AUTOMOBILE ENGINEERING- PAGE 6
AUTOMOBILE ENGINEERING- PAGE 6
1:-What are the basic factors affect the gear selection?
A:-Vehicle load and engine speed
B:-Vehicle speed and engine load
C:-Vehicle load and road condition
D:-Engine speed and road condition
Ans: B
2:-The cavitations formed inside the torque converter centre is the result of
A:-Low oil pressure
B:-Less engine RPM
C:-Less torque conversion
D:-None of these
Ans: A
3:-The plunging type constant velocity joint is employed at the ________ end of the drive shaft.
A:-Wheel end
B:-Differential end
C:-Both (1) and (2)
D:-Main shaft end
Ans: B
4:-Which of the following is not a reason for humming noise from the rear axle?
A:-Worn out differential bearings
B:-Backlash between crown and pinion
C:-Worn out gears
D:-Worn out axle shaft splines
Ans: D
5:-The material used to improve the resistance to wear of rubber threads in a tire is
A:-Nylon
B:-Rayon
C:-Carbon black
D:-Terylene
Ans: C
6:-Which part of a master cylinder serves to retain the residual pressure in the brake lines even when the brakes are released?
A:-Check valve
B:-Piston
C:-Piston return spring
D:-Primary cup
Ans: A
7:-Lamda sensors are located at
A:-Exhaust manifold
B:-Inlet manifold
C:-Throttle body
D:-Timing cover
Ans: A
8:-Sedimentation type fuel filters are generally used as
A:-Baby filter
B:-Secondary filter
C:-Primary filter
D:-All of these
Ans: C
9:-Which one of the following is a cylinder head gasket material?
A:-Felcoprene
B:-Felcoid
C:-Cord
D:-Shimbestose
Ans: D
10:-The ability of engine bearings to accommodates small variation in shaft is its
A:-Embadability
B:-Conformability
C:-Adaptability
D:-Fatigue strength
Ans: B
11:-Free wheel unit in the transmission are provided with dog clutch to
A:-Lock free wheel
B:-Engage free wheel
C:-Disengage free wheel
D:-None of these
Ans: A
12:-Critical whirling speed of a propeller shaft can be increased by
A:-Decreasing diameter
B:-Increasing length
C:-Both (1) and (2)
D:-Decreasing length
Ans: D
13:-Which member of a torque converter is also known as reactor?
A:-Lock up clutch
B:-Stator
C:-Impeller
D:-Turbine
Ans: B
14:-Front wheel drive cars are usually employed with ________ type independent suspension to provide maximum room in the engine compartment.
A:-Vertical guide
B:-Trailing link
C:-Mac Pherson strut
D:-Wish bone
Ans: C
15:-The effect of positive scrub radius on the road wheels are
A:-Toe-in
B:-Toe-out
C:-Pull to one side
D:-Wobble
Ans: B
16:-Glow plugs are fitted an engine with
A:-Pre combustion chamber
B:-Turbulent chamber
C:-Both (1) and (2)
D:-Open combustion chamber
Ans: A
17:-The main disadvantage of lower aspect ratio
A:-More tire wear
B:-Less cornering power
C:-High speed shimmy
D:-Uncomfortable ride
Ans: D
18:-Contact breaker point of a 6 cylinder 4 stroke engine operating at 3000 RPM will make and break for _______ times in a minute.
A:-3000
B:-6000
C:-9000
D:-12000
Ans: C
19:-One bar is equal to
A:-10 Kpa
B:-100 Kpa
C:-1000 Kpa
D:-10000 Kpa
Ans: B
20:-Piston rings and cylinder liners are
A:-Die casted
B:-Hollow casted
C:-Sand casted
D:-Centrifugal casted
Ans: D
21:-Gear mechanism in a slack adjuster
A:-Worm and wheel
B:-Worm and nut
C:-Worm and roller
D:-Rack and pinion
Ans: A
22:-Arrangement of the chassis in which provide maximum utilization of space
A:-Full-forward control chassis
B:-Semi-forward control chassis
C:-Conventional control chassis
D:-None of these
Ans: A
23:-To accommodate any misalignment between the engine or transmission relative to frame or body with the help of
A:-Brackets
B:-Side member
C:-Sub frame
D:-Rubber blocks
Ans: D
24:-In a rear axle drive vehicle, torque reaction and braking torque are transmitted from the axle casing to the frame by means of
A:-Pan hard rod
B:-Leaf spring
C:-Torsion bar
D:-Stabilizer bar
Ans: B
25:-Hazard flashers are used to indicate
A:-A slow moving vehicle in high speed lane
B:-A disabled vehicle in high speed lane
C:-A vehicle stopped in moving traffic
D:-All of these
Ans: D
26:-Which type of brake chamber is provided with fail safe parking brake?
