AUTOMOBILE ENGINEERING- PAGE 4
AUTOMOBILE ENGINEERING- PAGE 4
1. Piston pin is also known as
(A) gudgeon pin (B) crank pin (C) screw pin (D) none
Ans: A
2. The speedometer is driven from the gear box shaft called
(A) primary (B) counter (C) lay (D) main
Ans: D
3. In the specification of dimensions and fits,
(A) allowance is equal to bilateral tolerance
(B) allowance is equal to unilateral tolerance
(C) allowance is independent of tolerance
(D) allowance is equal to the difference between maximum and minimum dimension specified by the tolerance
Ans: C
4. In disc brake, the disc is attached to the
(A) wheel (B) axle (C) suspension system (D) none of the above
Ans: B
5. Calorific value of diesel oil is of the order of
(A) 3000 kcal/kg (B) 5000 kcal/kg (C) 7500 kcal/kg (D) 10000 kcal/kg
Ans: D
6. Which one of the following modes of heat transfer would take place predominantly from boiler furnace to water wall?
(A) convection (B) conduction (C) radiation (D) conduction and convection
Ans: C
7. In force feed lubrication system the device used to guard against excessive oil pressure is known as
(A) release chamber (B) balancer (C) relief valve (D) stop valve
Ans: C
8. The fins at the top of a motor cycle engine cylinder are longer than those at the bottom because
(A) hot air rises
(B) top is the hottest part
(C) they are in an exposed position
(D) extra strength is required at the top
Ans: B
9. During the gear tooth cutting operation, the undercutting may occur, due to the corners of the cutter biting into the true involute curve on the flank of the tooth, this is called interference. It can be avoided by
(A) increasing the addendum on the pinion and reducing on the gear wheel (B) increasing the addendum on both pinion and gear wheel
(C) reducing the addendum on both pinion and gear wheel (D) None of the above
Ans: A
10. Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as;
(A) cold shut (B) swell (C) sand wash (D) scab
Ans: A
11. A jet engine works on the principle of
(A) Conservation of energy (B) Conservation of mass
(C) Conservation of linear momentum (D) Conservation of angular momentum
Ans: C
12. Due to which of the following the artificial satellite stays in orbit around the earth
(A) equilibrium between forces of attraction due to earth and other planet (B) upward pull of satellite
(C) centripetal force provided by earth’s gravitational acceleration (D) negligible earth’s gravitational field
Ans: C
13. Wien’s displacement law is useful in explaining
(A) displacement of celestial bodies (B) relative motion between electrons
(C) changing of colour of heated iron (D) none of the above
Ans: C
14. The vertical feed mechanism in a drilling machine uses
(A) rack and pinion (B) spur gears (C) helical gears (D) bevel gears
Ans: C
15. A heat engine using lake water at 12°C as source and surrounding atmosphere at 2°C as sink executes 1080 cycles per minute. If the amount of heat drawn per cycle is 57 J, then the output of the engine will be
(A) 66W (B) 56W (C) 46W (D) 36W
Ans: D
16. External taper can be obtained by
(A) taper attachment (B) form tool (C) compound rest (D) tail stock offset
Ans: D
17. Disposable patterns are made of
(A) wood (B) rubber (C) metal (D) polystyrene
Ans: D
18. In the cam, the distance between the base circle and the nose is called
(A) flank (B) lobe (C) none (D) lift
Ans: D
19. The most popular device for measuring engine output is_______
(A) pneumatic dynamometer (B) hydraulic dynamometer (C) electric dynamometer (D) None of the above
Ans: B
20. A turbo charger is driven by the__________ energy of the engine.
(A) exhaust (B) electrical (C) pneumatic (D) escape
Ans: A
21. Column I gives the different terms related to combustion while Column II gives the outcome of the event that follows. Match Column-I with Column-II and select the correct answers:
Column I Column II
P. Association 1. Pseudo shock
Q. Dissociation 2. Knock
R. Flame front 3. Endothermic
S. Abnormal Combustion 4. Exothermic
(A) P-3, Q-4, R-1, S-2
(B) P-4, Q-3, R-1, S-2
(C) P-3, Q-4, R-2, S-1
(D) P-4, Q-3, R-2, S-1
Ans: B
22. Total Quality Management (TQM) focuses on
(A) Employee (B) Customer (C) both A and B (D) none
Ans: C
23. Which of the following is responsible for quality objective?
(A) Top level management (B) Frontline management (C) Middle level management (D) All of them
Ans: A
24. For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in
(A) enthalpy (B) entropy (C) temperature (D) internal energy
Ans: D
25. A single cylinder, four-stroke engine is rotating at 2000 r.p.m. The number of power strokes occurring in one minute is
(A) 500 (B) 1000 (C) 2000 (D) 4000
Ans: B
26. The rear end suspension arrangement in which rear end torque is absorbed by the spring is called the
(A) torque tube drive (B) hooks drive (C) differential drive (D) hotchkiss drive
Ans: D
27. In an automobile the magneto is basically
(A) d.c.generator (B) a.c.generator (C) transformer (D) capacitor
Ans: A
28. Scavenging is usually done to increase which of the following?
(A) power output (B) fuel consumption (C) thermal efficiency (D) speed
29. A good refrigerant should have
(A) Large latent heat of vaporization and low operating pressure
(B) Small latent heat of vaporization and high operating pressure
(C) Large latent heat of vaporization and high operating pressure
(D) Small latent heat of vaporization and low operating pressure
Ans: A
30. Advantage of gaseous fuel is that
(A) it can be stored easily (B) it can mix easily with air
(C) it can displace more air from the engine (D) all of the above mentioned
Ans: B
31. Radiator tubes are generally made of
(A) Steel (B) Brass (C) Cast iron (D) Plastics
Ans: B
32. For high speed engines, the cam follower should move with
(A) uniform velocity (B) simple harmonic motion (C) uniform acceleration and retardation (D) cycloidal motion
Ans: D
33. Engine starter motor is
(A) Single phase a.c. motor (B) d.c. series motor (C) d.c. shunt motor (D) synchronous motor
Ans: A
34. A spark plug with a black centre insulator indicates
(A) Over advanced ignition (B) Retarded ignition (C) Stuck-up choke valve in the carburetor (D) Excessive dwell
Ans: C
35. Interference is inherently absent in the following type of gears:
(A) involute (B) cycloid (C) stub (D) epicycloids
Ans: B
36. A bullet of mass 0.04kg moving with a speed of 90m/sec, enters a heavy wooden block and is stopped after a distance of 60cms.The average resistive force exerted by the block of bullet is:
(A) 170N (B) 177N (C) 270N (D) None of the above
Ans: C
37. What does the reliability of the instrument mean?
(A) The time interval between two responses of the instrument (B) The degree of repeatability within specified limits
(C) The life of the instrument (D) None of the above
Ans: B
38. For the analysis of which of the following is a polarograph used
(A) Gases (B) Liquids (C) Solids (D) Moisture content
Ans: C
39. Which of the following is measured directly by the mass-spring seismic-sensors?
(A) force (B) velocity (C) displacement (D) acceleration
Ans: D
40. An optical gauge works on the principle of
(A) reflection of light rays (B) polarization of light rays
(C) interference of light rays (D) refraction of light rays
Ans: C
41. Tooth interference in an external involute spur gear pair can be reduced by
(A) decreasing centre distance between gear pair (B) decreasing module
(C) decreasing pressure angle (D) increasing number of gear teeth
Ans: D
42.Which of the following devices can be used for measuring torque?
(A) helical spring (B) flat spiral spring (C) bellows (D) Diaphragm
Ans: B
43. Deposit of carbon in the exhaust system
(A) will increase back pressure (B) will reduce back pressure
(C) will have no effect on back pressure (D) will result in black smoke
Ans: A
44. The instruments used for the measurement of pressure is/are
(A) bellows (B) diaphragms (C) fiber optic pressure sensors (D) all of these
Ans: D
45.Erratic steering is caused due to
(A) worn out brake lining (B) broken or bent steering arms or knuckles
(C) too tight spherical ball joints (D) insufficient lubricant
Ans: A
46. Atmospheric air at 35°C and 60% RH can be brought to 20°C and 60% RH by (A) cooling and dehumidification process (B) cooling and humidification process
(C) adiabatic saturation process (D) sensible cooling process
Ans: A
47. Carbon residue in diesel oil should not be more than
(A) 1% (B) 0.5% (C) 0.1% (D) 0.01%
Ans: C
48. For a glass plate transmissivity and reflectivity are specified as 0.86 and 0.08 respectively, the absorptivity of the glass plate is
(A) 0.86 (B) 0.08 (C) 1.00 (D) 0.06
Ans: D
49. Water in lubricating oil aids in
(A) decomposition (B) oxidation (C) formation of sludge (D) dilution
Ans: C
50. In a Diesel engine the duration between the time of injection and time of ignition is called
(A) spill cut off (B) delay period (C) period of injection (D) period of ignition
Ans: B
(A) gudgeon pin (B) crank pin (C) screw pin (D) none
Ans: A
2. The speedometer is driven from the gear box shaft called
(A) primary (B) counter (C) lay (D) main
Ans: D
3. In the specification of dimensions and fits,
(A) allowance is equal to bilateral tolerance
(B) allowance is equal to unilateral tolerance
(C) allowance is independent of tolerance
(D) allowance is equal to the difference between maximum and minimum dimension specified by the tolerance
