AUTOMOBILE ENGINEERING- PAGE 1
AUTOMOBILE ENGINEERING- PAGE 1
1. To enrich the mixture to a Degree necessary to start the Petrol Engine, the carburettor is provided with __________ system.
(A) Main metering (B) Idling (C) Choke (D) Acceleration
Ans: C
2. Carburettor __________ is intended to Prevent Enrichment of the Mixture in case of clogging of Air cleaner.
(A) Balancing (B) Flooding (C) Tuning (D) Compensation
Ans: A
3. In Diesel Engine __________ delivers finely divided atomized fuel under High pressure to the combustion chamber.
(A) Governor (B) Injector
(C) Fuel feed pump (D) Fuel injection pump
Ans: B
4. __________ valve regulates the flow of water to the radiator.
(A) PCV (B) Pressure Relief (C) Vacuum (D) Thermostat
Ans: D
5. __________ is a pipe line from oil pump to the oil stored in the oil pan.
(A) Oil filter (B) Oil Gallery
(C) Oil pump pick up (D) Pressure relief valve
Ans: C
6. The spindle of the steering knuckle carries the __________ mounted on tapered roller bearing. (
A) Tie Rod (B) Wheel Hub (C) Wheel Rim (D) Brake Drum
Ans: B
7. __________ provide a rigid structural foundation for vehicle body and A solid anchorage for suspension system.
(A) Upholstery (B) Frame
(C) Front Axle (D) Engine mountings
Ans: B
8. __________ occurs when the wheel hits a Dip or Hole and moves downward.
(A) Rebound (B) Wobble (C) Jounce (D) Rolling
Ans: A
9. Amount of load necessary to Deflect the spring is termed __________ .
(A) Sprung weight (B) Unsprung weight (C) Axle load (D) Spring rate
Ans: D
10. Short long arm suspension is commonly known as __________ system.
(A) Torsion Bar (B) Leaf spring (C) A-Frame wish bone (D) Mac pherson strut suspension
Ans: C
11. __________ uses sliding pair, which means more friction and easy wearing of steering components.
(A) Davis steering (B) Power steering (C) Rack and Pinion steering (D) Ackerman steering
Ans: A
12. __________ connects the two front stub axles through an arm.
(A) Pitman arm (B) Tie rod (C) Steering column (D) Torsion bar
Ans: B
13. Ratio of steering wheel angle turned to stub axle angle turned is called __________ .
(A) Turning Radius (B) Toe in (C) Steering Gear Ratio (D) Aspect Ratio
Ans: C
(A) Main metering (B) Idling (C) Choke (D) Acceleration
Ans: C
2. Carburettor __________ is intended to Prevent Enrichment of the Mixture in case of clogging of Air cleaner.
(A) Balancing (B) Flooding (C) Tuning (D) Compensation
Ans: A
3. In Diesel Engine __________ delivers finely divided atomized fuel under High pressure to the combustion chamber.
(A) Governor (B) Injector
(C) Fuel feed pump (D) Fuel injection pump
Ans: B
4. __________ valve regulates the flow of water to the radiator.
(A) PCV (B) Pressure Relief (C) Vacuum (D) Thermostat
Ans: D
5. __________ is a pipe line from oil pump to the oil stored in the oil pan.
(A) Oil filter (B) Oil Gallery
(C) Oil pump pick up (D) Pressure relief valve
Ans: C
6. The spindle of the steering knuckle carries the __________ mounted on tapered roller bearing. (
A) Tie Rod (B) Wheel Hub (C) Wheel Rim (D) Brake Drum
Ans: B
7. __________ provide a rigid structural foundation for vehicle body and A solid anchorage for suspension system.
(A) Upholstery (B) Frame
(C) Front Axle (D) Engine mountings
Ans: B
8. __________ occurs when the wheel hits a Dip or Hole and moves downward.
(A) Rebound (B) Wobble (C) Jounce (D) Rolling
Ans: A
9. Amount of load necessary to Deflect the spring is termed __________ .
(A) Sprung weight (B) Unsprung weight (C) Axle load (D) Spring rate
Ans: D
10. Short long arm suspension is commonly known as __________ system.
(A) Torsion Bar (B) Leaf spring (C) A-Frame wish bone (D) Mac pherson strut suspension
Ans: C
11. __________ uses sliding pair, which means more friction and easy wearing of steering components.
(A) Davis steering (B) Power steering (C) Rack and Pinion steering (D) Ackerman steering
Ans: A
12. __________ connects the two front stub axles through an arm.
