MECHANICAL ENGINEERING- PAGE 3
Mechanical Engineering MCQs- Page 3
1. If the plug gauge have Go and No Go same side then it is called __________ .
(A) Progressive plug gauge (B) Double ended plug gauge
(C) Taper ring plug gauge (D) Thread plug gauge
Ans: A
2. A steel which contains just 0.8% carbon then it is called __________ .
(A) Hypo eutectoid steel (B) Eutectoid steel
(C) Hyper eutectoid steel (D) Plain carbon steel
Ans: B
3. High carbon steel contain __________ % of carbon.
(A) 0.3 to 0.8 (B) 0.1 to 1.5 (C) 0.8 to 1.4 (D) 0.15 to 0.3
Ans: C
4. At the time of arc welding __________ is used to protect the body.
(A) Dankry (B) Coat (C) Glass (D) Apron
Ans: D
5. Which machine is used to convert the AC main supply into an AC welding supply ?
(A) AC welding transformer (B) DC welding transformer
(C) Rectifier (D) Motor generator set
Ans: A
6. Zinc coated iron is known as __________ .
(A) Black iron (B) Galvanized iron
(C) Stainless steel (D) Wrought iron
Ans: B
7. The most commonly used rivet head is __________ .
(A) Pan head (B) Counter sunk head
(C) Conical head (D) Snap head
Ans: D
8. __________ is the lower critical temperature for plain carbon steel.
(A) 723 deg C (B) 750 deg C (C) 900 deg C (D) 695 deg C
Ans: A
9. __________ are used to produce internal threads.
(A) Die (B) Chaser (C) Thread roller (D) Tap
Ans: D
10. __________ is a forming operation in a lathe.
(A) Turning (B) Facing (C) Knurling (D) Threading
Ans: C
11. What is the grade of angle plate used for general machine shop work ?
(A) Grade 1 (B) Grade 2 (C) Grade 3 (D) Grade 0
Ans: B
12. Density of steel is __________ .
(A) 7.85 gm/cm2
(B) 8.85 gm/cm2
(C) 7.75 gm/cm2
(D) 7.55 gm/cm2
Ans: A
13. The point angle of a chisel for chipping cast iron is __________ .
(A) 558 (B) 37.58 (C) 608 (D) 658
Ans: C
14. What is the correct tap drill size for tapping M10 ?
(A) 8.5 mm (B) 7.5 mm (C) 9 mm (D) 10 mm
Ans: A
15. The purpose of __________ is to restore the correct cutting action of the grinding wheel.
(A) Loading (B) Glazing (C) Dressing (D) Truing
Ans: C
16. __________ is the difference between the maximum limit of size and the minimum size of limit.
(A) Deviation (B) Size (C) Tolerance (D) Clearance
Ans: C
17. The No : 80 drill means __________ mm.
(A) 5.791 (B) 3.264 (C) 1.016 (D) 0.35
Ans: D
18. The abrasive used for honing of non ferrous metal is __________ .
(A) Diamond (B) Boron carbide
(C) Aluminium oxide (D) Silicon carbide
Ans: D
19. Tempering temperature of screw driver is __________ .
(A) 230 deg C (B) 280 deg C (C) 320 deg C (D) 250 deg C
Ans: C
20. The difference between maximum limit of size to its corresponding basic size of a component is __________ .
(A) Actual deviation (B) Tolerance
(C) Upper deviation (D) Clearance
Ans: C
(A) Progressive plug gauge (B) Double ended plug gauge
(C) Taper ring plug gauge (D) Thread plug gauge
Ans: A
2. A steel which contains just 0.8% carbon then it is called __________ .
(A) Hypo eutectoid steel (B) Eutectoid steel
(C) Hyper eutectoid steel (D) Plain carbon steel
Ans: B
3. High carbon steel contain __________ % of carbon.
(A) 0.3 to 0.8 (B) 0.1 to 1.5 (C) 0.8 to 1.4 (D) 0.15 to 0.3
Ans: C
4. At the time of arc welding __________ is used to protect the body.
(A) Dankry (B) Coat (C) Glass (D) Apron
Ans: D
5. Which machine is used to convert the AC main supply into an AC welding supply ?
(A) AC welding transformer (B) DC welding transformer
(C) Rectifier (D) Motor generator set
Ans: A
6. Zinc coated iron is known as __________ .
(A) Black iron (B) Galvanized iron
(C) Stainless steel (D) Wrought iron
Ans: B
7. The most commonly used rivet head is __________ .
(A) Pan head (B) Counter sunk head
(C) Conical head (D) Snap head
Ans: D
8. __________ is the lower critical temperature for plain carbon steel.