Ans: C
4. In disc brake, the disc is attached to the
(A) wheel (B) axle (C) suspension system (D) none of the above
Ans: B
5. Calorific value of diesel oil is of the order of
(A) 3000 kcal/kg (B) 5000 kcal/kg (C) 7500 kcal/kg (D) 10000 kcal/kg
Ans: D
6. Which one of the following modes of heat transfer would take place predominantly from boiler furnace to water wall?
(A) convection (B) conduction (C) radiation (D) conduction and convection
Ans: C
7. In force feed lubrication system the device used to guard against excessive oil pressure is known as
(A) release chamber (B) balancer (C) relief valve (D) stop valve
Ans: C
8. The fins at the top of a motor cycle engine cylinder are longer than those at the bottom because
(A) hot air rises
(B) top is the hottest part
(C) they are in an exposed position
(D) extra strength is required at the top
Ans: B
9. During the gear tooth cutting operation, the undercutting may occur, due to the corners of the cutter biting into the true involute curve on the flank of the tooth, this is called interference. It can be avoided by
(A) increasing the addendum on the pinion and reducing on the gear wheel (B) increasing the addendum on both pinion and gear wheel
(C) reducing the addendum on both pinion and gear wheel (D) None of the above
Ans: A
10. Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as;
(A) cold shut (B) swell (C) sand wash (D) scab
Ans: A
11. A jet engine works on the principle of
(A) Conservation of energy (B) Conservation of mass
(C) Conservation of linear momentum (D) Conservation of angular momentum
Ans: C
12. Due to which of the following the artificial satellite stays in orbit around the earth
(A) equilibrium between forces of attraction due to earth and other planet (B) upward pull of satellite
(C) centripetal force provided by earth’s gravitational acceleration (D) negligible earth’s gravitational field
Ans: C
13. Wien’s displacement law is useful in explaining
(A) displacement of celestial bodies (B) relative motion between electrons
(C) changing of colour of heated iron (D) none of the above
Ans: C
14. The vertical feed mechanism in a drilling machine uses
(A) rack and pinion (B) spur gears (C) helical gears (D) bevel gears
Ans: C
15. A heat engine using lake water at 12°C as source and surrounding atmosphere at 2°C as sink executes 1080 cycles per minute. If the amount of heat drawn per cycle is 57 J, then the output of the engine will be
(A) 66W (B) 56W (C) 46W (D) 36W
Ans: D
16. External taper can be obtained by
(A) taper attachment (B) form tool (C) compound rest (D) tail stock offset
Ans: D
17. Disposable patterns are made of
(A) wood (B) rubber (C) metal (D) polystyrene
Ans: D
18. In the cam, the distance between the base circle and the nose is called
(A) flank (B) lobe (C) none (D) lift
Ans: D
19. The most popular device for measuring engine output is_______
(A) pneumatic dynamometer (B) hydraulic dynamometer (C) electric dynamometer (D) None of the above
Ans: B
20. A turbo charger is driven by the__________ energy of the engine.
(A) exhaust (B) electrical (C) pneumatic (D) escape
Ans: A
21. Column I gives the different terms related to combustion while Column II gives the outcome of the event that follows. Match Column-I with Column-II and select the correct answers:
Column I Column II
P. Association 1. Pseudo shock
Q. Dissociation 2. Knock
R. Flame front 3. Endothermic
S. Abnormal Combustion 4. Exothermic
(A) P-3, Q-4, R-1, S-2
(B) P-4, Q-3, R-1, S-2
(C) P-3, Q-4, R-2, S-1
(D) P-4, Q-3, R-2, S-1
Ans: B
22. Total Quality Management (TQM) focuses on
(A) Employee (B) Customer (C) both A and B (D) none
Ans: C
23. Which of the following is responsible for quality objective?
(A) Top level management (B) Frontline management (C) Middle level management (D) All of them
Ans: A
24. For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in
(A) enthalpy (B) entropy (C) temperature (D) internal energy
Ans: D
25. A single cylinder, four-stroke engine is rotating at 2000 r.p.m. The number of power strokes occurring in one minute is
(A) 500 (B) 1000 (C) 2000 (D) 4000
Ans: B
26. The rear end suspension arrangement in which rear end torque is absorbed by the spring is called the
(A) torque tube drive (B) hooks drive (C) differential drive (D) hotchkiss drive
Ans: D
27. In an automobile the magneto is basically
(A) d.c.generator (B) a.c.generator (C) transformer (D) capacitor
Ans: A
28. Scavenging is usually done to increase which of the following?
(A) power output (B) fuel consumption (C) thermal efficiency (D) speed
29. A good refrigerant should have
(A) Large latent heat of vaporization and low operating pressure
(B) Small latent heat of vaporization and high operating pressure
(C) Large latent heat of vaporization and high operating pressure
(D) Small latent heat of vaporization and low operating pressure
Ans: A
30. Advantage of gaseous fuel is that
(A) it can be stored easily (B) it can mix easily with air
(C) it can displace more air from the engine (D) all of the above mentioned
Ans: B
31. Radiator tubes are generally made of
(A) Steel (B) Brass (C) Cast iron (D) Plastics
Ans: B
32. For high speed engines, the cam follower should move with
(A) uniform velocity (B) simple harmonic motion (C) uniform acceleration and retardation (D) cycloidal motion
Ans: D
33. Engine starter motor is
(A) Single phase a.c. motor (B) d.c. series motor (C) d.c. shunt motor (D) synchronous motor
Ans: A
34. A spark plug with a black centre insulator indicates
(A) Over advanced ignition (B) Retarded ignition (C) Stuck-up choke valve in the carburetor (D) Excessive dwell
Ans: C
35. Interference is inherently absent in the following type of gears:
(A) involute (B) cycloid (C) stub (D) epicycloids
Ans: B
36. A bullet of mass 0.04kg moving with a speed of 90m/sec, enters a heavy wooden block and is stopped after a distance of 60cms.The average resistive force exerted by the block of bullet is:
(A) 170N (B) 177N (C) 270N (D) None of the above
Ans: C
37. What does the reliability of the instrument mean?
(A) The time interval between two responses of the instrument (B) The degree of repeatability within specified limits
(C) The life of the instrument (D) None of the above
Ans: B
38. For the analysis of which of the following is a polarograph used
(A) Gases (B) Liquids (C) Solids (D) Moisture content
Ans: C
39. Which of the following is measured directly by the mass-spring seismic-sensors?
(A) force (B) velocity (C) displacement (D) acceleration
Ans: D
40. An optical gauge works on the principle of
(A) reflection of light rays (B) polarization of light rays
(C) interference of light rays (D) refraction of light rays
Ans: C
41. Tooth interference in an external involute spur gear pair can be reduced by
(A) decreasing centre distance between gear pair (B) decreasing module
(C) decreasing pressure angle (D) increasing number of gear teeth
Ans: D
42.Which of the following devices can be used for measuring torque?
(A) helical spring (B) flat spiral spring (C) bellows (D) Diaphragm
Ans: B
43. Deposit of carbon in the exhaust system
(A) will increase back pressure (B) will reduce back pressure
(C) will have no effect on back pressure (D) will result in black smoke
Ans: A
44. The instruments used for the measurement of pressure is/are
(A) bellows (B) diaphragms (C) fiber optic pressure sensors (D) all of these
Ans: D
45.Erratic steering is caused due to
(A) worn out brake lining (B) broken or bent steering arms or knuckles
(C) too tight spherical ball joints (D) insufficient lubricant
Ans: A
46. Atmospheric air at 35°C and 60% RH can be brought to 20°C and 60% RH by (A) cooling and dehumidification process (B) cooling and humidification process
(C) adiabatic saturation process (D) sensible cooling process
Ans: A
47. Carbon residue in diesel oil should not be more than
(A) 1% (B) 0.5% (C) 0.1% (D) 0.01%
Ans: C
48. For a glass plate transmissivity and reflectivity are specified as 0.86 and 0.08 respectively, the absorptivity of the glass plate is
(A) 0.86 (B) 0.08 (C) 1.00 (D) 0.06
Ans: D
49. Water in lubricating oil aids in
(A) decomposition (B) oxidation (C) formation of sludge (D) dilution
Ans: C
50. In a Diesel engine the duration between the time of injection and time of ignition is called
(A) spill cut off (B) delay period (C) period of injection (D) period of ignition
Ans: B
51. What is the process of removing metal by a milling cutter which is rotated against the direction of travel of the work piece, called?
