MECHANICAL ENGINEERING- PAGE 7
Mechanical Engineering MCQs- Page 7
1. The margin given in basic size is :
(A) Tolerance (B) High limit (C) Limit (D) Actual limit
Ans: C
2. Scratches on the surface is known as :
(A) Hillness (B) Roughness (C) Hill and valleys (D) Weaviness
Ans: D
3. What is the main purpose of annealing ?
(A) To improve machinability (B) To improve magnetism
(C) To increase hardness (D) To increase toughness
Ans: A
4. The ability of metal withstand impact load is :
(A) Malleability (B) Toughness (C) Hardness (D) Ductility
Ans: B
5. Second cut file is type of :
(A) Section (B) Grade (C) Cut (D) Design
Ans: B
6. Cast iron cannot be forged because it has the property of :
(A) Softness (B) Stiffness (C) Toughness (D) Brittleness
Ans: D
7. The minimum distance between rivets in a rivet joint :
(A) 2d (B) 3d (C) 2.5d (D) 1.5d
Ans: B
8. Which rivet is most commonly used for structural work ?
(A) Pan head (B) Snap head
(C) Flat head (D) Counter sink head
Ans: A
9. This taper is used in bores of spindle noses Lathe and milling machine :
(A) Jarno taper (B) Metric taper
(C) Morse taper (D) Brown and Sharp taper
Ans: C
10. In which gear teeth are cut at an angle to the axis of rotation ?
(A) Spur gear (B) Helical gear
(C) Bevel gear (D) Worm and Shaft gear
Ans: B
11. Which pulley is fitted on the belt to increase the arc of contact ?
(A) Stepped pulley (B) Cone pulley (C) Jockey pulley (D) Driver pulley
Ans: C
12. Which tool is used to form the final shape of the rivet during riveting ?
(A) Rivet set (B) Dolly (C) Snap (D) Drift
Ans: C
13. A gear which changes the rotary motion into linear motion and vice-versa :
(A) Bevel gear (B) Hypoid gear (C) Worm gear (D) Rack and Pinion
Ans: D
14. Hook of cranes are made up of __________.
(A) High speed steel (B) High carbon steel
(C) Wrought iron (D) Pig iron
Ans: C
15. The product of Puddling furnace is __________.
(A) Steel (B) Pig iron (C) Cast iron (D) Wrought iron
Ans: D
16. Soldering iron is made of __________.
(A) Copper (B) Tungston (C) Mild steel (D) Lead
Ans: A
17. The distance a drill advances into the job in one complete revolution :
(A) RPM (B) Cutting speed (C) Machine speed (D) Feed
Ans: D
18. Which plug gauge has GO and NO GO end on the same side ?
(A) Taper plug gauge (B) Ring gauge
(C) Progressive plug gauge (D) Thread plug gauge
Ans: C
19. The process of joining slip gauges is known as __________.
(A) Adhesive (B) Cohesive (C) Wringing (D) Fitting
Ans: C
20. When temperature rises, what will happen to the viscosity of an oil ?
(A) Increase (B) Decrease
(C) Increase to Decrease (D) No change
Ans: B
(A) Tolerance (B) High limit (C) Limit (D) Actual limit
Ans: C
2. Scratches on the surface is known as :
(A) Hillness (B) Roughness (C) Hill and valleys (D) Weaviness
Ans: D
3. What is the main purpose of annealing ?
(A) To improve machinability (B) To improve magnetism
(C) To increase hardness (D) To increase toughness
Ans: A
4. The ability of metal withstand impact load is :
(A) Malleability (B) Toughness (C) Hardness (D) Ductility
Ans: B
5. Second cut file is type of :
(A) Section (B) Grade (C) Cut (D) Design
Ans: B
6. Cast iron cannot be forged because it has the property of :
(A) Softness (B) Stiffness (C) Toughness (D) Brittleness
Ans: D
7. The minimum distance between rivets in a rivet joint :