(A) Pitman arm (B) Tie rod (C) Steering column (D) Torsion bar
Ans: B
13. Ratio of steering wheel angle turned to stub axle angle turned is called __________ .
(A) Turning Radius (B) Toe in (C) Steering Gear Ratio (D) Aspect Ratio
Ans: C
14. The rate of increase of pressure in liquid column towards vertically downward direction must be equal to the __________ of the fluid at that point.
(A) Specific volume (B) Specific weight (C) Specific gravity (D) None of the above
Ans: B
15. Total number of tools that can hold on a turret lathe is up to :
(A) 6 (B) 14 (C) 10 (D) 8
Ans: B
16. Dressing and truing related with :
(A) Grinding wheel (B) Milling cutter (C) Knurling tool (D) Gang drilling
Ans: A
17. Counter sinking is the operation of :
(A) Machining the entrance of the hole in a conical shape to accommodate screw head (B) Enlarging the hole with a boring tool (C) Making internal threads (D) Drilling stepped holes
Ans: A
18. __________ is the passage around the cylinder through which water is allowed to flow to cool the cylinder.
(A) Water Jacket (B) Port (C) Manifold (D) Fin
Ans: A
19. On an engine that drives an automatic transmission a __________ is used in the place of a flywheel.
(A) Back Plate (B) Harmonic Balancer
(C) Balance Shaft (D) Flex Plate
Ans: D
20. __________ Articulates the piston to the small end of the connecting rod.
(A) Eye Bolt (B) Wrist Pin (C) King Pin (D) Crank Pin
Ans: B
21. __________ are used to transmit the force from the camshaft to the push rods in an over head value engine.
(A) Tappets (B) Timing Gears (C) Rocker Arms (D) Valve Guides
Ans: A
22. According to Pascals law, “The intensity of pressure at any point in a liquid at rest, is __________ in all directions”.
(A) the same (B) half (C) one third (D) double
Ans: A
23. U - Tube manometers are used to measure __________ of the liquid flowing through a pipe.
(A) discharge (B) velocity (C) density (D) pressure
Ans: D
24. Which of the following device is used to measure the discharge through open channel ?
(A) Venturimeter (B) Orifice meter (C) Notches (D) Piezometer
Ans: C
25. The co-efficient of discharge (cd) of a venturimeter lies between the limits :
(A) 0.95 to 0.99 (B) 0.90 to 0.95 (C) 0.85 to 0.90 (D) 0.60 to 0.66
Ans: A
26. In an open channel flow, If the flow characteristics, such as, velocity of flow, depth of flow, rate of flow at any point do not change with respect to time, the flow is said to be _______ .
(A) Laminar flow (B) Uniform flow (C) Steady flow (D) Turbulent flow
Ans: C
27. In a Centrifugal pump, the sum of Suction head and Delivery head is called :
(A) Total head (B) Pressure head (C) Manometric head (D) Static head
Ans: D
28. Following is an example of roto dynamic pump :
(A) Reciprocating pump (B) Centrifugal pump (C) Gear pump (D) Lobe pump
Ans: B
29. A Kaplan turbine is a __________ .
(A) High speed Axial flow turbine (B) High head Mixed flow turbine (C) Low head Axial flow turbine (D) An Inward flow impulse turbine
Ans: C
30. In a reciprocating pump, If Qt=Theoretical discharge and Qa=Actual discharge, then the ratio Qt Qa Qt − is known as :
(A) Mechanical efficiency (B) Coefficient of discharge (C) Slip (D) Workdone
Ans: C
31. Reversible adiabatic process is also known as __________ .
(A) Isothermal process (B) Isobaric process (C) Isochoric process (D) Isentropic process
Ans: D
32. Otto cycle consists of __________ __________ process.
(A) Two adiabatic and Two constant volume (B) Two adiabatic and Two constant pressure (C) Two adiabatic and Two isothermal (D) None of the above
Ans: A
33. In a 4 - stroke cycle engine :
(A) there is one power stroke in each revolution of the crank shaft (B) there is one power stroke in every two revolutions of the crank shaft (C) there is one power stroke in each half revolution of the crank shaft (D) none of the above
Ans: B
34. A single cylinder 4 - stroke engine is rotating at 2000 rpm. The number of power strokes occurring per minute :
(A) 2000 (B) 500 (C) 1000 (D) 4000
Ans: C
35. Brake thermal efficiency is the ratio of :
(A) Brake power to Heat input of the engine (B) Brake power to Total fuel consumption of the engine (C) Brake power to Specific fuel consumption of the engine (D) Brake power to Indicated power of the engine
Ans: A
(A) Specific volume (B) Specific weight (C) Specific gravity (D) None of the above
Ans: B
15. Total number of tools that can hold on a turret lathe is up to :
(A) 6 (B) 14 (C) 10 (D) 8
Ans: B
16. Dressing and truing related with :
(A) Grinding wheel (B) Milling cutter (C) Knurling tool (D) Gang drilling
Ans: A
17. Counter sinking is the operation of :
(A) Machining the entrance of the hole in a conical shape to accommodate screw head (B) Enlarging the hole with a boring tool (C) Making internal threads (D) Drilling stepped holes
Ans: A
18. __________ is the passage around the cylinder through which water is allowed to flow to cool the cylinder.