(A) down milling (B) up milling (C) end milling (D) face milling
Ans: B
52. In an alternator, at lagging power factor, the generated voltage per phase, as compared to that at unity power factor
(A) must be same as terminal voltage (B) must be less than the terminal voltage
(C) must be more than the terminal voltage (D) must be 1.41 time the terminal voltage
Ans: C
53. What is the effect of reactive gyroscopic couple when an aeroplane takes a right turn and propeller rotates in anticlockwise direction?
(A) the nose and tail of the aeroplane are in horizontal plane (B) the nose of the aeroplane is raised and tail is dipped
(C) the nose of the aeroplane is dipped and tail is raised (D) none of the above
Ans: C
54. Which of the following road signs are used to guide road user along routes to make the road travel easier, safe and pleasant?
(A) Mandatory signs (B) Information signs (C) Cautionary signs (D) All of the above
Ans: B
55. Circumferential grooves on tyres
(A) Lessen the danger of skidding (B) Increase load carrying capacity
(C) Provide good traction (D) Remove any stones etc. from sticking to the tyre
Ans: A
56. The gear train usually employed in clocks is a
(A) Reverted gear train (B) simple gear train (C) Sun and planet gear (D) differential gear
Ans: A
57. If the battery polarity is reversed on a vehicle fitted with an alternator, the effect will be
(A) The fan belt will slip (B) The cut out will not operate
(C) The lights will be dimmer than normal (D) The semi-conductor devices will be damaged
Ans: B
58. If brake wheels get locked before the vehicle stops, the vehicle is said to be
(A) Slipping (B) Rubbing (C) Sliding (D) Skidding
Ans: D
59. CLA value and RMS value are used for measurement of
(A) Metal hardness (B) Sharpness of tool edge (C) Surface dimensions (D) Surface roughness
Ans: D
60. Too much toe-in will be noticed by
(A) excessive tyre wear because of taking corners (B) steering wander
(C) feathering of tyres (D) light steering
Ans: A
61. Air cooling is used for Freon compressors whereas water jacketing is adopted for cooling ammonia compressors. This is because
(A) latent heat of ammonia is higher than that of Freon
(B) thermal conductivity of water is higher than that of air
(C) specific heat of water is higher than that of air
(D) of the larger superheat horn of ammonia compression cycle
Ans: A
62. For S.I. engines fuel most preferred is
(A) Aromatics (B) Paraffins (C) Olefins (D) Naphthenes
Ans: A
63. In the following system, lubricating oil is carried in separate tanks from where it is fed to the engine
(A) mist lubrication system (B) wet sump system (C) dry sump system (D) splash system
Ans: C
64.The reason why petrol flows from the float chamber to the venturi is because
(A) of the difference in pressure (B) of the difference in level (C) the float lever is higher (D) the air sucks out the petrol
Ans: A
65. For a commercial new vehicle the initial fitness certificate is valid for
(A) 15 years (B) 10 years (C) 5 years (D) 2 years
Ans: D
66. For maximum specific output of a constant volume cycle (Otto cycle)
(A) The working fluid should be air
(B) The speed should be high
(C) Suction temperature should be high
(D) Temperature of the working fluid at the end of compression and expansion should be equal