(A) 723 deg C (B) 750 deg C (C) 900 deg C (D) 695 deg C
Ans: A
9. __________ are used to produce internal threads.
(A) Die (B) Chaser (C) Thread roller (D) Tap
Ans: D
10. __________ is a forming operation in a lathe.
(A) Turning (B) Facing (C) Knurling (D) Threading
Ans: C
11. What is the grade of angle plate used for general machine shop work ?
(A) Grade 1 (B) Grade 2 (C) Grade 3 (D) Grade 0
Ans: B
12. Density of steel is __________ .
(A) 7.85 gm/cm2
(B) 8.85 gm/cm2
(C) 7.75 gm/cm2
(D) 7.55 gm/cm2
Ans: A
13. The point angle of a chisel for chipping cast iron is __________ .
(A) 558 (B) 37.58 (C) 608 (D) 658
Ans: C
14. What is the correct tap drill size for tapping M10 ?
(A) 8.5 mm (B) 7.5 mm (C) 9 mm (D) 10 mm
Ans: A
15. The purpose of __________ is to restore the correct cutting action of the grinding wheel.
(A) Loading (B) Glazing (C) Dressing (D) Truing
Ans: C
16. __________ is the difference between the maximum limit of size and the minimum size of limit.
(A) Deviation (B) Size (C) Tolerance (D) Clearance
Ans: C
17. The No : 80 drill means __________ mm.
(A) 5.791 (B) 3.264 (C) 1.016 (D) 0.35
Ans: D
18. The abrasive used for honing of non ferrous metal is __________ .
(A) Diamond (B) Boron carbide
(C) Aluminium oxide (D) Silicon carbide
Ans: D
19. Tempering temperature of screw driver is __________ .
(A) 230 deg C (B) 280 deg C (C) 320 deg C (D) 250 deg C
Ans: C
20. The difference between maximum limit of size to its corresponding basic size of a component is __________ .
(A) Actual deviation (B) Tolerance
(C) Upper deviation (D) Clearance
Ans: C
21. The teeth angle of a single cut file is :
(A) 51 degree (B) 71 degree (C) 60 degree (D) 61 degree
Ans: C
22. Which is not a purpose of annealing ?
(A) to relieve strain and strees (B) to add cutting ability
(C) to eliminate strain and harness (D) to soften steel
Ans: B
23. The file used for bringing the material closer to the finished size is :
(A) Rough file (B) Rasp cut file
(C) Dead smooth file (D) Second cut file
Ans: D
24. The ratio of pitch circle diameter to the number of teeth of a spur gear is called :
(A) circular pitch (B) addendum circle (C) land (D) module
Ans: D
25. The purpose of clapper box in shaping machine is :
(A) to lift the tool during return stroke
(B) to hold the tool rigidly
(C) for giving depth of cut
(D) none of these
Ans: A
26. A screw thread micrometer measures which portion of a screw thread ?
(A) major diameter of thread (B) depth of thread
(C) core diameter of thread (D) pitch diameter of thread
Ans: D
27. Device which holds, support, locates and guide the tool during cutting operation is :
(A) fixture (B) jig (C) stopper (D) none of these
Ans: B
28. Bearings made to take thrust from one direction are classifieds as :
(A) needle bearing (B) roller bearing
(C) tapered roller bearing (D) ball bearing
Ans: C
29. Which type of caliper used for locating centre of round jobs ?
(A) leg and point caliper (B) outside caliper
(C) spring joint caliper (D) inside caliper
Ans: A
30. The part which is not essential for thread cutting operation in a centre lathe is :
(A) lead screw (B) tailstock (C) change gear unit (D) halfnut
Ans: B
31. Point angle of general purpose twist drill is :
(A) 120 degree (B) 45 degree (C) 119 degree (D) 118 degree
Ans: D
32. Softest part of a hammer head is known as :
(A) cheek (B) face (C) pein (D) handle
Ans: A
33. Device used for holding larger diameter taper shank drill to a machine spindle is known as :
(A) drift (B) socket (C) chuck (D) sleeve
Ans: B
34. What is the use of a cross cut chisel ?
(A) cutting key ways and grooves
(B) corner squaring
(C) for separating metals after chain drilling
(D) none of these
Ans: A
(A) 51 degree (B) 71 degree (C) 60 degree (D) 61 degree
Ans: C
22. Which is not a purpose of annealing ?
(A) to relieve strain and strees (B) to add cutting ability
