BLACKSMITH
BLACKSMITH MCQs
1. Point angle of centre punch is :
(A) 30 deg (B) 45 deg (C) 55 deg (D) 90 deg
Ans: D
2. Name of the cutting tool fixed on an anvil :
(A) Hot set (B) Hardie (C) Cold set (D) Chisel
Ans: B
3. The minimum amount of carbon in gray cast iron is :
(A) 0.5% (B) 0.8% (C) 1.5% (D) 2.5%
Ans: D
4. Steel pipes are normally manufactured by :
(A) Extrusion (B) Cold working
(C) Forging (D) Electroforming
Ans: A
5. Drills are usually made of :
(A) Mild steel (B) High speed steel
(C) Alloy steel (D) High carbon steel
Ans: B
6. Chisel used for removing surplus metal in cotter ways and slots is called :
(A) Flat chisel (B) Half round chisel
(C) Cross-cut chisel (D) Side chisel
Ans: D
7. Bronze is an alloy of Copper and :
(A) Lead (B) Zinc (C) Tin (D) Nickel
Ans: C
8. Depth of hardness of steel is increased by addition of :
(A) Nickel (B) Chromium (C) Tungsten (D) Vanadium
Ans: B
9. The compression test is carried on :
(A) Ductile material (B) Brittle material
(C) Malleable material (D) Plastic material
Ans: B
10. In engineering drawing, visible outlines are represented by :
(A) Continuous thick (B) Continuous thin
(C) Dashed thin (D) Dashed thick
Ans: A
11. An allen bolt is :
(A) Self locking bolt (B) Provided with hexagonal depression in head
(C) Same as stud (D) Used in high speed components
Ans: B
12. Which of the following is not a forging operation ?
(A) Extrusion (B) Fullering (C) Swaging (D) Edging
Ans: A
13. Cupola used to produce :
(A) Pig iron (B) Wrought iron (C) Cast iron (D) Carbon free
Ans: C
14. The function of coke in a blast furnace is to :
(A) Production of heat (B) Act as a reducing agent
(C) Act as a spacer in bosh region (D) All of the above
Ans: D
15. The included angle in Acme thread is :
(A) 60 deg (B) 55 deg (C) 46 deg (D) 29 deg
Ans: D
16. An alloy of Nickel and Copper is called :
(A) Monel (B) Gun metal (C) Muntz metal (D) German silver
Ans: A
17. Which of the following contains the least percentage of carbon ?
(A) Pig iron (B) Wrought iron (C) Cast iron (D) Malleable iron
Ans: B
18. The unit of mass in SI units is :
(A) Kilogram (B) Gram (C) Tonne (D) Quintal
Ans: A
19. The distance between the centre of two consecutive rivets in the same row is called :
(A) Lead (B) Lap (C) Pitch (D) Clearance
Ans: C
20. Tensile test is used for :
(A) Ductile material (B) Hard material
(C) Brittle material (D) None of these
Ans: A
21. The property of a material which returns to its original position after removal of load is called :
(A) Plasticity (B) Elasticity (C) Ductility (D) Malleability
Ans: B
22. Pre-heating is essential for welding :
(A) Cast iron (B) High speed steel
(C) Mild steel (D) None of these
Ans: A
23. The process extensively used for making bolts and nuts is :
(A) Cold peening (B) Hot piercing (C) Extrusion (D) Cold heading
Ans: D
24. Forging temperature of plain carbon steel is :
(A) 700 deg C (B) 600 deg C (C) 900 deg C (D) 1300 deg C
Ans: D
25. The process which improves the machinability of steels, but lower the hardness and tensile strength is :
(A) Spheroidising (B) Normalizing
(C) Full annealing (D) Process annealing
Ans: A
26. The object of caulking in a riveted joint is to make the joint :
(A) Free from corrosion (B) Leak-proof
(C) Free from stresses (D) Stronger in tension
Ans: B
27. A small selected portion of the job can be hardened by :
(A) Flame and induction hardening (B) Pack hardening
(C) Cyaniding (D) Nitriding
Ans: A
28. Coining is the operation of :
(A) Cold forging (B) Hot forging (C) Cold extrusion (D) Piercing
Ans: A
29. Which of the following is a direct compression process ?
(A) Bending (B) Extrusion (C) Stretch forming (D) Forging
Ans: D
30. Percentage of Silver in German Silver :
(A) 5% (B) 10% (C) 25% (D) None of these
Ans: D
31. Chief source of Sulphur in the blast furnace charge is :
(A) Iron ore (B) Coke (C) Flux (D) Sinter
Ans: B
32. Mild steel belongs to the following category :
(A) Medium carbon steel (B) High carbon steel
(C) Low carbon steel (D) Alloy steel
Ans: C
33. Hardness of a material determines, the resistance of materials to :
(A) Scratching (B) Wear and indentation
(C) Machinability (D) All of the above
Ans: D
34. Upsetting is the process of :
(A) Bending (B) Forging (C) Extrusion (D) Rolling
Ans: B
35. Main constituents of blast furnace slag are :
(A) SiO2 , FeO , CaO (B) SiO2 , CaO, Al2O3
(C) CaO, MgO, SiO2 (D) SiO2, Al2O3 , MgO
Ans: B
36. Corrosion resistance of steel is increased by adding :