A:-Spring brake chamber
B:-Single diaphragm brake chamber
C:-Double diaphragm brake chamber
D:-Triple diaphragm brake chamber
Ans: A
27:-The propellant unit of air bag consists of
A:-Potassium chloride and silver nitrate
B:-Potassium chloride and sodium azide
C:-Potassium nitrate and sodium azide
D:-Potassium nitrate and sodium chloride
Ans: C
28:-Which of the following is controls fuel surge in fuel tank on vehicle movement?
A:-Ribs
B:-Baffles
C:-Brackets
D:-Belts
Ans: B
29:-Excess fuel pressure in a CRDI engine system is protected with a
A:-ECU
B:-Rail pressure sensor
C:-Pressure limiter valve
D:-Flow limiter
Ans: C
30:-The function of an air cleaner
A:-Act as silencer
B:-Act as flame arrester
C:-Filtering intake air
D:-All of these
Ans: D
31. The purpose of adding wood flour or saw dust to foundry sand is to improve (A) Mouldability (B) Collapsibility (C) Dry strength (D) Hot strength
Ans: B
32. Investment casting uses pattern made of ….... (A) Wax (B) Clay (C) Metal (D) Wood
Ans: A
33. Casting defect development due to inadequate venting is (A) Inclusions (B) Cold Shuts (C) Blow holes (D) None of the options
Ans: C
34. The operation of making a cone shaped enlargement or recess at the end of a hole is called (A) Spot facing (B) Tapping (C) Boring (D) Countersinking
Ans: D
35. Precision is (A) Performance of the product (B) Reproducibility of the process (C) Degree of conformity with a standard (D) None of the options
Ans: B
36. A cylindrical specimen of steel having original diameter of 10 mm is tensile tested to fracture. If its cross section diameter at fracture is 8 mm then the ductility in terms of percent reduction in area will be (A) 36 % (B) 70 % (C) 20 % (D) 46 %
Ans: A
37. When a metal part is subjected to a high constant stress at high temperature for a longer period of time, it will undergo a slow and permanent deformation, called as (A) formability (B) Slip (C) Creep (D) None of the options
Ans: C
38. If strain measurements were made during a tensile test, which of the following would have the higher value (A) Engineering strain (B) True strain (C) Both engineering and true strain will be same (D) None of the options
Ans: A
39. A tensile test uses a test specimen that has a gage length of 50 mm and cross section area is 200 sq. mm. During the test the specimen yields under a load of 98,000 N. Determine yield strength.
(A) 1960 MPa (B) 300 MPa (C) 490 MPa (D) None of the options
Ans: C
40. Snap gauge is used to quickly measure/verify
(A) Outside dimensions of the part (B) Inside dimensions of the part (C) Both (A) and (B) (D) None of the options
Ans: A
41. A tolerance is, which one of the following
(A) Clearance between a shaft and a mating hole (B) Measurement error
(C) Total permissible variation from a specified dimension (D) Variation in manufacturing
Ans: C
42. Errors which are regularly repetitive in nature are
(A) Systematic errors (B) Avoidable errors (C) Random errors (D) Loading errors
Ans: A
43. The value of pressure above the reference value of atmospheric pressure is
(A) Absolute pressure (B) Gauge pressure (C) Vacuum pressure (D) Loading errors
Ans: B
44. The desirable characteristics of the manometer fluid used to measure pressure are
(A) High viscosity and high surface tension (B) Low viscosity and high surface tension
(C) Low viscosity and low surface tension (D) None of the options
Ans: C
45. The gear tooth venire is used to measure
(A) Gear tooth profile (B) Pitch line thickness of the gear tooth (C) Module of the gear (D) None of the options
Ans: B
46. Which of the following thermodynamic law provides the basis for measurements of thermodynamic property, temperature (A) Zeroth law of thermodynamic (B) First law of thermodynamic (C) Second law of thermodynamic (D) None of the options
Ans: A
47. Hot wire anemometer is a device used to measure
(A) Pressure in gases (B) Liquid discharge (C) Gas velocities (D) Temperature
Ans: C
48. Zero decibel (dB) sound pressure level (SPL) represents
(A) Zero acoustic pressure (B) Quietest sound audible to a healthy human ear (C) No sound (D) None of the options
Ans: B
49. The instrument which measures the temperature of the source without direct contact is
(A) Liquid in glass thermometer (B) Vapour pressure thermometer (C) Pyrometer (D) Thermocouple
Ans: C
50. Orsat apparatus is used for
(A) Gravimetric analysis of flue gas (B) Volumetric analysis of flue gas (C) Mass flow of flue gas (D) None of the options
Ans: B
A:-Vehicle load and engine speed
B:-Vehicle speed and engine load
C:-Vehicle load and road condition
D:-Engine speed and road condition
Ans: B
2:-The cavitations formed inside the torque converter centre is the result of
A:-Low oil pressure
B:-Less engine RPM
C:-Less torque conversion
D:-None of these
Ans: A
3:-The plunging type constant velocity joint is employed at the ________ end of the drive shaft.