(C) to eliminate strain and harness (D) to soften steel
Ans: B
23. The file used for bringing the material closer to the finished size is :
(A) Rough file (B) Rasp cut file
(C) Dead smooth file (D) Second cut file
Ans: D
24. The ratio of pitch circle diameter to the number of teeth of a spur gear is called :
(A) circular pitch (B) addendum circle (C) land (D) module
Ans: D
25. The purpose of clapper box in shaping machine is :
(A) to lift the tool during return stroke
(B) to hold the tool rigidly
(C) for giving depth of cut
(D) none of these
Ans: A
26. A screw thread micrometer measures which portion of a screw thread ?
(A) major diameter of thread (B) depth of thread
(C) core diameter of thread (D) pitch diameter of thread
Ans: D
27. Device which holds, support, locates and guide the tool during cutting operation is :
(A) fixture (B) jig (C) stopper (D) none of these
Ans: B
28. Bearings made to take thrust from one direction are classifieds as :
(A) needle bearing (B) roller bearing
(C) tapered roller bearing (D) ball bearing
Ans: C
29. Which type of caliper used for locating centre of round jobs ?
(A) leg and point caliper (B) outside caliper
(C) spring joint caliper (D) inside caliper
Ans: A
30. The part which is not essential for thread cutting operation in a centre lathe is :
(A) lead screw (B) tailstock (C) change gear unit (D) halfnut
Ans: B
31. Point angle of general purpose twist drill is :
(A) 120 degree (B) 45 degree (C) 119 degree (D) 118 degree
Ans: D
32. Softest part of a hammer head is known as :
(A) cheek (B) face (C) pein (D) handle
Ans: A
33. Device used for holding larger diameter taper shank drill to a machine spindle is known as :
(A) drift (B) socket (C) chuck (D) sleeve
Ans: B
34. What is the use of a cross cut chisel ?
(A) cutting key ways and grooves
(B) corner squaring
(C) for separating metals after chain drilling
(D) none of these
Ans: A
35. What is the least count of a metric outside vernier micrometer ?
(A) 0.01 mm (B) 0.02 mm (C) 0.001 mm (D) 0.002 mm
Ans: C
36. Function of coolant in a metal cutting operation is :
(A) to prevent corrosion
(B) flush the chips from cutting edge
(C) to carry away heat generated during cutting operation
(D) all of these
Ans: D
37. The process of shaping of the grinding wheel is known as :
(A) dressing (B) truing (C) cleaning (D) loading
Ans: B
38. How much is the least count of a vernier bevel protractor ?
(A) 5 minutes (B) 5 seconds (C) 1 minute (D) 1 degree
Ans: A
39. Which process produces a flat seat for bolt head, washer or nut at the opening of a drilled hole ?
(A) chamfering (B) spot facing (C) counterboring (D) reaming
Ans: B
40. For a three start thread pitch is equal to :
(A) one third of the lead (B) three times the lead
(C) half of the lead (D) equal to lead
Ans: A
41. What is the included angle of a worm thread ?
(A) 60 degree (B) 55 degree (C) 45 degree (D) 29 degree
Ans: D
42. Plug tap is used for :
(A) making thread in a blind hole (B) for starting a thread
(C) for making left hand thread (D) for making fine thread
Ans: A
(A) 0.01 mm (B) 0.02 mm (C) 0.001 mm (D) 0.002 mm
Ans: C
36. Function of coolant in a metal cutting operation is :
(A) to prevent corrosion
(B) flush the chips from cutting edge
(C) to carry away heat generated during cutting operation
(D) all of these
Ans: D
37. The process of shaping of the grinding wheel is known as :
(A) dressing (B) truing (C) cleaning (D) loading
Ans: B
38. How much is the least count of a vernier bevel protractor ?
(A) 5 minutes (B) 5 seconds (C) 1 minute (D) 1 degree
Ans: A
39. Which process produces a flat seat for bolt head, washer or nut at the opening of a drilled hole ?
(A) chamfering (B) spot facing (C) counterboring (D) reaming
Ans: B
40. For a three start thread pitch is equal to :
(A) one third of the lead (B) three times the lead
(C) half of the lead (D) equal to lead