(A) Water Jacket (B) Port (C) Manifold (D) Fin
Ans: A
19. On an engine that drives an automatic transmission a __________ is used in the place of a flywheel.
(A) Back Plate (B) Harmonic Balancer
(C) Balance Shaft (D) Flex Plate
Ans: D
20. __________ Articulates the piston to the small end of the connecting rod.
(A) Eye Bolt (B) Wrist Pin (C) King Pin (D) Crank Pin
Ans: B
21. __________ are used to transmit the force from the camshaft to the push rods in an over head value engine.
(A) Tappets (B) Timing Gears (C) Rocker Arms (D) Valve Guides
Ans: A
22. According to Pascals law, “The intensity of pressure at any point in a liquid at rest, is __________ in all directions”.
(A) the same (B) half (C) one third (D) double
Ans: A
23. U - Tube manometers are used to measure __________ of the liquid flowing through a pipe.
(A) discharge (B) velocity (C) density (D) pressure
Ans: D
24. Which of the following device is used to measure the discharge through open channel ?
(A) Venturimeter (B) Orifice meter (C) Notches (D) Piezometer
Ans: C
25. The co-efficient of discharge (cd) of a venturimeter lies between the limits :
(A) 0.95 to 0.99 (B) 0.90 to 0.95 (C) 0.85 to 0.90 (D) 0.60 to 0.66
Ans: A
26. In an open channel flow, If the flow characteristics, such as, velocity of flow, depth of flow, rate of flow at any point do not change with respect to time, the flow is said to be _______ .
(A) Laminar flow (B) Uniform flow (C) Steady flow (D) Turbulent flow
Ans: C
27. In a Centrifugal pump, the sum of Suction head and Delivery head is called :
(A) Total head (B) Pressure head (C) Manometric head (D) Static head
Ans: D
28. Following is an example of roto dynamic pump :
(A) Reciprocating pump (B) Centrifugal pump (C) Gear pump (D) Lobe pump
Ans: B
29. A Kaplan turbine is a __________ .
(A) High speed Axial flow turbine (B) High head Mixed flow turbine (C) Low head Axial flow turbine (D) An Inward flow impulse turbine
Ans: C
30. In a reciprocating pump, If Qt=Theoretical discharge and Qa=Actual discharge, then the ratio Qt Qa Qt − is known as :
(A) Mechanical efficiency (B) Coefficient of discharge (C) Slip (D) Workdone
Ans: C
31. Reversible adiabatic process is also known as __________ .
(A) Isothermal process (B) Isobaric process (C) Isochoric process (D) Isentropic process
Ans: D
32. Otto cycle consists of __________ __________ process.
(A) Two adiabatic and Two constant volume (B) Two adiabatic and Two constant pressure (C) Two adiabatic and Two isothermal (D) None of the above
Ans: A
33. In a 4 - stroke cycle engine :
(A) there is one power stroke in each revolution of the crank shaft (B) there is one power stroke in every two revolutions of the crank shaft (C) there is one power stroke in each half revolution of the crank shaft (D) none of the above
Ans: B
34. A single cylinder 4 - stroke engine is rotating at 2000 rpm. The number of power strokes occurring per minute :
(A) 2000 (B) 500 (C) 1000 (D) 4000
Ans: C
35. Brake thermal efficiency is the ratio of :
(A) Brake power to Heat input of the engine (B) Brake power to Total fuel consumption of the engine (C) Brake power to Specific fuel consumption of the engine (D) Brake power to Indicated power of the engine
Ans: A
36. Morse test is conducted on a multi-cylinder engine to determine __________ .
(A) the mechanical efficiency of each cylinder (B) the volumetric efficiency of each cylinder (C) the brake power of each cylinder (D) the Indicated power of each cylinder
Ans: D
37. The statement “It is impossible to construct an engine working on cyclic process, whose sole purpose is to convert the whole heat energy supplied to it into an equivalent amount of work” is known as __________ .