(A) 2d (B) 3d (C) 2.5d (D) 1.5d
Ans: B
8. Which rivet is most commonly used for structural work ?
(A) Pan head (B) Snap head
(C) Flat head (D) Counter sink head
Ans: A
9. This taper is used in bores of spindle noses Lathe and milling machine :
(A) Jarno taper (B) Metric taper
(C) Morse taper (D) Brown and Sharp taper
Ans: C
10. In which gear teeth are cut at an angle to the axis of rotation ?
(A) Spur gear (B) Helical gear
(C) Bevel gear (D) Worm and Shaft gear
Ans: B
11. Which pulley is fitted on the belt to increase the arc of contact ?
(A) Stepped pulley (B) Cone pulley (C) Jockey pulley (D) Driver pulley
Ans: C
12. Which tool is used to form the final shape of the rivet during riveting ?
(A) Rivet set (B) Dolly (C) Snap (D) Drift
Ans: C
13. A gear which changes the rotary motion into linear motion and vice-versa :
(A) Bevel gear (B) Hypoid gear (C) Worm gear (D) Rack and Pinion
Ans: D
14. Hook of cranes are made up of __________.
(A) High speed steel (B) High carbon steel
(C) Wrought iron (D) Pig iron
Ans: C
15. The product of Puddling furnace is __________.
(A) Steel (B) Pig iron (C) Cast iron (D) Wrought iron
Ans: D
16. Soldering iron is made of __________.
(A) Copper (B) Tungston (C) Mild steel (D) Lead
Ans: A
17. The distance a drill advances into the job in one complete revolution :
(A) RPM (B) Cutting speed (C) Machine speed (D) Feed
Ans: D
18. Which plug gauge has GO and NO GO end on the same side ?
(A) Taper plug gauge (B) Ring gauge
(C) Progressive plug gauge (D) Thread plug gauge
Ans: C
19. The process of joining slip gauges is known as __________.
(A) Adhesive (B) Cohesive (C) Wringing (D) Fitting
Ans: C
20. When temperature rises, what will happen to the viscosity of an oil ?
(A) Increase (B) Decrease
(C) Increase to Decrease (D) No change
Ans: B
21. Generally measuring tools are made of __________ metal.
(A) Mild steel (B) High carbon steel
(C) Cast iron (D) Aluminium
Ans: B
22. Size of Trysquare is determined by :
(A) Length of stock (B) Width of blade
(C) Thickness of stock (D) Length of blade
Ans: D
23. The __________ is used to cut parallel grooves.
(A) Diamond point chisel (B) Half round chisel
(C) Cross cut chisel (D) Flat chisel
Ans: C
24. __________ is used to correctly clean the hole.
(A) Drill (B) Tap
(C) Counter boring tool (D) Reamer
Ans: D
25. Least count of metric vernier micrometer is __________.
(A) 0.001 mm (B) 0.01 mm (C) 0.02 mm (D) 0.002 mm
Ans: A
26. Micron is equal to _________.
(A) 0.01 mm (B) 0.1 mm (C) 0.001 mm (D) 0.0001 mm
Ans: C
27. Gap between two matting surface is checked by :
(A) Radius gauge (B) Feeler gauge (C) Snap gauge (D) Centre gauge
Ans: B
28. To remove excessive brittleness of chisel __________ is done.
(A) Tempering (B) Hardening (C) Annealing (D) Normalizing
Ans: A
29. __________ is used to measure high temperature.
(A) Thermometer (B) Barometer (C) Pyrometer (D) Calorie meter
Ans: C
30. Tongs are generally made of __________.
(A) Cast iron (B) Mild steel
(C) High carbon steel (D) Brass
Ans: B
31. Best conductor of heat and electricity is __________.
(A) Copper (B) Nickel (C) Chromium (D) Aluminium
Ans: A
32. Smaller size of drill in number category is __________.
(A) 1 mm (B) 0.5 mm (C) 0.35 mm (D) 0.2 mm
Ans: C
33. __________ is used to put coal in forge and take out ash from forge.