Ans: A
41. What is the included angle of a worm thread ?
(A) 60 degree (B) 55 degree (C) 45 degree (D) 29 degree
Ans: D
42. Plug tap is used for :
(A) making thread in a blind hole (B) for starting a thread
(C) for making left hand thread (D) for making fine thread
Ans: A
43. If a clearance fit is obtained in a hole basis system, the tolerance zone of the shaft must be :
(A) above the tolerance zone of the hole
(B) same as the tolerance zone of the hole
(C) below the tolerance zone of the hole
(D) above or equal to the tolerance zone of the hole
Ans: C
44. Carbon content of cast iron ranges from :
(A) 1 to 4 percentage (B) 0.8 to 1.5 percentage
(C) 2 to 4 percentage (D) 0.8 to 3 percentage
Ans: C
45. The jig generally used to drill a number of holes on a component from different angles is :
(A) sandwitch jig (B) box jig (C) table jig (D) post jig
Ans: B
46. Which is not an advantage of taper turning by attachment ?
(A) both internal and external tapers can be produced
(B) power feed can be given
(C) large angle tapers can be produced
(D) threads on taper portion can be produced
Ans: C
47. The process of dividing the periphery of a workpiece into any number of equal parts is known as :
(A) peripheral milling (B) parting off
(C) knurling (D) indexing
Ans: D
48. The slope between front of the cutting edge to a line perpendicular to the axis of the tool drawn downwards is :
(A) relief angle (B) rake angle (C) clearance angle (D) point angle
Ans: C
49. The bearing surface angle of a centre drill is :
(A) 60 degree (B) 120 degree (C) 45 degree (D) 30 degree
Ans: A
50. White metal is an alloy of :
(A) copper, tin and zinc (B) copper and zinc
(C) tin, copper and antimony (D) copper and tin
Ans: C
(A) above the tolerance zone of the hole
(B) same as the tolerance zone of the hole
(C) below the tolerance zone of the hole
(D) above or equal to the tolerance zone of the hole
Ans: C
44. Carbon content of cast iron ranges from :
(A) 1 to 4 percentage (B) 0.8 to 1.5 percentage
(C) 2 to 4 percentage (D) 0.8 to 3 percentage
Ans: C
45. The jig generally used to drill a number of holes on a component from different angles is :
(A) sandwitch jig (B) box jig (C) table jig (D) post jig
Ans: B
46. Which is not an advantage of taper turning by attachment ?
(A) both internal and external tapers can be produced
(B) power feed can be given
(C) large angle tapers can be produced
(D) threads on taper portion can be produced
Ans: C
47. The process of dividing the periphery of a workpiece into any number of equal parts is known as :
(A) peripheral milling (B) parting off
(C) knurling (D) indexing
Ans: D
48. The slope between front of the cutting edge to a line perpendicular to the axis of the tool drawn downwards is :
(A) relief angle (B) rake angle (C) clearance angle (D) point angle
Ans: C
49. The bearing surface angle of a centre drill is :
(A) 60 degree (B) 120 degree (C) 45 degree (D) 30 degree
Ans: A
50. White metal is an alloy of :
(A) copper, tin and zinc (B) copper and zinc
(C) tin, copper and antimony (D) copper and tin
Ans: C
51. When the angle between the shaft is 90 degree and two gears of a pair are equal, they are called :
(A) spur gear (B) spiral gear (C) helical gear (D) mitre gear
Ans: D
52. The method of removing metal by pushing or pulling an elongated cutting tool with a number of teeth in though hole or along a surface is known as :
(A) broaching (B) boring (C) lapping (D) hobbing
Ans: A
53. The grinding or abrading process mostly used for finishing round holes with the help of bonded abrasive stone is called :
(A) lapping (B) buffing (C) honing (D) hot dipping
Ans: C
54. The advantage of centerless grinder is :
(A) the workpiece being supported throughout its length
(B) no centre holes is required
(C) the size of workpiece is easily controlled
(D) all of these
Ans: D