(A) Clausius statement (B) Kelvin-Planck statement (C) Joule’s statement (D) Avagadro’s statement
Ans: B
38. The volumetric efficiency of a compressor is defined as :
(A) the ratio of swept volume of cylinder to the actual volume of air entering (B) the ratio of swept volume to the total volume of reservoir tank (C) the ratio of actual volume of air entering to the swept volume of cylinder (D) the ratio of actual volume of air entering to the total volume of reservoir tank
Ans: C
39. During an isothermal process, all properties of the working fluid changes except ________ .
(A) Pressure (B) Volume (C) Temperature (D) Entropy
Ans: C
40. Select the wrong set :
(A) Carburettor - Petrol engine (B) Two stroke engine - Ports (C) Air cooled engine - Fins (D) Diesel engine - Spark plug
Ans: D
41. The limit up to which Hook’s law is obeyed is called :
(A) Yield point (B) Braking point (C) Limit of proportionality (D) Ultimate point
Ans: C
42. The maximum angle of an inclined plane at which a body can remain in equilibrium on the plane entirely by the assistance of friction is called :
(A) Friction angle (B) Angle of repose (C) Co-efficient of friction (D) Cone of friction
Ans: B
43. In a simply supported beam with uniformly distributed load, shear force is maximum at the : (A) Support ends (B) Centre (C) Same at all the points (D) No shear force
Ans: A
44. Rough cutting, semifinishing and finishing operations are completed in a single stroke of tool pass by using :
(A) Boring tool (B) Reaming tool (C) Drilling tool (D) Broaching tool
Ans: D
45. The diameter of a rivet by Unwinn’s formula for a plate thickness of 9 mm :
(A) 12 mm (B) 15 mm (C) 24 mm (D) 18 mm
Ans: D
46. Point of Contraflexture is where :
(A) Bending moment is maximum (B) Bending moment is zero (C) Shear force is maximum (D) Shear force is zero
Ans: B
47. If the lathe spindle and lead screw rotate with same RPM while thread cutting operation. Then the pitch of thread of the work piece will be :
(A) Equal to the lead screw pitch
(B) Equal to half the pitch of lead screw
(C) Equal to the pitch of rack and pinion
(D) Equal to twice the lead screw pitch
Ans: A
48. Poisson’s ratio is defined as the :
(A) ratio of axial strain to transverse strain (B) ratio of shear stress to shear strain (C) modulus of ratio of transverse strain to axial strain (D) Ratio of direct stress to volumetric strain
Ans: C
49. The lead of a two start screw thread is equal to :
(A) pitch (B) twice of the pitch (C) half of the pitch (D) twice of the depth of thread
Ans: B
50. Horizontal force required to pull a body of weight of 200 N along a horizontal surface with a coefficient of friction of 0.2 is :
(A) 200 N (B) 100 N (C) 50 N (D) 40 N
Ans: D
51. Economiser in a steam boiler is used to :
(A) Increase the temperature of super heated steam (B) To indicate the water level inside the boiler (C) Heat the feed water by utilising the heat in the exhaust gases (D) Regulate the supply of water pumped into the boiler
Ans: C
52. The function of a moderator in a nuclear power plant is to :
(A) Absorb the thermal neutrons and control the chain reaction (B) Take away the heat from reactor to the heat exchanger (C) Store the fissionable material for better control of reaction (D) Slow down the fast moving fission neutrons
Ans: D
53. The function of a surge tank in a hydro-electric power plant is to :
(A) Carry the water to the turbine nozzle (B) Reduce the water hammer inside the penstock pipe occur during sudden clossure of the nozzle (C) Regulate the water flow rate to the turbine (D) Increase the workdone by reducing pressure head
Ans: B
54. If an engine lathe is equipped with a four stepped conepully head stock and back gear arrangement, then the total spindle speed obtained will be :
(A) 4 (B) 6 (C) 10 (D) 8
Ans: D
55. Positive back rake angle for a carbide tool is preferred for machining :
(A) Harder material (B) Softer material (C) Brittle material (D) All materials
Ans: B
(A) the mechanical efficiency of each cylinder (B) the volumetric efficiency of each cylinder (C) the brake power of each cylinder (D) the Indicated power of each cylinder
Ans: D
37. The statement “It is impossible to construct an engine working on cyclic process, whose sole purpose is to convert the whole heat energy supplied to it into an equivalent amount of work” is known as __________ .
(A) Clausius statement (B) Kelvin-Planck statement (C) Joule’s statement (D) Avagadro’s statement
Ans: B
38. The volumetric efficiency of a compressor is defined as :
(A) the ratio of swept volume of cylinder to the actual volume of air entering (B) the ratio of swept volume to the total volume of reservoir tank (C) the ratio of actual volume of air entering to the swept volume of cylinder (D) the ratio of actual volume of air entering to the total volume of reservoir tank