(A) Tong (B) Drift (C) Shovel (D) Fuller
Ans: C
34. When close the pipe end is required fitting of __________.
(A) Union (B) Socket (C) Tee (D) Cap
Ans: D
35. The Rolling contact bearings are known as __________.
(A) Plain bearing (B) Anti friction bearing
(C) Plastic bearing (D) Thrust bearing
Ans: B
36. For shaft in parallel and rotating in same direction the belt drive used is _________.
(A) Diagonal (B) Cross (C) Open (D) None of these
Ans: C
37. A tab washer is used for __________.
(A) Self locking (B) Locking the nut
(C) Avoiding vibration (D) Fastening vibration work
Ans: B
38. Viscosity is an internal property of fluid it is a measure of its resistance to :
(A) Flow (B) Light (C) Sound (D) Current
Ans: A
39. A jig is a device used for __________.
(A) Holding the work (B) Guiding the tool
(C) Loosening the work (D) None of these
Ans: B
40. Which type of thread is used for Powerpress ?
(A) Square (B) Metric (C) B S W (D) Knuckle
Ans: A
41. Gun metal is an alloy of copper, __________.
(A) Lead and Zink (B) Tin and Zink
(C) Zink and Nickel (D) Lead and Nickel
Ans: B
42. Which one of the following is used to hold cylindrical rough casting for turning ?
(A) Four jaw chuck (B) Three jaw chuck
(C) Magnetic chuck (D) None of these
Ans: A
43. The most suitable pitch of hacksaw blade for cutting thin section tube is :
(A) 1 mm (B) 1.4 mm (C) 0.8 mm (D) 1.8 mm
Ans: C
44. Ratchet stop in micrometer helps to :
(A) Lock the spindle (B) Hold the work piece
(C) Adjust zero error (D) Control the pressure
Ans: D
45. The horizontal feed, cross feed, and screw cutting movement, in a lathe is controlled by :
(A) Apron (B) Head stock (C) Cross slide (D) Tail stock
Ans: A
46. Except __________ of the File is tempered.
(A) Heel (B) Shoulder (C) Tang (D) Point
Ans: C
47. Gauges are made of :
(A) Cast iron (B) Alloy steel (C) Mild steel (D) Cast steel
Ans: B
48. Which type of thread is used in lathe lead screw ?
(A) Square Thread (B) B S W Thread (C) B A Thread (D) Acme Thread
Ans: D
49. Which one of the coolant is used for Reaming Aluminium work piece ?
(A) Water (B) Lard oil (C) Kerosene (D) Air pressure
Ans: C
(A) Mild steel (B) High carbon steel
(C) Cast iron (D) Aluminium
Ans: B
22. Size of Trysquare is determined by :
(A) Length of stock (B) Width of blade
(C) Thickness of stock (D) Length of blade
Ans: D
23. The __________ is used to cut parallel grooves.
(A) Diamond point chisel (B) Half round chisel
(C) Cross cut chisel (D) Flat chisel
Ans: C
24. __________ is used to correctly clean the hole.
(A) Drill (B) Tap
(C) Counter boring tool (D) Reamer
Ans: D
25. Least count of metric vernier micrometer is __________.
(A) 0.001 mm (B) 0.01 mm (C) 0.02 mm (D) 0.002 mm
Ans: A
26. Micron is equal to _________.
(A) 0.01 mm (B) 0.1 mm (C) 0.001 mm (D) 0.0001 mm
Ans: C
27. Gap between two matting surface is checked by :
(A) Radius gauge (B) Feeler gauge (C) Snap gauge (D) Centre gauge
Ans: B
28. To remove excessive brittleness of chisel __________ is done.
(A) Tempering (B) Hardening (C) Annealing (D) Normalizing
Ans: A
29. __________ is used to measure high temperature.
(A) Thermometer (B) Barometer (C) Pyrometer (D) Calorie meter
Ans: C
30. Tongs are generally made of __________.
(A) Cast iron (B) Mild steel
(C) High carbon steel (D) Brass
Ans: B
31. Best conductor of heat and electricity is __________.
(A) Copper (B) Nickel (C) Chromium (D) Aluminium
Ans: A
32. Smaller size of drill in number category is __________.
(A) 1 mm (B) 0.5 mm (C) 0.35 mm (D) 0.2 mm
Ans: C
33. __________ is used to put coal in forge and take out ash from forge.