55. The perpendicular distance measured from the machined surface to unmachined surface is called :
(A) feed (B) depth of cut (C) chamfer (D) taper
Ans: B
56. The device used for holding and rotating a hollow workpiece that has been previously drilled is :
(A) mandrel (B) collet (C) driving plate (D) centre
Ans: A
57. The operation of machining several surfaces of a workpiece simultaneously by feeding table against a number of cutters is known as :
(A) straddle milling (B) profile milling (C) saw milling (D) gang milling
Ans: D
58. Which of the heat treatment gives a scale free surface to the component ?
(A) flame hardening (B) nitriding
(C) induction hardening (D) tempering
Ans: C
(A) spur gear (B) spiral gear (C) helical gear (D) mitre gear
Ans: D
52. The method of removing metal by pushing or pulling an elongated cutting tool with a number of teeth in though hole or along a surface is known as :
(A) broaching (B) boring (C) lapping (D) hobbing
Ans: A
53. The grinding or abrading process mostly used for finishing round holes with the help of bonded abrasive stone is called :
(A) lapping (B) buffing (C) honing (D) hot dipping
Ans: C
54. The advantage of centerless grinder is :
(A) the workpiece being supported throughout its length
(B) no centre holes is required
(C) the size of workpiece is easily controlled
(D) all of these
Ans: D
55. The perpendicular distance measured from the machined surface to unmachined surface is called :
(A) feed (B) depth of cut (C) chamfer (D) taper
Ans: B
56. The device used for holding and rotating a hollow workpiece that has been previously drilled is :
(A) mandrel (B) collet (C) driving plate (D) centre
Ans: A
57. The operation of machining several surfaces of a workpiece simultaneously by feeding table against a number of cutters is known as :
(A) straddle milling (B) profile milling (C) saw milling (D) gang milling
Ans: D
58. Which of the heat treatment gives a scale free surface to the component ?
(A) flame hardening (B) nitriding
(C) induction hardening (D) tempering
Ans: C
59. Which is not an essential property of a good lubricant ?
(A) viscosity (B) adhesiveness (C) oiliness (D) flashpoint
Ans: B
60. Which is not a part of center lathe ?
(A) Carriage (B) Cross rail (C) Apron (D) Bed
Ans: B
61. Accuracy of inside micrometer is __________ .
(A) 0.01 mm (B) 0.01 cm (C) 0.001 mm (D) 0.02 mm
Ans: A
62. Example of non ferrous tool materials is __________ .
(A) Tungsten (B) High speed steel
(C) Ceramic (D) High carbon steel
Ans: C
63. The chemical symbol of Acetylene gas is __________ .
(A) C2H2
(B) H2SO
(C) H2F
(D) H2F2
Ans: A
64. __________ files is used in causes where a heavy reduction of materials is required.
(A) Smooth file (B) Second cut file (C) Rough file (D) Bastard file
Ans: D
65. The size of the bench vice is stated by __________ .
(A) Overall length (B) Length of jaw
(C) Width of jaw (D) Moving length of jaw
Ans: C
66. Try squares are specified by __________ .
(A) Length of stock (B) Length of blade (C) Width of stock (D) Width of blade
Ans: B
67. One micrometer is equal to __________ .
(A) 100 mm (B) 0.001 mm (C) 0.0001 mm (D) 0.01 mm
Ans: B
68. Steel rules are made of __________ .
(A) Stainless steel (B) High carbon steel
(C) High speed steel (D) All of these
Ans: A
(A) viscosity (B) adhesiveness (C) oiliness (D) flashpoint
Ans: B
60. Which is not a part of center lathe ?
(A) Carriage (B) Cross rail (C) Apron (D) Bed
Ans: B
61. Accuracy of inside micrometer is __________ .
(A) 0.01 mm (B) 0.01 cm (C) 0.001 mm (D) 0.02 mm
Ans: A
62. Example of non ferrous tool materials is __________ .
(A) Tungsten (B) High speed steel
(C) Ceramic (D) High carbon steel
Ans: C
63. The chemical symbol of Acetylene gas is __________ .
(A) C2H2
(B) H2SO
(C) H2F
(D) H2F2
Ans: A
64. __________ files is used in causes where a heavy reduction of materials is required.