A:-Wheel end
B:-Differential end
C:-Both (1) and (2)
D:-Main shaft end
Ans: B
4:-Which of the following is not a reason for humming noise from the rear axle?
A:-Worn out differential bearings
B:-Backlash between crown and pinion
C:-Worn out gears
D:-Worn out axle shaft splines
Ans: D
5:-The material used to improve the resistance to wear of rubber threads in a tire is
A:-Nylon
B:-Rayon
C:-Carbon black
D:-Terylene
Ans: C
6:-Which part of a master cylinder serves to retain the residual pressure in the brake lines even when the brakes are released?
A:-Check valve
B:-Piston
C:-Piston return spring
D:-Primary cup
Ans: A
7:-Lamda sensors are located at
A:-Exhaust manifold
B:-Inlet manifold
C:-Throttle body
D:-Timing cover
Ans: A
8:-Sedimentation type fuel filters are generally used as
A:-Baby filter
B:-Secondary filter
C:-Primary filter
D:-All of these
Ans: C
9:-Which one of the following is a cylinder head gasket material?
A:-Felcoprene
B:-Felcoid
C:-Cord
D:-Shimbestose
Ans: D
10:-The ability of engine bearings to accommodates small variation in shaft is its
A:-Embadability
B:-Conformability
C:-Adaptability
D:-Fatigue strength
Ans: B
11:-Free wheel unit in the transmission are provided with dog clutch to
A:-Lock free wheel
B:-Engage free wheel
C:-Disengage free wheel
D:-None of these
Ans: A
12:-Critical whirling speed of a propeller shaft can be increased by
A:-Decreasing diameter
B:-Increasing length
C:-Both (1) and (2)
D:-Decreasing length
Ans: D
13:-Which member of a torque converter is also known as reactor?
A:-Lock up clutch
B:-Stator
C:-Impeller
D:-Turbine
Ans: B
14:-Front wheel drive cars are usually employed with ________ type independent suspension to provide maximum room in the engine compartment.
A:-Vertical guide
B:-Trailing link
C:-Mac Pherson strut
D:-Wish bone
Ans: C
15:-The effect of positive scrub radius on the road wheels are
A:-Toe-in
B:-Toe-out
C:-Pull to one side
D:-Wobble
Ans: B
16:-Glow plugs are fitted an engine with
A:-Pre combustion chamber
B:-Turbulent chamber
C:-Both (1) and (2)
D:-Open combustion chamber
Ans: A
17:-The main disadvantage of lower aspect ratio
A:-More tire wear
B:-Less cornering power
C:-High speed shimmy
D:-Uncomfortable ride
Ans: D
18:-Contact breaker point of a 6 cylinder 4 stroke engine operating at 3000 RPM will make and break for _______ times in a minute.