(A) Tong (B) Drift (C) Shovel (D) Fuller
Ans: C
34. When close the pipe end is required fitting of __________.
(A) Union (B) Socket (C) Tee (D) Cap
Ans: D
35. The Rolling contact bearings are known as __________.
(A) Plain bearing (B) Anti friction bearing
(C) Plastic bearing (D) Thrust bearing
Ans: B
36. For shaft in parallel and rotating in same direction the belt drive used is _________.
(A) Diagonal (B) Cross (C) Open (D) None of these
Ans: C
37. A tab washer is used for __________.
(A) Self locking (B) Locking the nut
(C) Avoiding vibration (D) Fastening vibration work
Ans: B
38. Viscosity is an internal property of fluid it is a measure of its resistance to :
(A) Flow (B) Light (C) Sound (D) Current
Ans: A
39. A jig is a device used for __________.
(A) Holding the work (B) Guiding the tool
(C) Loosening the work (D) None of these
Ans: B
40. Which type of thread is used for Powerpress ?
(A) Square (B) Metric (C) B S W (D) Knuckle
Ans: A
41. Gun metal is an alloy of copper, __________.
(A) Lead and Zink (B) Tin and Zink
(C) Zink and Nickel (D) Lead and Nickel
Ans: B
42. Which one of the following is used to hold cylindrical rough casting for turning ?
(A) Four jaw chuck (B) Three jaw chuck
(C) Magnetic chuck (D) None of these
Ans: A
43. The most suitable pitch of hacksaw blade for cutting thin section tube is :
(A) 1 mm (B) 1.4 mm (C) 0.8 mm (D) 1.8 mm
Ans: C
44. Ratchet stop in micrometer helps to :
(A) Lock the spindle (B) Hold the work piece
(C) Adjust zero error (D) Control the pressure
Ans: D
45. The horizontal feed, cross feed, and screw cutting movement, in a lathe is controlled by :
(A) Apron (B) Head stock (C) Cross slide (D) Tail stock
Ans: A
46. Except __________ of the File is tempered.
(A) Heel (B) Shoulder (C) Tang (D) Point
Ans: C
47. Gauges are made of :
(A) Cast iron (B) Alloy steel (C) Mild steel (D) Cast steel
Ans: B
48. Which type of thread is used in lathe lead screw ?
(A) Square Thread (B) B S W Thread (C) B A Thread (D) Acme Thread
Ans: D
49. Which one of the coolant is used for Reaming Aluminium work piece ?
(A) Water (B) Lard oil (C) Kerosene (D) Air pressure
Ans: C
50. The type of piston more contact with cylinder at thrust face is called :
(A) Slipper piston (B) Solid skirt piston
(C) Cam ground piston (D) Cavity piston
Ans: A
51. Waste gate is the part of __________.
(A) Water Pump (B) Exhaust System
(C) Turbo Charger (D) Positive Crankcase Ventilation
Ans: C
52. An exhaust gas recirculation system helps to reduce :
(A) CO2 emission (B) CO emission
(C) HC emission (D) NOx emission
Ans: D
53. The locking screw of vernier caliper is :
(A) Thumb screw (B) Grub screw (C) Set screw (D) Allen screw
Ans: A
54. Isolate the fire from the supply of oxygen by blanketing is called :
(A) Starving (B) Smothering (C) Cooling (D) Extinguishing
Ans: B
55. Engine temperature gauge will shows the temperature of :
(A) Engine coolant (B) Engine block
(C) Exhaust gas (D) Combustion temperature
Ans: A
56. __________ is capable of self-aligning components with threaded hole.