Ans: D
67. When choke is applied the fuel comes out from the
(A) Main jet (B) Idle port (C) Transfer port (D) Progression hole
Ans: A
68. Which one of the following statements in the context of balancing in engines is correct?
(A) Magnitude of the primary unbalancing force is less than the secondary unbalancing force
(B) The primary unbalancing force attains its maximum value twice in one revolution of the crank
(C) The hammer blow in the locomotive engines occurs due to unbalanced force along the line of stroke of the piston
(D) The unbalanced force due to reciprocating masses varies in magnitude and direction
Ans: B
69. 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
70. Brake lining is mounted on
(A) Brake shoe (B) Brake drum (C) Master cylinder (D) Wheel cylinder
Ans: A
71. The working surface above the pitch surface of the gear tooth is termed as
(A) Addendum (B) Dedendum (C) Flank (D) Face
Ans: C
72. The frequency of a vibrating contact type regulator for d.c. generator is
(A) 20 per second (B) 200 per second (C) 20 per minute (D) 200 per minute
Ans: B
73. Rate at which angular displacement changes with time is called
(A) angular displacement (B) angular velocity (C) angular acceleration (D) angular speed
Ans: B
74. The tilting of the front wheels away from the vertical is called
(A) Caster (B) Camber (C) Toe-in (D) Toe-out
Ans: B
75. The quantity of air-petrol mixture that enters the engine cylinder is regulated by the
(A) Throttle (B) Strangler (C) Float (D) Needle valve
Ans: A
76 In summer, air may be cooled and dehumidified by spraying chilled water to air in the form of mist. The minimum temperature to which air may be cooled is the
(A) Wet bulb temperature (B) Adiabatic saturation temperature (C) Apparatus dew point (D) Dry bulb temperature
Ans: C
77.Hydrocarbons are decomposed into smaller hydrocarbons by
(A) Reforming (B) Refining (C) Cracking (D) Polymerization
Ans: C
78. In shell and tube heat exchanger, baffles are mainly used to
(A) Increase the mixing of fluid (B) Increase the heat transfer area
(C) Deflect the flow in desired direction (D) Reduce fouling of the tube surface
Ans: B
79. For balancing single cylinder engine a counter weight is added to
(A) Piston (B) Connecting rod (C) Crankshaft (D) Gudgeon pin
Ans: C
80. In an alternator the magnetic field is produced in the
(A) Rotor (B) Stator (C) Frame (D) Regulator
Ans: A
81. The number of turns in the starting winding of a capacitor start motor as compared to that of split phase motor is
(A) same (B) more (C) less (D) none of the above
Ans: B
82. Which one of the following can completely balance several masses revolving in different planes on a shaft?
(A) A single mass in one of the planes of the revolving masses (B) A single mass in any one plane
(C) Two masses in any two planes (D) Two equal masses in any two planes
Ans: C
83. Large speed reductions (greater than 20) in one stage of a gear train are possible through
(A) spur gearing (B) worm gearing (C) bevel gearing (D) helical gearing
Ans: B
84. An axle is located on a leaf spring by a
(A) U-bolt (B) spring clip (C) centre bolt (D) shackle pin
Ans: C
85. The following is known as ‘Breakerless Ignition System’
(A) Battery coil ignition system (B) Magneto Ignition system (C) Electronic Ignition system (D) Capacitive discharge Ignition system
Ans: C
86. Tolerances are specified
(A) to obtain desired fits (B) because it is not possible to manufacture a size exactly
(C) to obtain higher accuracy (D) to have proper allowances
Ans: B
87. In Disc clutch, the clutch disc acts as a
(A) driving member (B) driven member (C) neutral member (D) any of the above
Ans: B
88. The purpose of thermostat in an engine cooling system is to
(A) Prevent the coolant from cooling (B) Allow the engine to warm up quickly
(C) Pressurize the system to raise the boiling point (D) Indicate to the driver the coolant temperature
Ans: B
89. A single cylinder four stroke engine is rotating at 2000 rpm. The number of power strokes occurring in one minute is
(A) 500 (B) 1000 (C) 2000 (D) 4000
Ans: D
90. The ratio between Oxygen and Acetylene gases for neutral flame in gas welding is
(A) 2 : 1 (B) 1 : 2 (C) 1 : 1 (D) 4 : 1
Ans: C
91. When one of the links of a kinematic chain is fixed, the chain is known as a
(A) Structure (B) Mechanism (C) Inversion (D) Machine
Ans: B
92. Which one of the following represents open thermodynamic system?
(A) manual ice cream freezer (B) centrifugal pump (C) pressure cooker (D) bomb calorimeter
Ans: B
93. The violation of which of the following road safety signs is a legal offence?
(A) Mandatory signs (B) Cautionary signs (C) Information signs (D) All of the above
Ans: A
94. When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
(A) to move the ship towards star-board (B) to move the ship towards port side
(C) to raise the bow and lower the stern (D) to raise the stern and lower the bow
Ans: A
95. The torque tube is a tubular member which encloses the
(A) propeller shaft (B) half shafts (C) differential (D) axle
Ans: A
96. Benefit of 5S system is
(A) Increase in productivity (B) Increase in quality (C) Reduction in process variability (D) All the above
Ans: D
97. Number of defective parts per million (ppm) in six sigma is
(A) 78 (B) 3.4 (C) 110 (D) 12
Ans: B
98. Which ISO standard is used in international automobile companies to set automotive quality system standards?
(A) ISO 14000 (B) TS 16949 (C) ISO 9000 (D) none of the above
Ans: B
99. The De-Morgan Law for addition in Boolean algebra is given by
(A) (x,y)’= x’y’ (B) (x+y)’ = x’+y’ (C) (x+y)’ = x’y’ (D) (x+y)’= x y
Ans: C
100. Bharat Stage emission standards: BS-VI will have sulphur in ppm
(A) 10 (B) 18 (C) 20 (D) 50
Ans: B
(A) down milling (B) up milling (C) end milling (D) face milling
Ans: B
52. In an alternator, at lagging power factor, the generated voltage per phase, as compared to that at unity power factor
(A) must be same as terminal voltage (B) must be less than the terminal voltage
(C) must be more than the terminal voltage (D) must be 1.41 time the terminal voltage
Ans: C
53. What is the effect of reactive gyroscopic couple when an aeroplane takes a right turn and propeller rotates in anticlockwise direction?