Ans: C
39. During an isothermal process, all properties of the working fluid changes except ________ .
(A) Pressure (B) Volume (C) Temperature (D) Entropy
Ans: C
40. Select the wrong set :
(A) Carburettor - Petrol engine (B) Two stroke engine - Ports (C) Air cooled engine - Fins (D) Diesel engine - Spark plug
Ans: D
41. The limit up to which Hook’s law is obeyed is called :
(A) Yield point (B) Braking point (C) Limit of proportionality (D) Ultimate point
Ans: C
42. The maximum angle of an inclined plane at which a body can remain in equilibrium on the plane entirely by the assistance of friction is called :
(A) Friction angle (B) Angle of repose (C) Co-efficient of friction (D) Cone of friction
Ans: B
43. In a simply supported beam with uniformly distributed load, shear force is maximum at the : (A) Support ends (B) Centre (C) Same at all the points (D) No shear force
Ans: A
44. Rough cutting, semifinishing and finishing operations are completed in a single stroke of tool pass by using :
(A) Boring tool (B) Reaming tool (C) Drilling tool (D) Broaching tool
Ans: D
45. The diameter of a rivet by Unwinn’s formula for a plate thickness of 9 mm :
(A) 12 mm (B) 15 mm (C) 24 mm (D) 18 mm
Ans: D
46. Point of Contraflexture is where :
(A) Bending moment is maximum (B) Bending moment is zero (C) Shear force is maximum (D) Shear force is zero
Ans: B
47. If the lathe spindle and lead screw rotate with same RPM while thread cutting operation. Then the pitch of thread of the work piece will be :
(A) Equal to the lead screw pitch
(B) Equal to half the pitch of lead screw
(C) Equal to the pitch of rack and pinion
(D) Equal to twice the lead screw pitch
Ans: A
48. Poisson’s ratio is defined as the :
(A) ratio of axial strain to transverse strain (B) ratio of shear stress to shear strain (C) modulus of ratio of transverse strain to axial strain (D) Ratio of direct stress to volumetric strain
Ans: C
49. The lead of a two start screw thread is equal to :
(A) pitch (B) twice of the pitch (C) half of the pitch (D) twice of the depth of thread
Ans: B
50. Horizontal force required to pull a body of weight of 200 N along a horizontal surface with a coefficient of friction of 0.2 is :
(A) 200 N (B) 100 N (C) 50 N (D) 40 N
Ans: D
51. Economiser in a steam boiler is used to :
(A) Increase the temperature of super heated steam (B) To indicate the water level inside the boiler (C) Heat the feed water by utilising the heat in the exhaust gases (D) Regulate the supply of water pumped into the boiler
Ans: C
52. The function of a moderator in a nuclear power plant is to :
(A) Absorb the thermal neutrons and control the chain reaction (B) Take away the heat from reactor to the heat exchanger (C) Store the fissionable material for better control of reaction (D) Slow down the fast moving fission neutrons
Ans: D
53. The function of a surge tank in a hydro-electric power plant is to :
(A) Carry the water to the turbine nozzle (B) Reduce the water hammer inside the penstock pipe occur during sudden clossure of the nozzle (C) Regulate the water flow rate to the turbine (D) Increase the workdone by reducing pressure head
Ans: B
54. If an engine lathe is equipped with a four stepped conepully head stock and back gear arrangement, then the total spindle speed obtained will be :