(A) Grub screw (B) Allen screw
(C) Thumb screw (D) Counter sink screw
Ans: D
57. Which type chisel is suitable for cutting keyway and grooves ?
(A) Diamond point chisel (B) Cape chisel
(C) Flat chisel (D) Half round chisel
Ans: B
58. The actual power developed in the engine cylinder is called :
(A) BHP (B) FHP (C) Engine power (D) IHP
Ans: D
59. How to test the short circuit of stator winding of alternator ?
(A) Connect the test lamp in series between each stator lead
(B) Connect the test lamp in series between stator laminator and each stator lead
(C) Connect the test lamp in parallel between stator laminator and stator lead
(D) Check the continuity between the stator leads
Ans: B
60. Which type valves are suitable in air compressors ?
(A) Reed valve (B) Rotary valve (C) Sleeve valve (D) Poppet valve
Ans: A
61. What is the necessity of locking lip in crankshaft bearings ?
(A) Better grip (B) Avoid rotation of bearing
(C) Better lubrication (D) Both (A) and (C)
Ans: B
62. What is the result of taper and ovality of engine bore ?
(A) Increase blow by (B) High oil consumption
(C) Piston slapping (D) All of these
Ans: D
63. Which type lubrication system has a separate oil tank besides oil sump ?
(A) Dry sump system (B) Pressure system
(C) Combined lubrication system (D) Bypass system
Ans: A
64. A diesel fuel feed pump is driven by __________.
(A) FIP camshaft (B) Engine camshaft
(C) Engine crankshaft (D) Either (A) or (B)
Ans: D
65. Which tool is used to mark large circles in sheet metal work ?
(A) Divider (B) Scriber (C) Trammel (D) Surface gauge
Ans: C
66. Which heat treatment process metal cools slowly in the furnace ?
(A) Normalizing (B) Tempering (C) Hardening (D) Annealing
Ans: D
67. In actual valve timing the inlet valve close :
(A) At BDC (B) Before BDC (C) After BDC (D) After TDC
Ans: C
68. Cast iron surface plate is designated by their length, breadth, __________.
(A) Grade and IS No. (B) Shape and IS No.