(A) the nose and tail of the aeroplane are in horizontal plane (B) the nose of the aeroplane is raised and tail is dipped
(C) the nose of the aeroplane is dipped and tail is raised (D) none of the above
Ans: C
54. Which of the following road signs are used to guide road user along routes to make the road travel easier, safe and pleasant?
(A) Mandatory signs (B) Information signs (C) Cautionary signs (D) All of the above
Ans: B
55. Circumferential grooves on tyres
(A) Lessen the danger of skidding (B) Increase load carrying capacity
(C) Provide good traction (D) Remove any stones etc. from sticking to the tyre
Ans: A
56. The gear train usually employed in clocks is a
(A) Reverted gear train (B) simple gear train (C) Sun and planet gear (D) differential gear
Ans: A
57. If the battery polarity is reversed on a vehicle fitted with an alternator, the effect will be
(A) The fan belt will slip (B) The cut out will not operate
(C) The lights will be dimmer than normal (D) The semi-conductor devices will be damaged
Ans: B
58. If brake wheels get locked before the vehicle stops, the vehicle is said to be
(A) Slipping (B) Rubbing (C) Sliding (D) Skidding
Ans: D
59. CLA value and RMS value are used for measurement of
(A) Metal hardness (B) Sharpness of tool edge (C) Surface dimensions (D) Surface roughness
Ans: D
60. Too much toe-in will be noticed by
(A) excessive tyre wear because of taking corners (B) steering wander
(C) feathering of tyres (D) light steering
Ans: A
61. Air cooling is used for Freon compressors whereas water jacketing is adopted for cooling ammonia compressors. This is because
(A) latent heat of ammonia is higher than that of Freon
(B) thermal conductivity of water is higher than that of air
(C) specific heat of water is higher than that of air
(D) of the larger superheat horn of ammonia compression cycle
Ans: A
62. For S.I. engines fuel most preferred is
(A) Aromatics (B) Paraffins (C) Olefins (D) Naphthenes
Ans: A
63. In the following system, lubricating oil is carried in separate tanks from where it is fed to the engine
(A) mist lubrication system (B) wet sump system (C) dry sump system (D) splash system
Ans: C
64.The reason why petrol flows from the float chamber to the venturi is because
(A) of the difference in pressure (B) of the difference in level (C) the float lever is higher (D) the air sucks out the petrol
Ans: A
65. For a commercial new vehicle the initial fitness certificate is valid for
(A) 15 years (B) 10 years (C) 5 years (D) 2 years
Ans: D
66. For maximum specific output of a constant volume cycle (Otto cycle)
(A) The working fluid should be air
(B) The speed should be high
(C) Suction temperature should be high
(D) Temperature of the working fluid at the end of compression and expansion should be equal