A:-3000
B:-6000
C:-9000
D:-12000
Ans: C
19:-One bar is equal to
A:-10 Kpa
B:-100 Kpa
C:-1000 Kpa
D:-10000 Kpa
Ans: B
20:-Piston rings and cylinder liners are
A:-Die casted
B:-Hollow casted
C:-Sand casted
D:-Centrifugal casted
Ans: D
21:-Gear mechanism in a slack adjuster
A:-Worm and wheel
B:-Worm and nut
C:-Worm and roller
D:-Rack and pinion
Ans: A
22:-Arrangement of the chassis in which provide maximum utilization of space
A:-Full-forward control chassis
B:-Semi-forward control chassis
C:-Conventional control chassis
D:-None of these
Ans: A
23:-To accommodate any misalignment between the engine or transmission relative to frame or body with the help of
A:-Brackets
B:-Side member
C:-Sub frame
D:-Rubber blocks
Ans: D
24:-In a rear axle drive vehicle, torque reaction and braking torque are transmitted from the axle casing to the frame by means of
A:-Pan hard rod
B:-Leaf spring
C:-Torsion bar
D:-Stabilizer bar
Ans: B
25:-Hazard flashers are used to indicate
A:-A slow moving vehicle in high speed lane
B:-A disabled vehicle in high speed lane
C:-A vehicle stopped in moving traffic
D:-All of these
Ans: D
26:-Which type of brake chamber is provided with fail safe parking brake?
A:-Spring brake chamber
B:-Single diaphragm brake chamber
C:-Double diaphragm brake chamber
D:-Triple diaphragm brake chamber
Ans: A
27:-The propellant unit of air bag consists of
A:-Potassium chloride and silver nitrate
B:-Potassium chloride and sodium azide
C:-Potassium nitrate and sodium azide
D:-Potassium nitrate and sodium chloride
Ans: C
28:-Which of the following is controls fuel surge in fuel tank on vehicle movement?
A:-Ribs
B:-Baffles
C:-Brackets
D:-Belts
Ans: B
29:-Excess fuel pressure in a CRDI engine system is protected with a
A:-ECU
B:-Rail pressure sensor
C:-Pressure limiter valve
D:-Flow limiter
Ans: C
30:-The function of an air cleaner
A:-Act as silencer
B:-Act as flame arrester
C:-Filtering intake air
D:-All of these
Ans: D
31. The purpose of adding wood flour or saw dust to foundry sand is to improve (A) Mouldability (B) Collapsibility (C) Dry strength (D) Hot strength
Ans: B
32. Investment casting uses pattern made of ….... (A) Wax (B) Clay (C) Metal (D) Wood
Ans: A
33. Casting defect development due to inadequate venting is (A) Inclusions (B) Cold Shuts (C) Blow holes (D) None of the options
Ans: C
34. The operation of making a cone shaped enlargement or recess at the end of a hole is called (A) Spot facing (B) Tapping (C) Boring (D) Countersinking
Ans: D
35. Precision is (A) Performance of the product (B) Reproducibility of the process (C) Degree of conformity with a standard (D) None of the options
Ans: B
36. A cylindrical specimen of steel having original diameter of 10 mm is tensile tested to fracture. If its cross section diameter at fracture is 8 mm then the ductility in terms of percent reduction in area will be (A) 36 % (B) 70 % (C) 20 % (D) 46 %
Ans: A
37. When a metal part is subjected to a high constant stress at high temperature for a longer period of time, it will undergo a slow and permanent deformation, called as (A) formability (B) Slip (C) Creep (D) None of the options
Ans: C
38. If strain measurements were made during a tensile test, which of the following would have the higher value (A) Engineering strain (B) True strain (C) Both engineering and true strain will be same (D) None of the options
Ans: A
39. A tensile test uses a test specimen that has a gage length of 50 mm and cross section area is 200 sq. mm. During the test the specimen yields under a load of 98,000 N. Determine yield strength.