(A) Smooth file (B) Second cut file (C) Rough file (D) Bastard file
Ans: D
65. The size of the bench vice is stated by __________ .
(A) Overall length (B) Length of jaw
(C) Width of jaw (D) Moving length of jaw
Ans: C
66. Try squares are specified by __________ .
(A) Length of stock (B) Length of blade (C) Width of stock (D) Width of blade
Ans: B
67. One micrometer is equal to __________ .
(A) 100 mm (B) 0.001 mm (C) 0.0001 mm (D) 0.01 mm
Ans: B
68. Steel rules are made of __________ .
(A) Stainless steel (B) High carbon steel
(C) High speed steel (D) All of these
Ans: A
69. Jenny caliper also called __________ .
(A) Outside caliper (B) Vernier Caliper
(C) Firm joint calipers (D) Hermaphrodite caliper
Ans: D
70. The angle of the point of centre punch is __________ .
(A) 608 (B) 308 (C) 458 (D) 908
Ans: D
71. The accuracy of bevel protractor is __________ .
(A) ±18 (B) ±0.58 (C) 5” (D) 5'
Ans: A
72. Standard length of hacksaw blade is __________ .
(A) 100 mm (B) 300 mm (C) 200 mm (D) 400 mm
Ans: B
73. For cutting high speed steel __________ mm pitch hacksaw blade is used.
(A) 1.8 mm (B) 0.8 mm (C) 1 mm (D) 1.4 mm
Ans: B
74. __________ chisel is used for squaring materials at the corner, joints.
(A) Web chisel (B) Diamond point chisel
(C) Cross cut chisel (D) Flat chisel
Ans: B
75. The weight of an engineer hammer used for marking purposes is __________ .
(A) 250 gram (B) 500 gram (C) 125 gram (D) 750 gram
Ans: A
76. Current range of 5 mm diameter electrode size is __________ .
(A) 40 - 60 A (B) 90 - 130 A (C) 130 - 270 A (D) 60 - 80 A
Ans: C
77. __________ property is a measure of metals ability to withstand scratching, wear, abrasion.
(A) Malleability (B) Hardness (C) Brittleness (D) Tenacity
Ans: B
78. The shape of woodruff key is __________ .
(A) Rectangular (B) Square (C) Round (D) Half round
Ans: D
(A) Outside caliper (B) Vernier Caliper
(C) Firm joint calipers (D) Hermaphrodite caliper
Ans: D
70. The angle of the point of centre punch is __________ .
(A) 608 (B) 308 (C) 458 (D) 908
Ans: D
71. The accuracy of bevel protractor is __________ .
(A) ±18 (B) ±0.58 (C) 5” (D) 5'
Ans: A
72. Standard length of hacksaw blade is __________ .
(A) 100 mm (B) 300 mm (C) 200 mm (D) 400 mm
Ans: B
73. For cutting high speed steel __________ mm pitch hacksaw blade is used.
(A) 1.8 mm (B) 0.8 mm (C) 1 mm (D) 1.4 mm
Ans: B
74. __________ chisel is used for squaring materials at the corner, joints.
(A) Web chisel (B) Diamond point chisel
(C) Cross cut chisel (D) Flat chisel
Ans: B
75. The weight of an engineer hammer used for marking purposes is __________ .
(A) 250 gram (B) 500 gram (C) 125 gram (D) 750 gram
Ans: A
76. Current range of 5 mm diameter electrode size is __________ .
(A) 40 - 60 A (B) 90 - 130 A (C) 130 - 270 A (D) 60 - 80 A
Ans: C
77. __________ property is a measure of metals ability to withstand scratching, wear, abrasion.