(A) 4 (B) 6 (C) 10 (D) 8
Ans: D
55. Positive back rake angle for a carbide tool is preferred for machining :
(A) Harder material (B) Softer material (C) Brittle material (D) All materials
Ans: B
56. The torque available at the contact between driving wheels and road is known as
A) Brake effort B) Tractive effort
C) Clutch effort D) None of these
Ans: B
57. During braking, the brake shoe is moved outward to force the lining against the
A) Wheel piston or cylinder B) Anchor pin
C) Brake drum D) Wheel rim or axle
Ans: C
58. The main function of an exhaust muffler is the
A) Optimization of exhaust efficiency
B) Reduction of exhaust noise
C) Reduction of nitrogen oxide in the exhaust gases
D) Reduction of the exhaust
Ans: B
59. In Diesel engines, the duration between the time of injection and the time of ignition is called
A) Spill cut-off B) Delay period C) Injection period D) Ignition period
Ans: B
60. An engine has a clearance volume of 100 cm3 and a swept volume of 800 cm3 . The compression ratio is
A) 7 : 1 B) 8 : 1 C) 9 : 1 D) 10 : 1
Ans: C
61. The component in the radiator of an automobile that increases the boiling point of water is
A) Drain plug B) Water jacket C) Vacuum valve D) Pressure cap
Ans: D
62. Which part of the automobile tyre is subjected to greatest flexing action ?
A) Bead B) Side wall C) Shoulder D) Tread
Ans: B
63. The function of a governor in automobiles is to
A) Limit the power B) Limit the vehicle speed C) Maintain constant engine speed D) Maximise the fuel economy
Ans: C
64. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
A) Too lean mixture B) Stoichiometric mixture C) Most economical mixture D) Too rich mixture
Ans: D
65. The crescent shaped cavity on the piston head top surface is called as
A) Piston oil hole B) Snap ring C) Valve recess D) Valve clearance
Ans: C
66. The characteristic that is enhanced by the use of cylinder sleeves is
A) Cooling efficiency B) Resistance to wear C) Lubrication performance D) None of these
Ans: B
67. The antiknock property of compression ignition engine fuel can be improved by adding
A) Tetraethyl lead B) Trimethyl pentane C) Amyl nitrate D) Hexadecane
Ans: C
68. The major purpose of an electronically controlled automatic transmission is that this type of transmission
A) Eliminates gear clutches
B) Eliminate the gear shaft lever
C) Reduces the number of automatic transmission components
D) Reduces shift shock and achieves more efficient transmission of engine torque
Ans: D
69. In a forced 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
70. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of
A) Section width to section height B) Section height to section width
C) Wheel diameter to section height D) Wheel diameter to section width
Ans: B
71. The advantage of the fuel injection system over the carburettor system is
A) Improved fuel efficiency B) Improved emission
C) Improved power output D) All of these
Ans: D
72. Which of the following indicates multi-grade oil ?
A) SAE30 B) API SF C) SAE20 W50 D) API50
Ans: C
73. The compression ratio in petrol engine is kept less than in Diesel engine because
A) It makes petrol engines lighter
B) Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C) Less compression ratio gives better performance
D) It is just customary to have less compression ratio in petrol engines
Ans: B
74. The service brakes employed in cars are generally operated
A) Mechanically B) Hydraulically C) Pneumatically D) None of these
Ans: B
75. The self ignition temperature of Diesel as compared to petrol is
A) Higher B) Lower
C) Same D) Depends on fuel quality
Ans: B
76. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
A) Supercharging B) Auto ignition C) Scavenging D) Detonation
Ans: A
77. The caster is called positive when the top of the king pin is inclined to the
A) Rear of the vehicle B) Front of the vehicle
C) Left of the vehicle D) Right of the vehicle
Ans: A
78. Why are pistons given a coating ?
A) To increase lubrication effect B) To conduct heat efficiently
C) To reduce weight D) To reduce possibility of scoring
Ans: D
79. The function of Positive Crankcase Ventilation (PCV) system is that it
A) Mixes fuel with air
B) Promotes combustion by creating a swirling movement in the air-fuel mixture
C) Returns blow by gases from the crankcase to the intake system
D) Feeds blow by gases to the exhaust manifold
Ans: C
80. The basic purpose of a Four Wheel Drive (4WD) system is that it
A) Delivers improved cornering on dry road surfaces
B) Eliminates the need of snow tyres, tyre chains, etc.
C) Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
D) Ensures that effective braking can be performed, even on slippery surfaces
Ans: C
81. The timing belt is attached to the camshaft pulley and
A) Timing belt drive pulley B) Distributor
C) Radiator fan pulley D) Alternator pulley
Ans: A
82. When the front wheels of a vehicle are locked during braking, then
A) Stopping distance becomes extremely long
B) Front tyres skid across the road surface and the vehicle spins around
C) Rear tyres skid across the road surface and the vehicle spins around
D) Driver loses control over the steering and the vehicle continues moving in its current direction
Ans: D
83. The best fuels for compression ignition engines are
A) Straight chain paraffin B) Aromatics
C) Branched chain paraffin D) Naphthalene
Ans: A
84. Damper is also known as
A) Shock absorber B) Torsion bar
C) Spring D) Radius rod
Ans: A
85. The effect of having excess camber is
A) Excessive steering alignment torque B) Hard steering
C) Too much traction D) Uneven tyre wear
Ans: D
86. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
A) 175 B) 65 C) 14 D) 82
Ans: B
87. In a hydraulic power steering system, the power steering pump is driven by a
A) Belt driven by camshaft B) Chain driven by crankshaft
C) Belt driven by drive-shaft D) Belt driven by crankshaft
Ans: D
88. The included angle is the sum of the
A) Camber and castor B) Castor and S.A.I.