(C) Grade and material (D) Grade and shape
Ans: A
69. While compression stroke a little time taken combustion, after the injection of fuel, this period is called :
(A) Knock period (B) Uncontrolled combustion
(C) Controlled combustion (D) Ignition delay
Ans: D
70. A cold starting device of Diesel engine is called :
(A) Choke (B) Glow plug (C) Atomizer (D) Tickler
Ans: B
71. A special equipment Growler is used for checking :
(A) Short circuit of stator winding
(B) Commutator
(C) Short circuit of armature winding
(D) Solenoid winding
Ans: C
72. Which statement is true ?
(A) Octane rating means the ignition quality of diesel fuel
(B) Thermostat valve always open, the engine will over heat
(C) PCV valve is related to fuel system
(D) Turbo charger helps to increase volumetric efficiency
Ans: D
73. What is the necessity of flywheel ring gear ?
(A) Starting purpose (B) Power transmission
(C) Balancing flywheel (D) Identifying timing
Ans: A
74. The ability of metal to resist the effect of tensile force without rupturing :
(A) Elasticity (B) Plasticity (C) Ductility (D) Tenacity
Ans: D
75. The carbon content of cast iron is usually :
(A) 2 to 4.5% (B) More than 5% (C) 0.1 to 0.5% (D) Less than 0.1%
Ans: A
76. The rear end of crankshaft is fitted as :
(A) Timing gear (B) Vibration damper
(C) Clutch assembly (D) Fly
Ans: D
77. In CRDI engine which type fuel pump is used ?
(A) Jerk type pump (B) Rotary pump
(C) High pressure pump (D) Distributor VE pump
Ans: C
78. In an alternator electricity is generated at :
(A) Stator (B) Rotor (C) Regulator unit (D) Diode rectifier
Ans: A
79. Which type lubrication is used in 2 stroke engine ?
(A) Splash lubrication (B) Pressure lubrication
(C) Petroil lubrication (D) Dry sump lubrication
Ans: C
80. The word polarity is related to __________ welding.
(A) AC arc (B) DC arc
(C) Oxy-Acetylene gas (D) Resistance
Ans: B
81. The process of making leak proof joint after riveting is called :
(A) Brazing (B) Soldering
(C) Folding (D) Caulking and Fullering
Ans: D
82. A radiator pressure cap contains :
(A) Pressure and vacuum relief valve
(B) Pressure relief valve
(C) Vacuum relief valve
(D) Over flow valve
Ans: A
83. What is the cause of engine over heating ?
(A) Thermostat valve always open
(B) Run at high RPM
(C) Injector pressure is more
(D) Broken fan belt
Ans: D
84. What is calibration of FIP ?
(A) Correcting injection angle
(B) Correcting element angle
(C) Correcting quantity of fuel delivered
(D) All of these
Ans: C
85. For better wear protection Micrometer spindle is made of :
(A) Tungsten tip (B) Carbide tip (C) Carbon tip (D) Diamond tip
Ans: B
86. A worn out anvil tip of outside micrometer shows :
(A) Positive error (B) Zero error
(C) Negative correction (D) Negative error
Ans: D
87. The portion below the piston pin is called :
(A) Piston land (B) Piston head (C) Piston skirt (D) Piston pin boss
Ans: C
88. After turn off engine, the position of FIP element in :
(A) Maximum fuel delivery (B) Minimum fuel delivery
(C) Zero fuel delivery (D) None of these
Ans: A
89. The relation between Stroke length and Crankthrow is :
(A) Stroke=2×Crankthrow (B) Stroke=2+Crankthrow
(C) Stroke=Crankthrow/2 (D) Stroke=4×Crankthrow
Ans: A
90. The compression ratio of diesel engine is up to :
(A) 10 : 1 to 16 : 1 (B) 6 : 1 to 12 : 1
(C) 12 : 1 to 18 : 1 (D) 22 : 1 to 24 : 1
Ans: D
91. In a 2 stroke engine charge is first enter into :
(A) Cylinder block (B) Crankcase
(C) Combustion chamber (D) Transfer port
Ans: B
92. Engine camshaft is made of :
(A) Cast iron (B) Mild steel
(C) Cast alloy steel (D) Forged alloy steel
Ans: D
93. In a screw thread M18 stands :
(A) Metric thread, 18 mm length
(B) Metric thread, 18 cm length
(C) Metric thread, 18 mm Nominal Diameter
(D) Major Diameter 18 mm
Ans: C
94. The example of positive locking device is :
(A) Castle nut (B) Lock nut (C) Spring washer (D) Wing nut
Ans: A
95. The distance between TDC and BDC is called :
(A) Swept volume (B) Cycle (C) Cylinder bore (D) Stroke length
Ans: D
96. Which type camshaft drive mechanism no need of lubrication ?
(A) Chain drive (B) Belt drive (C) Gear drive (D) None of these
Ans: B
97. In a diesel Fuel system filter is situated :
(A) between Fuel tank and Feed pump
(B) between FIP and Injector
(C) between Feed pump and FIP
(D) inside of Fuel tank
Ans: C
98. Worn out main bearings cause :
(A) Increase oil pressure (B) Decrease oil pressure
(C) No change in oil pressure (D) Oil leakage
Ans: B
99. Connecting rod small end bearing is usually :
(A) Shell bearing (B) Thrust bearing
(C) Foot step bearing (D) Bush bearing
Ans: D
100. In inventory control, the economic order quantity is the
(a) Optimum lot size (b) Highest level of inventory (c) Capability of plant to produce (d) None of these
Ans: A
(A) Slipper piston (B) Solid skirt piston
(C) Cam ground piston (D) Cavity piston
Ans: A
51. Waste gate is the part of __________.
(A) Water Pump (B) Exhaust System
(C) Turbo Charger (D) Positive Crankcase Ventilation
Ans: C
52. An exhaust gas recirculation system helps to reduce :
(A) CO2 emission (B) CO emission
(C) HC emission (D) NOx emission
Ans: D
53. The locking screw of vernier caliper is :
(A) Thumb screw (B) Grub screw (C) Set screw (D) Allen screw
Ans: A
54. Isolate the fire from the supply of oxygen by blanketing is called :
(A) Starving (B) Smothering (C) Cooling (D) Extinguishing
Ans: B
55. Engine temperature gauge will shows the temperature of :
(A) Engine coolant (B) Engine block
(C) Exhaust gas (D) Combustion temperature
Ans: A
56. __________ is capable of self-aligning components with threaded hole.