(A) 1960 MPa (B) 300 MPa (C) 490 MPa (D) None of the options
Ans: C
40. Snap gauge is used to quickly measure/verify
(A) Outside dimensions of the part (B) Inside dimensions of the part (C) Both (A) and (B) (D) None of the options
Ans: A
41. A tolerance is, which one of the following
(A) Clearance between a shaft and a mating hole (B) Measurement error
(C) Total permissible variation from a specified dimension (D) Variation in manufacturing
Ans: C
42. Errors which are regularly repetitive in nature are
(A) Systematic errors (B) Avoidable errors (C) Random errors (D) Loading errors
Ans: A
43. The value of pressure above the reference value of atmospheric pressure is
(A) Absolute pressure (B) Gauge pressure (C) Vacuum pressure (D) Loading errors
Ans: B
44. The desirable characteristics of the manometer fluid used to measure pressure are
(A) High viscosity and high surface tension (B) Low viscosity and high surface tension
(C) Low viscosity and low surface tension (D) None of the options
Ans: C
45. The gear tooth venire is used to measure
(A) Gear tooth profile (B) Pitch line thickness of the gear tooth (C) Module of the gear (D) None of the options
Ans: B
46. Which of the following thermodynamic law provides the basis for measurements of thermodynamic property, temperature (A) Zeroth law of thermodynamic (B) First law of thermodynamic (C) Second law of thermodynamic (D) None of the options
Ans: A
47. Hot wire anemometer is a device used to measure
(A) Pressure in gases (B) Liquid discharge (C) Gas velocities (D) Temperature
Ans: C
48. Zero decibel (dB) sound pressure level (SPL) represents
(A) Zero acoustic pressure (B) Quietest sound audible to a healthy human ear (C) No sound (D) None of the options
Ans: B
49. The instrument which measures the temperature of the source without direct contact is
(A) Liquid in glass thermometer (B) Vapour pressure thermometer (C) Pyrometer (D) Thermocouple
Ans: C
50. Orsat apparatus is used for
(A) Gravimetric analysis of flue gas (B) Volumetric analysis of flue gas (C) Mass flow of flue gas (D) None of the options
Ans: B
51. By using synchronizing device in gear box, the two adjacent gears/dog clutches have their speeds (A) Increased (B) Equalized (C) Reduced (D) Unequalized
Ans: B
52. A two piece propeller shaft requires (A) One universal joint (B) The shaft to be solid (C) Centre support bearing (D) None of the options
Ans: C
53. The output from the car engine is 100 kW. The thermal efficiency of the engine is 25 % and heat lost to the coolant is 30 % of the heat supplied. What is the amount of heat lost to coolant in kW? (A) 120 (B) 210 (C) 55 (D) None of the options
Ans: A
54. A car of mass 500 kg is travelling at 36 km/hour. Determine the kinetic energy it possesses (A) 50 kJ (B) 100 kJ (C) 35 kJ (D) 25 Kj
Ans: D
55. Engine Piston is manufactured with ovality, to cope up with ...................... (A) Reciprocating motion (B) Structural stress (C) Thermal expansion (D) None of the options
Ans: C
56. In cooling system, minimum operating temperature of engine is controlled by (A) Fan (B) Pump (C) Thermostat (D) None of the options
Ans: C
57. Sequence of coolant circulation in engine cooling system is (A) Pump–radiator-block-head (B) Pump–block-head-radiator (C) Pump–block-radiator- head (D) Pump–radiator-head-block
Ans: B
58. The primary function of the engine lubrication system is (A) Provide cooling effect (B) Provide sealing action (C) Reduce wear (D) Provide cleaning action
Ans: C
59. Another name for the Pitman rod of steering linkage is (A) Track rod (B) Drag link (C) Tie rod (D) Drop arm
Ans: D
60. In hydraulic braking system the braking force is directly proportional to the (A) Viscosity of brake oil (B) Ratio of cross sectional areas of master cylinder and wheel cylinder (C) Oil temperature (D) Friction material
Ans: B
61. The size of cam depends upon (A) Prime circle (B) Base circle (C) Pitch Circle (D) None of the optionsAns: B
62. The working cycle in case of four stroke engine, is completed in following number of revolutions of the crankshaft (A) 1 (B) 2 (C) 3 (D) ½
Ans: B
63. In diesel engine fuel is ignited by (A) Spark (B) Igniter (C) Heat resulting from compressing air that is supplied for combustion (D) None of the options
Ans: C
64. Scavenging process in diesel engine means (A) Supplying air under pressure for combustion (B) Supplying air for cooling cylinder (C) Forcing burnt gases out of the cylinder (D) None of the options
Ans: C
65. The operation of forcing additional air under pressure in the engine cylinder is known as (A) Pre-ignition (B) Turbulence (C) Supercharging (D) None of the options
Ans: C
66. The ignition quality of petrol is expressed by (A) Cetane number (B) Octane number (C) Calorific value (D) All of the options