C) Camber and S.A.I. D) Camber and toe in
Ans: C
89. Vulcanizing means
A) Heating rubber under pressure B) Spraying with special paint
C) Melting rubber while stirring it D) None of these
Ans: A
90. When turning a corner
A) The front wheels are toeing out
B) The front wheels are turning on different angles
C) The inside front wheels has a greater angle than the outside wheel
D) All of the above
Ans: D
91. When a gear box has four forward speeds and one reverse speed, it is said to be a
A) 3-speed gear box B) 4-speed gear box
C) 5-speed gear box D) 6-speed gear box
Ans: B
92. The basic purpose of providing caster angle on wheels is to
A) Prevent uneven tyre wear
B) Maintain directional control
C) Bring the road contact of the tyre under the point of load
D) Compensate for wear in the steering linkage
Ans: B
93. When the piston is at T.D.C. the volume above the piston in the combustion chamber is the
A) Clearance volume B) Cylinder volume C) Exhaust volume D) None of these
Ans: A
94. Incorrect Steering Axis Inclination (S.A.I.) causes
A) Tendency to assume toe-out orientation
B) Generation of a braking effect at tight corners
C) Poor recovery of the steering wheel after making a turn
D) The vehicle to pull to the side of lesser inclination
Ans: C
95. The correct way to rectify an imbalanced wheel is to
A) Adjust the tyre pressure
B) Rotate the tyres
C) Adjust the damper spring tension
D) Attach appropriate weights to the wheel at appropriate positions
Ans: D
96. The fuel that detonates easily, is
A) N-heptane B) Iso-octane C) Benzene D) Alcohol
Ans: A
97. The parking brake generally acts on
A) Front wheels B) Rear wheels C) Front and rear wheels D) Propeller shaft
Ans: B
98. The commonly used antifreeze solution in automobiles is
A) Carbon disulphide B) Ethylene glycol C) Ammonium chloride D) Freon-12
Ans: B
99. Which of the following oil is more viscous ?
A) SAE 30 B) SAE 40 C) SAE 70 D) SAE 80
Ans: D
100. The painting of automobiles is done to
A) Prevent rust from growing on the body
B) Improve its external appearance
C) Retain the characteristics of steel for long
D) All of these
Ans: D
A) Brake effort B) Tractive effort
C) Clutch effort D) None of these
Ans: B
57. During braking, the brake shoe is moved outward to force the lining against the
A) Wheel piston or cylinder B) Anchor pin
C) Brake drum D) Wheel rim or axle
Ans: C
58. The main function of an exhaust muffler is the
A) Optimization of exhaust efficiency
B) Reduction of exhaust noise
C) Reduction of nitrogen oxide in the exhaust gases
D) Reduction of the exhaust
Ans: B
59. In Diesel engines, the duration between the time of injection and the time of ignition is called
A) Spill cut-off B) Delay period C) Injection period D) Ignition period
Ans: B
60. An engine has a clearance volume of 100 cm3 and a swept volume of 800 cm3 . The compression ratio is
A) 7 : 1 B) 8 : 1 C) 9 : 1 D) 10 : 1
Ans: C
61. The component in the radiator of an automobile that increases the boiling point of water is
A) Drain plug B) Water jacket C) Vacuum valve D) Pressure cap
Ans: D
62. Which part of the automobile tyre is subjected to greatest flexing action ?
A) Bead B) Side wall C) Shoulder D) Tread
Ans: B
63. The function of a governor in automobiles is to
A) Limit the power B) Limit the vehicle speed C) Maintain constant engine speed D) Maximise the fuel economy
Ans: C
64. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
A) Too lean mixture B) Stoichiometric mixture C) Most economical mixture D) Too rich mixture
Ans: D
65. The crescent shaped cavity on the piston head top surface is called as
A) Piston oil hole B) Snap ring C) Valve recess D) Valve clearance
Ans: C
66. The characteristic that is enhanced by the use of cylinder sleeves is
A) Cooling efficiency B) Resistance to wear C) Lubrication performance D) None of these