(A) Grub screw (B) Allen screw
(C) Thumb screw (D) Counter sink screw
Ans: D
57. Which type chisel is suitable for cutting keyway and grooves ?
(A) Diamond point chisel (B) Cape chisel
(C) Flat chisel (D) Half round chisel
Ans: B
58. The actual power developed in the engine cylinder is called :
(A) BHP (B) FHP (C) Engine power (D) IHP
Ans: D
59. How to test the short circuit of stator winding of alternator ?
(A) Connect the test lamp in series between each stator lead
(B) Connect the test lamp in series between stator laminator and each stator lead
(C) Connect the test lamp in parallel between stator laminator and stator lead
(D) Check the continuity between the stator leads
Ans: B
60. Which type valves are suitable in air compressors ?
(A) Reed valve (B) Rotary valve (C) Sleeve valve (D) Poppet valve
Ans: A
61. What is the necessity of locking lip in crankshaft bearings ?
(A) Better grip (B) Avoid rotation of bearing
(C) Better lubrication (D) Both (A) and (C)
Ans: B
62. What is the result of taper and ovality of engine bore ?
(A) Increase blow by (B) High oil consumption
(C) Piston slapping (D) All of these
Ans: D
63. Which type lubrication system has a separate oil tank besides oil sump ?
(A) Dry sump system (B) Pressure system
(C) Combined lubrication system (D) Bypass system
Ans: A
64. A diesel fuel feed pump is driven by __________.
(A) FIP camshaft (B) Engine camshaft
(C) Engine crankshaft (D) Either (A) or (B)
Ans: D
65. Which tool is used to mark large circles in sheet metal work ?
(A) Divider (B) Scriber (C) Trammel (D) Surface gauge
Ans: C
66. Which heat treatment process metal cools slowly in the furnace ?
(A) Normalizing (B) Tempering (C) Hardening (D) Annealing
Ans: D
67. In actual valve timing the inlet valve close :
(A) At BDC (B) Before BDC (C) After BDC (D) After TDC
Ans: C
68. Cast iron surface plate is designated by their length, breadth, __________.
(A) Grade and IS No. (B) Shape and IS No.