(A) Malleability (B) Hardness (C) Brittleness (D) Tenacity
Ans: B
78. The shape of woodruff key is __________ .
(A) Rectangular (B) Square (C) Round (D) Half round
Ans: D
79. The purpose of annealing is __________ .
(A) To add cutting ability
(B) To soften the steel
(C) To refine the structure of the steel
(D) To induce toughness
Ans: B
80. The amount of draft required does not depends up on
A) Moulding method B) Shape and size of the casting
C) Material of the pattern D) None of the above
Ans: D
81. Stainless steel is so called because of its
A) High strength B) Corrosion resistance
C) Brittleness D) High ductility
Ans: B
82. In white cast irons, carbon present as _________
A) Graphite flakes B) Graphite nodules
C) Carbon does not exist D) Cementite
Ans: D
83. Usual casting method for making dental crowns
A) Sand casting B) Investment casting
C) Continuous casting D) Die casting
Ans: B
84. Which one of the following saw is having a reinforcement strip (rib) on its back ?
A) Hand saw B) Tenon saw
C) Coping saw D) Feat saw
Ans: B
85. Which chisel should never be used with a mallet ?
A) Firmer chisel B) Gauge chisel
C) Mortise chisel D) Paring chisel
Ans: D
86. A two high rolling mill consists of two rollers which rotates
A) At the same speed and in the same direction
B) At the same speed but in opposite direction
C) At different speed and in the same direction
D) At different speed and in the opposite direction
Ans: B
87. The flux commonly used in brazing is
A) Zinc chloride B) Ammonium chloride
C) Borax D) Rosin plus alcohol
Ans: C
88. In arc welding, the temperature of heat produced by the electric arc is of the order of
A) 3000°C to 4000°C B) 4000°C to 5000°C
C) 5000°C to 6000°C D) 6000°C to 7000°C
Ans: D
89. The operation of cutting of a flat sheet to the desired shape is called
A) Blanking B) Shearing
C) Piercing D) Punching
Ans: A
90. Good surface finish and better dimensional accuracy can be achieved in
A) Hot working B) Cold working
C) Both A) and B) D) None of the above
Ans: B
91. Hot working process is the plastic deformation of metal which is carried out
A) At temperature below the recrystallisation temperature
B) At the melting temperature of the metal
C) At temperature above the recrystallisation temperature
D) None of the above
Ans: C
92. Principle of unit load state that
A) Materials should be moved in lots
B) One unit should be moved at a time
C) Both A) and B)