Ans: B
67. The antiknock property of compression ignition engine fuel can be improved by adding
A) Tetraethyl lead B) Trimethyl pentane C) Amyl nitrate D) Hexadecane
Ans: C
68. The major purpose of an electronically controlled automatic transmission is that this type of transmission
A) Eliminates gear clutches
B) Eliminate the gear shaft lever
C) Reduces the number of automatic transmission components
D) Reduces shift shock and achieves more efficient transmission of engine torque
Ans: D
69. In a forced 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
70. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of
A) Section width to section height B) Section height to section width
C) Wheel diameter to section height D) Wheel diameter to section width
Ans: B
71. The advantage of the fuel injection system over the carburettor system is
A) Improved fuel efficiency B) Improved emission
C) Improved power output D) All of these
Ans: D
72. Which of the following indicates multi-grade oil ?
A) SAE30 B) API SF C) SAE20 W50 D) API50
Ans: C
73. The compression ratio in petrol engine is kept less than in Diesel engine because
A) It makes petrol engines lighter
B) Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C) Less compression ratio gives better performance
D) It is just customary to have less compression ratio in petrol engines
Ans: B
74. The service brakes employed in cars are generally operated
A) Mechanically B) Hydraulically C) Pneumatically D) None of these
Ans: B
75. The self ignition temperature of Diesel as compared to petrol is
A) Higher B) Lower
C) Same D) Depends on fuel quality
Ans: B
76. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
A) Supercharging B) Auto ignition C) Scavenging D) Detonation
Ans: A
77. The caster is called positive when the top of the king pin is inclined to the
A) Rear of the vehicle B) Front of the vehicle
C) Left of the vehicle D) Right of the vehicle
Ans: A
78. Why are pistons given a coating ?
A) To increase lubrication effect B) To conduct heat efficiently
C) To reduce weight D) To reduce possibility of scoring
Ans: D
79. The function of Positive Crankcase Ventilation (PCV) system is that it
A) Mixes fuel with air
B) Promotes combustion by creating a swirling movement in the air-fuel mixture
C) Returns blow by gases from the crankcase to the intake system
D) Feeds blow by gases to the exhaust manifold
Ans: C
80. The basic purpose of a Four Wheel Drive (4WD) system is that it
A) Delivers improved cornering on dry road surfaces
B) Eliminates the need of snow tyres, tyre chains, etc.
C) Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
D) Ensures that effective braking can be performed, even on slippery surfaces
Ans: C
81. The timing belt is attached to the camshaft pulley and
A) Timing belt drive pulley B) Distributor
C) Radiator fan pulley D) Alternator pulley
Ans: A
82. When the front wheels of a vehicle are locked during braking, then
A) Stopping distance becomes extremely long
B) Front tyres skid across the road surface and the vehicle spins around
C) Rear tyres skid across the road surface and the vehicle spins around
D) Driver loses control over the steering and the vehicle continues moving in its current direction
Ans: D
83. The best fuels for compression ignition engines are
A) Straight chain paraffin B) Aromatics
C) Branched chain paraffin D) Naphthalene
Ans: A
84. Damper is also known as
A) Shock absorber B) Torsion bar
C) Spring D) Radius rod
Ans: A
85. The effect of having excess camber is
A) Excessive steering alignment torque B) Hard steering
C) Too much traction D) Uneven tyre wear
Ans: D
86. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
A) 175 B) 65 C) 14 D) 82
Ans: B
87. In a hydraulic power steering system, the power steering pump is driven by a
A) Belt driven by camshaft B) Chain driven by crankshaft
C) Belt driven by drive-shaft D) Belt driven by crankshaft
Ans: D
88. The included angle is the sum of the
A) Camber and castor B) Castor and S.A.I.
C) Camber and S.A.I. D) Camber and toe in
Ans: C
89. Vulcanizing means
A) Heating rubber under pressure B) Spraying with special paint
C) Melting rubber while stirring it D) None of these
Ans: A
90. When turning a corner
A) The front wheels are toeing out
B) The front wheels are turning on different angles
C) The inside front wheels has a greater angle than the outside wheel
D) All of the above
Ans: D
91. When a gear box has four forward speeds and one reverse speed, it is said to be a
A) 3-speed gear box B) 4-speed gear box
C) 5-speed gear box D) 6-speed gear box
Ans: B
92. The basic purpose of providing caster angle on wheels is to
A) Prevent uneven tyre wear
B) Maintain directional control
C) Bring the road contact of the tyre under the point of load
D) Compensate for wear in the steering linkage
Ans: B
93. When the piston is at T.D.C. the volume above the piston in the combustion chamber is the
A) Clearance volume B) Cylinder volume C) Exhaust volume D) None of these
Ans: A
94. Incorrect Steering Axis Inclination (S.A.I.) causes
A) Tendency to assume toe-out orientation
B) Generation of a braking effect at tight corners
C) Poor recovery of the steering wheel after making a turn
D) The vehicle to pull to the side of lesser inclination
Ans: C
95. The correct way to rectify an imbalanced wheel is to
A) Adjust the tyre pressure
B) Rotate the tyres
C) Adjust the damper spring tension
D) Attach appropriate weights to the wheel at appropriate positions
Ans: D
96. The fuel that detonates easily, is
A) N-heptane B) Iso-octane C) Benzene D) Alcohol
Ans: A
97. The parking brake generally acts on
A) Front wheels B) Rear wheels C) Front and rear wheels D) Propeller shaft
Ans: B
98. The commonly used antifreeze solution in automobiles is
A) Carbon disulphide B) Ethylene glycol C) Ammonium chloride D) Freon-12
Ans: B
99. Which of the following oil is more viscous ?
A) SAE 30 B) SAE 40 C) SAE 70 D) SAE 80
Ans: D
100. The painting of automobiles is done to
A) Prevent rust from growing on the body
B) Improve its external appearance
C) Retain the characteristics of steel for long
D) All of these
Ans: D