Ans: D
67. When choke is applied the fuel comes out from the
(A) Main jet (B) Idle port (C) Transfer port (D) Progression hole
Ans: A
68. Which one of the following statements in the context of balancing in engines is correct?
(A) Magnitude of the primary unbalancing force is less than the secondary unbalancing force
(B) The primary unbalancing force attains its maximum value twice in one revolution of the crank
(C) The hammer blow in the locomotive engines occurs due to unbalanced force along the line of stroke of the piston
(D) The unbalanced force due to reciprocating masses varies in magnitude and direction
Ans: B
69. 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
70. Brake lining is mounted on
(A) Brake shoe (B) Brake drum (C) Master cylinder (D) Wheel cylinder
Ans: A
71. The working surface above the pitch surface of the gear tooth is termed as
(A) Addendum (B) Dedendum (C) Flank (D) Face
Ans: C
72. The frequency of a vibrating contact type regulator for d.c. generator is
(A) 20 per second (B) 200 per second (C) 20 per minute (D) 200 per minute
Ans: B
73. Rate at which angular displacement changes with time is called
(A) angular displacement (B) angular velocity (C) angular acceleration (D) angular speed
Ans: B
74. The tilting of the front wheels away from the vertical is called
(A) Caster (B) Camber (C) Toe-in (D) Toe-out
Ans: B
75. The quantity of air-petrol mixture that enters the engine cylinder is regulated by the
(A) Throttle (B) Strangler (C) Float (D) Needle valve
Ans: A
76 In summer, air may be cooled and dehumidified by spraying chilled water to air in the form of mist. The minimum temperature to which air may be cooled is the
(A) Wet bulb temperature (B) Adiabatic saturation temperature (C) Apparatus dew point (D) Dry bulb temperature
Ans: C
77.Hydrocarbons are decomposed into smaller hydrocarbons by
(A) Reforming (B) Refining (C) Cracking (D) Polymerization
Ans: C
78. In shell and tube heat exchanger, baffles are mainly used to
(A) Increase the mixing of fluid (B) Increase the heat transfer area
(C) Deflect the flow in desired direction (D) Reduce fouling of the tube surface
Ans: B
79. For balancing single cylinder engine a counter weight is added to
(A) Piston (B) Connecting rod (C) Crankshaft (D) Gudgeon pin
Ans: C
80. In an alternator the magnetic field is produced in the
(A) Rotor (B) Stator (C) Frame (D) Regulator
Ans: A
81. The number of turns in the starting winding of a capacitor start motor as compared to that of split phase motor is
(A) same (B) more (C) less (D) none of the above
Ans: B
82. Which one of the following can completely balance several masses revolving in different planes on a shaft?
(A) A single mass in one of the planes of the revolving masses (B) A single mass in any one plane
(C) Two masses in any two planes (D) Two equal masses in any two planes
Ans: C
83. Large speed reductions (greater than 20) in one stage of a gear train are possible through
(A) spur gearing (B) worm gearing (C) bevel gearing (D) helical gearing
Ans: B
84. An axle is located on a leaf spring by a
(A) U-bolt (B) spring clip (C) centre bolt (D) shackle pin
Ans: C
85. The following is known as ‘Breakerless Ignition System’
(A) Battery coil ignition system (B) Magneto Ignition system (C) Electronic Ignition system (D) Capacitive discharge Ignition system
Ans: C
86. Tolerances are specified
(A) to obtain desired fits (B) because it is not possible to manufacture a size exactly
(C) to obtain higher accuracy (D) to have proper allowances
Ans: B
87. In Disc clutch, the clutch disc acts as a
(A) driving member (B) driven member (C) neutral member (D) any of the above
Ans: B
88. The purpose of thermostat in an engine cooling system is to
(A) Prevent the coolant from cooling (B) Allow the engine to warm up quickly
(C) Pressurize the system to raise the boiling point (D) Indicate to the driver the coolant temperature
Ans: B
89. A single cylinder four stroke engine is rotating at 2000 rpm. The number of power strokes occurring in one minute is
(A) 500 (B) 1000 (C) 2000 (D) 4000
Ans: D
90. The ratio between Oxygen and Acetylene gases for neutral flame in gas welding is
(A) 2 : 1 (B) 1 : 2 (C) 1 : 1 (D) 4 : 1
Ans: C
91. When one of the links of a kinematic chain is fixed, the chain is known as a
(A) Structure (B) Mechanism (C) Inversion (D) Machine
Ans: B
92. Which one of the following represents open thermodynamic system?
(A) manual ice cream freezer (B) centrifugal pump (C) pressure cooker (D) bomb calorimeter
Ans: B
93. The violation of which of the following road safety signs is a legal offence?
(A) Mandatory signs (B) Cautionary signs (C) Information signs (D) All of the above
Ans: A
94. When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
(A) to move the ship towards star-board (B) to move the ship towards port side
(C) to raise the bow and lower the stern (D) to raise the stern and lower the bow
Ans: A
95. The torque tube is a tubular member which encloses the
(A) propeller shaft (B) half shafts (C) differential (D) axle
Ans: A
96. Benefit of 5S system is
(A) Increase in productivity (B) Increase in quality (C) Reduction in process variability (D) All the above
Ans: D
97. Number of defective parts per million (ppm) in six sigma is
(A) 78 (B) 3.4 (C) 110 (D) 12
Ans: B
98. Which ISO standard is used in international automobile companies to set automotive quality system standards?
(A) ISO 14000 (B) TS 16949 (C) ISO 9000 (D) none of the above
Ans: B
99. The De-Morgan Law for addition in Boolean algebra is given by
(A) (x,y)’= x’y’ (B) (x+y)’ = x’+y’ (C) (x+y)’ = x’y’ (D) (x+y)’= x y
Ans: C
100. Bharat Stage emission standards: BS-VI will have sulphur in ppm
(A) 10 (B) 18 (C) 20 (D) 50
Ans: B