(C) Grade and material (D) Grade and shape
Ans: A
69. While compression stroke a little time taken combustion, after the injection of fuel, this period is called :
(A) Knock period (B) Uncontrolled combustion
(C) Controlled combustion (D) Ignition delay
Ans: D
70. A cold starting device of Diesel engine is called :
(A) Choke (B) Glow plug (C) Atomizer (D) Tickler
Ans: B
71. A special equipment Growler is used for checking :
(A) Short circuit of stator winding
(B) Commutator
(C) Short circuit of armature winding
(D) Solenoid winding
Ans: C
72. Which statement is true ?
(A) Octane rating means the ignition quality of diesel fuel
(B) Thermostat valve always open, the engine will over heat
(C) PCV valve is related to fuel system
(D) Turbo charger helps to increase volumetric efficiency
Ans: D
73. What is the necessity of flywheel ring gear ?
(A) Starting purpose (B) Power transmission
(C) Balancing flywheel (D) Identifying timing
Ans: A
74. The ability of metal to resist the effect of tensile force without rupturing :
(A) Elasticity (B) Plasticity (C) Ductility (D) Tenacity
Ans: D
75. The carbon content of cast iron is usually :
(A) 2 to 4.5% (B) More than 5% (C) 0.1 to 0.5% (D) Less than 0.1%
Ans: A
76. The rear end of crankshaft is fitted as :
(A) Timing gear (B) Vibration damper
(C) Clutch assembly (D) Fly
Ans: D
77. In CRDI engine which type fuel pump is used ?
(A) Jerk type pump (B) Rotary pump
(C) High pressure pump (D) Distributor VE pump
Ans: C
78. In an alternator electricity is generated at :
(A) Stator (B) Rotor (C) Regulator unit (D) Diode rectifier
Ans: A
79. Which type lubrication is used in 2 stroke engine ?
(A) Splash lubrication (B) Pressure lubrication
(C) Petroil lubrication (D) Dry sump lubrication
Ans: C
80. The word polarity is related to __________ welding.
(A) AC arc (B) DC arc
(C) Oxy-Acetylene gas (D) Resistance
Ans: B
81. The process of making leak proof joint after riveting is called :
(A) Brazing (B) Soldering
(C) Folding (D) Caulking and Fullering
Ans: D
82. A radiator pressure cap contains :
(A) Pressure and vacuum relief valve
(B) Pressure relief valve
(C) Vacuum relief valve
(D) Over flow valve
Ans: A
83. What is the cause of engine over heating ?
(A) Thermostat valve always open
(B) Run at high RPM
(C) Injector pressure is more
(D) Broken fan belt
Ans: D
84. What is calibration of FIP ?
(A) Correcting injection angle
(B) Correcting element angle
(C) Correcting quantity of fuel delivered
(D) All of these
Ans: C
85. For better wear protection Micrometer spindle is made of :
(A) Tungsten tip (B) Carbide tip (C) Carbon tip (D) Diamond tip
Ans: B
86. A worn out anvil tip of outside micrometer shows :
(A) Positive error (B) Zero error
(C) Negative correction (D) Negative error
Ans: D
87. The portion below the piston pin is called :
(A) Piston land (B) Piston head (C) Piston skirt (D) Piston pin boss
Ans: C
88. After turn off engine, the position of FIP element in :
(A) Maximum fuel delivery (B) Minimum fuel delivery
(C) Zero fuel delivery (D) None of these
Ans: A
89. The relation between Stroke length and Crankthrow is :
(A) Stroke=2×Crankthrow (B) Stroke=2+Crankthrow
(C) Stroke=Crankthrow/2 (D) Stroke=4×Crankthrow
Ans: A
90. The compression ratio of diesel engine is up to :
(A) 10 : 1 to 16 : 1 (B) 6 : 1 to 12 : 1
(C) 12 : 1 to 18 : 1 (D) 22 : 1 to 24 : 1
Ans: D
91. In a 2 stroke engine charge is first enter into :
(A) Cylinder block (B) Crankcase
(C) Combustion chamber (D) Transfer port
Ans: B
92. Engine camshaft is made of :
(A) Cast iron (B) Mild steel
(C) Cast alloy steel (D) Forged alloy steel
Ans: D
93. In a screw thread M18 stands :
(A) Metric thread, 18 mm length
(B) Metric thread, 18 cm length
(C) Metric thread, 18 mm Nominal Diameter
(D) Major Diameter 18 mm
Ans: C
94. The example of positive locking device is :
(A) Castle nut (B) Lock nut (C) Spring washer (D) Wing nut
Ans: A
95. The distance between TDC and BDC is called :
(A) Swept volume (B) Cycle (C) Cylinder bore (D) Stroke length
Ans: D
96. Which type camshaft drive mechanism no need of lubrication ?
(A) Chain drive (B) Belt drive (C) Gear drive (D) None of these
Ans: B
97. In a diesel Fuel system filter is situated :
(A) between Fuel tank and Feed pump
(B) between FIP and Injector
(C) between Feed pump and FIP
(D) inside of Fuel tank
Ans: C
98. Worn out main bearings cause :
(A) Increase oil pressure (B) Decrease oil pressure
(C) No change in oil pressure (D) Oil leakage
Ans: B
99. Connecting rod small end bearing is usually :
(A) Shell bearing (B) Thrust bearing
(C) Foot step bearing (D) Bush bearing
Ans: D
100. In inventory control, the economic order quantity is the
(a) Optimum lot size (b) Highest level of inventory (c) Capability of plant to produce (d) None of these
Ans: A
· UPSC Exam Syllabus- Mechanical Engineering
· Mechanical Engineering
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