Ans: B
67. Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to (A) Cylinder walls being too hot (B) Overheated spark plug points (C) Red hot carbon deposits on cylinder walls (D) Any one of these
Ans: D
68. In a diesel engine, the duration between the time of injection and ignition, is known as (A) Burning period (B) Delay period (C) Period of ignition (D) None of the options
Ans: B
69. The self-ignition temperature of petrol is ......................... as compared to diesel oil. (A) Same (B) Lower (C) Higher (D) None of the options
Ans: C
70. The pressure inside the engine cylinder is ..................... the atmospheric pressure during the exhaust stroke (A) Equal to (B) Below (C) Above (D) None of the options
Ans: C
71. A carburetor is used to supply (A) Petrol, air and lubricating oil (B) Air and diesel (C) Petrol and lubricating oil (D) Petrol and air
Ans: D
72. The ratio of the engine brake power to the indicated power is called (A) Mechanical efficiency (B) Overall efficiency (C) Indicated thermal efficiency (D) Volumetric efficiency
Ans: A
73. Morse test is used to determine the indicated power of a (A) Single cylinder petrol engine (B) Single cylinder diesel engine (C) Multi-cylinder engine (D) None of the options
Ans: C
74. Spot welding is an example of (A) Gas welding (B) Arc welding (C) Resistance welding (D) Tungsten inert gas welding
Ans: C
75. The thermodynamic cycle on which the petrol engine works, is (A) Otto cycle (B) Joule cycle (C) Rankine cycle (D) Stirling cycle
Ans: A
76. The function of an alternator in an automobile is to (A) Supply electric power (B) Continually recharge the battery (C) Partly convert engine power into electric power (D) None of the options
Ans: B
77. The main function of the tread pattern on tyre is that (A) The crests between the tread grooves absorb road noise (B) In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface (C) The tread pattern protects the tyre's inner carcass from small stones and pieces of glass (D) None of the options
Ans: B
78. With the increase of battery temperature ,the specific gravity of electrolyte (A) Increases (B) Decreases (C) Remains same (D) None of the options
Ans: B
79. To increase output voltage automotive battery cells are connected in (A) Series (B) Parallel\ (C) Series-parallel (D) None of the options
Ans: A
80. In which DC motors field winding is connected in parallel with the armature (A) Shunt wound motor (B) Series wound motor (C) Shunt and series wound motor (D) None of the options
Ans: A
81. In a DC generator magnetic field is produced in the (A) Armature (B) Carbon brushes (C) Commutator (D) Stator
Ans: D
82. In an alternator the magnetic field is produced in the (A) Rotor (B) Frame (C) Regulator (D) Stator
Ans: A
83. The three components of the primary ignition circuit of battery ignition system are (A) The contact breaker, condenser and distributor cap (B) The contact breaker, ignition coil and spark plug (C) The contact breaker, ignition switch and condenser (D) None of the options
Ans: C
84. The electrical wires are specified by (A) The colour and length (B) The length and diameter (C) The number and size of strands (D) The colour and diameter
Ans: C
85. Which system from following is most accurate ignition system of a spark ignition engine? (A) Magneto system (B) Battery system (C) Electronic system (D) None of the options
Ans: C
86. The advantage of a tubeless tyre over tube type tyre is/are? (A) Slow air leakage (B) Better fuel efficiency (C) Less chances of running flat (D) All of the options
Ans: D
87. An overinflated tyre will wear the tread most near the (A) Edges (B) Centre (C) Corners (D) None of the options
Ans: B
88. The instrument used to check specific gravity of acid in a battery is (A) Hydrometer (B) Hygrometer (C) Anemometer (D) Multimeter
Ans: A
89. The basic purpose of tyres is to (A) Grip the road and provide good traction (B) Substitute for springs (C) Act as brake (D) None of the options
Ans: A
90. Which part of the automobile tyre is subjected to greatest flexing action? (A) Bead (B) Side wall (C) Shoulder (D) Tread
Ans: B
91. The disadvantage of radial ply tyre compared to cross ply tyre is (A) Uncomfortable ride at slow speeds (B) Uncomfortable ride at high speeds (C) Higher cornering power (D) None of the options
Ans: A
92. The main purpose of transmission in an automobile is
(A) To vary the power of Engine (B) To vary the torque at road wheels (C) To reduce the vibration and noise (D) None of the options
Ans: B
93. The central gear of an epicyclic gear set is called a (A) Planet gear (B) Sun gear (C) Internal gear (D) None of the options
Ans: B
94. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of (A) Wheel diameter to section width (B) Section width to section height (C) Section height to section width (D) Wheel diameter to section height
Ans: C
95. The caster is called positive when the top of the king pin is inclined to the (A) Front of the vehicle (B) Left of the vehicle (C) Right of the vehicle (D) Rear of the vehicle
Ans: D
96. The device for smoothening out the power impulses from the engine is called
(A) Clutch (B) Differential (C) Flywheel (D) None of the options
Ans: C
97. Compared to framed construction, the frameless construction of automobiles is economical
(A) Always (B) When produced in small quantities (C) When produced on large scale (D) Never
Ans: C
98. In case of four wheel drive vehicle
(A) Cooling system is simplified (B) The road adhesion is increased (C) The road adhesion is decreased (D) None of the options
Ans: B
99. Before drilling a hole ,its centre is marked with a
(A) Punch (B) Drill bit (C) Ring spanner (D) None of the options
Ans: A
100. Tool used for cutting inside threads is called
(A) Die (B) Cutter (C) Bender (D) Tap
Ans: D
Ans: B
52. A two piece propeller shaft requires (A) One universal joint (B) The shaft to be solid (C) Centre support bearing (D) None of the options
Ans: C
53. The output from the car engine is 100 kW. The thermal efficiency of the engine is 25 % and heat lost to the coolant is 30 % of the heat supplied. What is the amount of heat lost to coolant in kW? (A) 120 (B) 210 (C) 55 (D) None of the options
Ans: A
54. A car of mass 500 kg is travelling at 36 km/hour. Determine the kinetic energy it possesses (A) 50 kJ (B) 100 kJ (C) 35 kJ (D) 25 Kj
Ans: D
55. Engine Piston is manufactured with ovality, to cope up with ...................... (A) Reciprocating motion (B) Structural stress (C) Thermal expansion (D) None of the options
Ans: C
56. In cooling system, minimum operating temperature of engine is controlled by (A) Fan (B) Pump (C) Thermostat (D) None of the options
Ans: C
57. Sequence of coolant circulation in engine cooling system is (A) Pump–radiator-block-head (B) Pump–block-head-radiator (C) Pump–block-radiator- head (D) Pump–radiator-head-block
Ans: B
58. The primary function of the engine lubrication system is (A) Provide cooling effect (B) Provide sealing action (C) Reduce wear (D) Provide cleaning action
Ans: C
59. Another name for the Pitman rod of steering linkage is (A) Track rod (B) Drag link (C) Tie rod (D) Drop arm
Ans: D
60. In hydraulic braking system the braking force is directly proportional to the (A) Viscosity of brake oil (B) Ratio of cross sectional areas of master cylinder and wheel cylinder (C) Oil temperature (D) Friction material
Ans: B
61. The size of cam depends upon (A) Prime circle (B) Base circle (C) Pitch Circle (D) None of the optionsAns: B
62. The working cycle in case of four stroke engine, is completed in following number of revolutions of the crankshaft (A) 1 (B) 2 (C) 3 (D) ½
Ans: B
63. In diesel engine fuel is ignited by (A) Spark (B) Igniter (C) Heat resulting from compressing air that is supplied for combustion (D) None of the options
Ans: C
64. Scavenging process in diesel engine means (A) Supplying air under pressure for combustion (B) Supplying air for cooling cylinder (C) Forcing burnt gases out of the cylinder (D) None of the options
Ans: C
65. The operation of forcing additional air under pressure in the engine cylinder is known as (A) Pre-ignition (B) Turbulence (C) Supercharging (D) None of the options
Ans: C
66. The ignition quality of petrol is expressed by (A) Cetane number (B) Octane number (C) Calorific value (D) All of the options
Ans: B
67. Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to (A) Cylinder walls being too hot (B) Overheated spark plug points (C) Red hot carbon deposits on cylinder walls (D) Any one of these
Ans: D
68. In a diesel engine, the duration between the time of injection and ignition, is known as (A) Burning period (B) Delay period (C) Period of ignition (D) None of the options
Ans: B
69. The self-ignition temperature of petrol is ......................... as compared to diesel oil. (A) Same (B) Lower (C) Higher (D) None of the options
Ans: C
70. The pressure inside the engine cylinder is ..................... the atmospheric pressure during the exhaust stroke (A) Equal to (B) Below (C) Above (D) None of the options
Ans: C
71. A carburetor is used to supply (A) Petrol, air and lubricating oil (B) Air and diesel (C) Petrol and lubricating oil (D) Petrol and air
Ans: D
72. The ratio of the engine brake power to the indicated power is called (A) Mechanical efficiency (B) Overall efficiency (C) Indicated thermal efficiency (D) Volumetric efficiency
Ans: A
