 2 – 4 B) 1 – 3 – 5 – 2 – 4 – 6
C) 1 – 3 – 2 – 6 – 4 – 5 D) 1 – 5 – 3 – 6 – 4 – 2
Ans: A
55. The distance between TDC to BDC, in degree
A) 180 B) 90
C) 360 D) 45
Ans: A
56. The needle valve of the carburettor is closed by means of a
A) Spring B) Tickler
C) Float D) Throttle
Ans: C
57. Increase in the plate area of a battery cell increases
A) The voltage B) The specific gravity
C) The resistance D) The capacity
Ans: D
58. Chemical condition of the battery plates can be identified by
A) High Discharge test B) Cadmium test
C) Life test D) Sulphation test
Ans: B
59. The cut out relay is not essential in alternators because current flow due to fall in voltage below that of the battery is not allowed by
A) Commutator B) Third brush
C) Rectifier D) Electromagnetic regulator
Ans: C
60. The distance from the gasket seat to the end of the threads of a spark plug, is called
A) Reach B) End clearance
C) Shoulder height D) Plug clearance
Ans: A
61. Engine valves are closed by means of
A) Rocker arm B) Tappet
C) Valve guide D) Spring
Ans: D
62. In a distributor type fuel pump, the injection timing is controlled by adjusting
A) Rotor speed B) Anti-Dribble valve
C) Cam ring D) Plunger stroke
Ans: C
63. The purpose of a governor in an engine is to
A) Limit speed
B) Limit the power
C) Limit the fuel economy
D) Limit the fuel cutoff
Ans: A
64. Pick out the Engine indicator which does not have any inertia effect.
A) Electrical type B) Optical type
C) Mechanical type D) Hydraulic type
Ans: B
65. The vibration damper on a crank shaft of an engine, reduces the
A) Longitudinal vibrations
B) Sequential vibrations
C) Transverse vibrations
D) Torsional vibrations
Ans: D
66. The angle through which the wheel turns to sustain the side forces, is called
A) Slip angle
B) Thrust angle
C) Steering axis inclination
D) Set back angle
Ans: A
67. The ratio of tyre section height to the tyre section width is called
A) Aspect ratio B) Ply rating ratio
C) Offset ratio D) Shoulder ratio
Ans: A
68. The decrease in the effectiveness of brakes with prolonged application is called
A) Skidding B) Bleeding
C) Fading D) Slipping
Ans: C
69. In a car, the pillar onto which the front door latches and the rear door is hinged is called
A) B pillar B) C pillar
C) A pillar D) D pillar
Ans: A
70. The suspension link connecting the vehicle body at one end and the live axle beam at the other end is called
A) Torsion bar B) Wishbone link
C) Trailing arm D) Panhard rod
Ans: D
71. A heavy goods vehicle consisting of a tractor and a semi-trailer is called
A) Station wagon B) Articulated vehicle
C) Coupe with coach D) Van truck
Ans: B
72. If the engine is mounted completely inside the drivers cabin, that type chassis is called
A) Conventional control type
B) Fully inside type
C) Engine forward type
D) Full forward control type
Ans: D
73. Defects in vehicle frame can be identified by checking with
A) Laser beam B) Level rod
C) Plumb line D) Bevel protractor
Ans: C
74. Clutch drag is a trouble experienced due to
A) Excessive free pedal play
B) Weak clutch springs
C) Worn-out clutch facings
D) Worn-out clutch splines
Ans: A
75. The oil used for gear box lubrication is
A) SAE 120 B) SAE 90
C) SAE 180 D) SAE 160
Ans: B
76. Rzeppa joint is an example of
A) Hooke’s joint
B) Constant velocity joint
C) Variable velocity joint
D) Slip joint
Ans: B
77. Final drive mechanism of a vehicle consist of
A) Differential unit
B) Sungear and axle shafts
C) Axle shaft and hub
D) Crownwheel and pinion
Ans: D
78. In hotchkiss drive rear axle mechanism, the torque reaction is taken up by
A) Universal joints B) Shackle
C) Springs D) Axle casing
Ans: C
79. Torsion bar in suspension system takes only
A) Longitudinal stress B) Lateral stress
C) Driving thrust D) Shear stress
Ans: D
80. Trailing link suspension is an example of
A) Live axle suspension B) Hydrostatic suspension
C) Independent suspension D) De Dion suspension
Ans: C
81. The positive castor in the wheels results in a natural tendency to
A) toe-in
B) toe-out
C) roll-in
D) decrease the effort to turn the steering wheel
Ans: A
82. The ratio between side force sustained by a wheel and slip angle is called
A) Camber force B) Self righting torque
C) Pneumatic trail D) Cornering power
Ans: D
83. Wheel tramp is a trouble caused by
A) Wheel bearing tight B) Incorrect kingpin inclination
C) Incorrect castor D) Incorrect tie-in
Ans: C
84. In a tyre, the term “ply rating” indicates
A) Aspect ratio B) Number of plies
C) Thread numbering D) Rated strength
Ans: D
85. The tyre sipes helps to
A) Increase traction B) Increase tyre life
C) Increase cornering effort D) Increase speed
Ans: A
86. Antilock Brake System works on the principle of
A) Channeling of fluids B) Frictional stability
C) Weight transferring D) Pressure modulation
Ans: D
87. The shape of reflector used in head lamp of an automobile is
A) Round B) Parabolic
C) Spherical D) Hyperbolic
Ans: B
88. The instrument used to indicate the engine RPM at any instant is called
A) Odometer B) Speedometer
C) Tachometer D) Oscilloscope
Ans: C
89. In an air brake system, the valve meant to control the intensity of braking is called
A) Unloader valve B) Brake valve
C) Slack valve D) Metering valve
Ans: B
90. An epicyclic gear train is used in
A) Over drive B) torque convertor
C) CVT D) Freewheel unit
Ans: A
91. The device used to reduce the exhaust noise is known as
A) Exhaust pipe B) Exhaust manifold
C) Tail pipe D) Muffler
Ans: D
92. As carbon accumulates in a cylinder it causes an increase in
A) Clearance volume B) Compression ratio
C) Piston displacement D) Volumetric efficiency
Ans: B
93. Radiator tubes are generally made of
A) Steel B) Aluminium
C) Cast iron D) Brass
Ans: D
94. Ignition coil is used to
A) Step up voltage B) Step up current C) Step up spark D) Step up power
Ans: A
95. In a diesel engine fuel injection pump, the effective pressure stroke of plungers are regulated by means of a
A) Needle valve B) Control rack C) Cam shaft D) Rotor
Ans: B
96. A hot spark plug has a
A) Long heat path B) Short heat path C) Short insulator nose D) Bigger thread diameter
Ans: A
97. The size of the engine intake valve is
A) Smaller than the exhaust valve B) Same as that of exhaust valve C) Larger than the exhaust valve D) Depends on the temperature of ambient air
Ans: C
98. A smoky blue exhaust is due to
A) Incomplete combustion B) Rich mixture C) Incorrect valve adjustment D) Burning of oil in combustion chamber
Ans: D
99. Speedometer drive is usually taken from
A) Gear box B) Flywheel C) Axle shaft D) Fan belt
Ans: A
100. The knocking in S.I. engines can be prevented, if the end mixture is having
A) High density B) Low density C) High temperature D) Low pressure
Ans: B