D) None of the above
Ans: A
93. Fork lift is used for
A) Lifting and lowering B) Vertical transportation
C) Both A) and B) D) None of the above
Ans: C
94. Gas molecules that absorb thermal infrared radiation and are present in large quantity
to change climate system are known as
A) Alpha radiations B) Beta radiations
C) Ozone gases D) Greenhouse gases
Ans: D
(A) To add cutting ability
(B) To soften the steel
(C) To refine the structure of the steel
(D) To induce toughness
Ans: B
80. The amount of draft required does not depends up on
A) Moulding method B) Shape and size of the casting
C) Material of the pattern D) None of the above
Ans: D
81. Stainless steel is so called because of its
A) High strength B) Corrosion resistance
C) Brittleness D) High ductility
Ans: B
82. In white cast irons, carbon present as _________
A) Graphite flakes B) Graphite nodules
C) Carbon does not exist D) Cementite
Ans: D
83. Usual casting method for making dental crowns
A) Sand casting B) Investment casting
C) Continuous casting D) Die casting
Ans: B
84. Which one of the following saw is having a reinforcement strip (rib) on its back ?
A) Hand saw B) Tenon saw
C) Coping saw D) Feat saw
Ans: B
85. Which chisel should never be used with a mallet ?
A) Firmer chisel B) Gauge chisel
C) Mortise chisel D) Paring chisel
Ans: D
86. A two high rolling mill consists of two rollers which rotates
A) At the same speed and in the same direction
B) At the same speed but in opposite direction
C) At different speed and in the same direction
D) At different speed and in the opposite direction
Ans: B
87. The flux commonly used in brazing is
A) Zinc chloride B) Ammonium chloride
C) Borax D) Rosin plus alcohol
Ans: C
88. In arc welding, the temperature of heat produced by the electric arc is of the order of
A) 3000°C to 4000°C B) 4000°C to 5000°C
C) 5000°C to 6000°C D) 6000°C to 7000°C
Ans: D
89. The operation of cutting of a flat sheet to the desired shape is called
A) Blanking B) Shearing
C) Piercing D) Punching
Ans: A
90. Good surface finish and better dimensional accuracy can be achieved in
A) Hot working B) Cold working
C) Both A) and B) D) None of the above
Ans: B
91. Hot working process is the plastic deformation of metal which is carried out
A) At temperature below the recrystallisation temperature
B) At the melting temperature of the metal
C) At temperature above the recrystallisation temperature
D) None of the above
Ans: C
92. Principle of unit load state that
A) Materials should be moved in lots
B) One unit should be moved at a time
C) Both A) and B)
D) None of the above
Ans: A
93. Fork lift is used for
A) Lifting and lowering B) Vertical transportation
C) Both A) and B) D) None of the above
Ans: C
94. Gas molecules that absorb thermal infrared radiation and are present in large quantity
to change climate system are known as
A) Alpha radiations B) Beta radiations
C) Ozone gases D) Greenhouse gases
Ans: D
95. The most efficient method of compressing air is to
A) Adiabatically B) Isothermally
C) Polytropically D) None of the above
Ans: B
96. What does the symbol ‘O’ imply in work study ?
A) Inspection
B) Transport
C) Operation
D) Delay
Ans: C
97. Axial flow pump is started with its delivery valve
A) Fully closed
B) Kept fully open
C) Kept 50% open
D) None of these
Ans: B
98. Multistage centrifugal pump casing, the flow of water leaving the impeller, is
A) Rectilinear flow
B) Radial flow
C) Free vortex motion
D) None of the above
Ans: C
99. Connecting rods are generally of the following form.
A) Forged round section steel
B) Cast steel triangular section
C) Forged square section
D) Forged I section steel
Ans: D
100. The molecules in a solid move
A) In a random manner
B) Back and forth like tiny pendulums
C) In circular motion
D) In a haphazard way
Ans: B
A) Adiabatically B) Isothermally
C) Polytropically D) None of the above
Ans: B
96. What does the symbol ‘O’ imply in work study ?
A) Inspection
B) Transport
C) Operation
D) Delay
Ans: C
97. Axial flow pump is started with its delivery valve
A) Fully closed
B) Kept fully open
C) Kept 50% open
D) None of these
Ans: B
98. Multistage centrifugal pump casing, the flow of water leaving the impeller, is
A) Rectilinear flow
B) Radial flow
C) Free vortex motion
D) None of the above
Ans: C
99. Connecting rods are generally of the following form.
A) Forged round section steel
B) Cast steel triangular section
C) Forged square section
D) Forged I section steel
Ans: D
100. The molecules in a solid move
A) In a random manner
B) Back and forth like tiny pendulums
C) In circular motion
D) In a haphazard way
Ans: B
· UPSC Exam Syllabus- Mechanical Engineering
· Mechanical Engineering
· Mechanical Engineering- Page 1
· Mechanical Engineering- Page 2
· Mechanical Engineering- Page 3
· Mechanical Engineering- Page 4
· Mechanical Engineering- Page 5
· Mechanical Engineering- Page 6
· Mechanical Engineering- Page 7
· Mechanical Engineering- Page 8
· Mechanical Engineering- Page 9
· Mechanical Engineering- Page 10
· Mechanical Engineering- Page 11
· Mechanical Engineering- Page 12
· Mechanical Engineering- Page 13
· Mechanical Engineering
· Mechanical Engineering- Page 1
· Mechanical Engineering- Page 2
· Mechanical Engineering- Page 3
· Mechanical Engineering- Page 4
· Mechanical Engineering- Page 5
· Mechanical Engineering- Page 6
· Mechanical Engineering- Page 7
· Mechanical Engineering- Page 8
· Mechanical Engineering- Page 9
· Mechanical Engineering- Page 10
· Mechanical Engineering- Page 11
· Mechanical Engineering- Page 12
· Mechanical Engineering- Page 13