73. Morse test is used to determine the indicated power of a (A) Single cylinder petrol engine (B) Single cylinder diesel engine (C) Multi-cylinder engine (D) None of the options
Ans: C
74. Spot welding is an example of (A) Gas welding (B) Arc welding (C) Resistance welding (D) Tungsten inert gas welding
Ans: C
75. The thermodynamic cycle on which the petrol engine works, is (A) Otto cycle (B) Joule cycle (C) Rankine cycle (D) Stirling cycle
Ans: A
76. The function of an alternator in an automobile is to (A) Supply electric power (B) Continually recharge the battery (C) Partly convert engine power into electric power (D) None of the options
Ans: B
77. The main function of the tread pattern on tyre is that (A) The crests between the tread grooves absorb road noise (B) In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface (C) The tread pattern protects the tyre's inner carcass from small stones and pieces of glass (D) None of the options
Ans: B
78. With the increase of battery temperature ,the specific gravity of electrolyte (A) Increases (B) Decreases (C) Remains same (D) None of the options
Ans: B
79. To increase output voltage automotive battery cells are connected in (A) Series (B) Parallel\ (C) Series-parallel (D) None of the options
Ans: A
80. In which DC motors field winding is connected in parallel with the armature (A) Shunt wound motor (B) Series wound motor (C) Shunt and series wound motor (D) None of the options
Ans: A
81. In a DC generator magnetic field is produced in the (A) Armature (B) Carbon brushes (C) Commutator (D) Stator
Ans: D
82. In an alternator the magnetic field is produced in the (A) Rotor (B) Frame (C) Regulator (D) Stator
Ans: A
83. The three components of the primary ignition circuit of battery ignition system are (A) The contact breaker, condenser and distributor cap (B) The contact breaker, ignition coil and spark plug (C) The contact breaker, ignition switch and condenser (D) None of the options
Ans: C
84. The electrical wires are specified by (A) The colour and length (B) The length and diameter (C) The number and size of strands (D) The colour and diameter
Ans: C
85. Which system from following is most accurate ignition system of a spark ignition engine? (A) Magneto system (B) Battery system (C) Electronic system (D) None of the options
Ans: C
86. The advantage of a tubeless tyre over tube type tyre is/are? (A) Slow air leakage (B) Better fuel efficiency (C) Less chances of running flat (D) All of the options
Ans: D
87. An overinflated tyre will wear the tread most near the (A) Edges (B) Centre (C) Corners (D) None of the options
Ans: B
88. The instrument used to check specific gravity of acid in a battery is (A) Hydrometer (B) Hygrometer (C) Anemometer (D) Multimeter
Ans: A
89. The basic purpose of tyres is to (A) Grip the road and provide good traction (B) Substitute for springs (C) Act as brake (D) None of the options
Ans: A
90. Which part of the automobile tyre is subjected to greatest flexing action? (A) Bead (B) Side wall (C) Shoulder (D) Tread
Ans: B
91. The disadvantage of radial ply tyre compared to cross ply tyre is (A) Uncomfortable ride at slow speeds (B) Uncomfortable ride at high speeds (C) Higher cornering power (D) None of the options
Ans: A
92. The main purpose of transmission in an automobile is
(A) To vary the power of Engine (B) To vary the torque at road wheels (C) To reduce the vibration and noise (D) None of the options
Ans: B
93. The central gear of an epicyclic gear set is called a (A) Planet gear (B) Sun gear (C) Internal gear (D) None of the options
Ans: B
94. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of (A) Wheel diameter to section width (B) Section width to section height (C) Section height to section width (D) Wheel diameter to section height
Ans: C
95. The caster is called positive when the top of the king pin is inclined to the (A) Front of the vehicle (B) Left of the vehicle (C) Right of the vehicle (D) Rear of the vehicle
Ans: D
96. The device for smoothening out the power impulses from the engine is called
(A) Clutch (B) Differential (C) Flywheel (D) None of the options
Ans: C
97. Compared to framed construction, the frameless construction of automobiles is economical
(A) Always (B) When produced in small quantities (C) When produced on large scale (D) Never
Ans: C
98. In case of four wheel drive vehicle
(A) Cooling system is simplified (B) The road adhesion is increased (C) The road adhesion is decreased (D) None of the options
Ans: B
99. Before drilling a hole ,its centre is marked with a
(A) Punch (B) Drill bit (C) Ring spanner (D) None of the options
Ans: A
100. Tool used for cutting inside threads is called
(A) Die (B) Cutter (C) Bender (D) Tap
Ans: D