(A) Chromium and Nickel (B) Aluminium and Zinc
(C) Tungsten and Sulphur (D) All of the above
Ans: A
37. A steel containing 0.8% carbon is known as :
(A) Eutectoid steel (B) Hyper-eutectoid steel
(C) Hypo-eutectoid steel (D) None of these
Ans: A
38. Which of the following materials cannot be forged ?
(A) Medium carbon steel (B) Mild steel
(C) Wrought iron (D) Cast iron
Ans: D
39. Flatter is a tool used for :
(A) Striking (B) Punching
(C) Finishing the surface (D) Holding the job
Ans: C
40. Case hardening is the only method suitable for :
(A) High speed steel (B) Low carbon steel
(C) High alloy steel (D) High carbon steel
Ans: B
41. Increase in hardness of metals due to its cold working is termed as :
(A) Induction hardening (B) Age hardening
(C) Work hardening (D) Flame hardening
Ans: C
42. Heating the steel above upper critical temperature and then cooling in air is the process of :
(A) Annealing (B) Normalizing (C) Tempering (D) Hardening
Ans: B
43. Melting point of pure iron is :
(A) 1259 deg C (B) 1379 deg C (C) 1539 deg C (D) 1739 deg C
Ans: C
44. Tool steel should be first hardened and then :
(A) Tempered (B) Normalized (C) Annealed (D) Cooled
Ans: A
45. Cold chisels are made by the process of :
(A) Piercing (B) Drawing (C) Forging (D) Rolling
Ans: C
46. Material which is best suited for forge welding is :
(A) Cast iron (B) Stainless steel
(C) High speed steel (D) Wrought iron
Ans: D
47. Difference between upper and lower limit of a dimension is called :
(A) Nominal size (B) Basic size (C) Actual size (D) Tolerance
Ans: D
48. Tool used for necking down operations :
(A) Fuller (B) Flatter (C) Swage (D) Chisel
Ans: A
49. Hacksaw blade is specified by its :
(A) Material (B) Length (C) Width (D) Number of teeth
Ans: B
50. Melting point of Tin is :
(A) 116 deg C (B) 232 deg C (C) 685 deg C (D) 850 deg C
Ans: B
(A) 30 deg (B) 45 deg (C) 55 deg (D) 90 deg
Ans: D
2. Name of the cutting tool fixed on an anvil :
(A) Hot set (B) Hardie (C) Cold set (D) Chisel
Ans: B
3. The minimum amount of carbon in gray cast iron is :
(A) 0.5% (B) 0.8% (C) 1.5% (D) 2.5%
Ans: D
4. Steel pipes are normally manufactured by :
(A) Extrusion (B) Cold working
(C) Forging (D) Electroforming
Ans: A
5. Drills are usually made of :
(A) Mild steel (B) High speed steel
(C) Alloy steel (D) High carbon steel
Ans: B
6. Chisel used for removing surplus metal in cotter ways and slots is called :
(A) Flat chisel (B) Half round chisel
(C) Cross-cut chisel (D) Side chisel
Ans: D
7. Bronze is an alloy of Copper and :
(A) Lead (B) Zinc (C) Tin (D) Nickel
Ans: C
8. Depth of hardness of steel is increased by addition of :
(A) Nickel (B) Chromium (C) Tungsten (D) Vanadium
Ans: B
9. The compression test is carried on :
(A) Ductile material (B) Brittle material
(C) Malleable material (D) Plastic material
Ans: B
10. In engineering drawing, visible outlines are represented by :
(A) Continuous thick (B) Continuous thin
(C) Dashed thin (D) Dashed thick
Ans: A
11. An allen bolt is :
(A) Self locking bolt (B) Provided with hexagonal depression in head
(C) Same as stud (D) Used in high speed components
Ans: B
12. Which of the following is not a forging operation ?
(A) Extrusion (B) Fullering (C) Swaging (D) Edging
Ans: A
13. Cupola used to produce :
(A) Pig iron (B) Wrought iron (C) Cast iron (D) Carbon free
Ans: C
14. The function of coke in a blast furnace is to :
(A) Production of heat (B) Act as a reducing agent
(C) Act as a spacer in bosh region (D) All of the above
Ans: D
15. The included angle in Acme thread is :
(A) 60 deg (B) 55 deg (C) 46 deg (D) 29 deg
Ans: D
16. An alloy of Nickel and Copper is called :
(A) Monel (B) Gun metal (C) Muntz metal (D) German silver
Ans: A
17. Which of the following contains the least percentage of carbon ?
(A) Pig iron (B) Wrought iron (C) Cast iron (D) Malleable iron
Ans: B
18. The unit of mass in SI units is :
(A) Kilogram (B) Gram (C) Tonne (D) Quintal
Ans: A
19. The distance between the centre of two consecutive rivets in the same row is called :
(A) Lead (B) Lap (C) Pitch (D) Clearance
Ans: C
20. Tensile test is used for :
(A) Ductile material (B) Hard material
(C) Brittle material (D) None of these
Ans: A
21. The property of a material which returns to its original position after removal of load is called :
(A) Plasticity (B) Elasticity (C) Ductility (D) Malleability
Ans: B
22. Pre-heating is essential for welding :
(A) Cast iron (B) High speed steel
(C) Mild steel (D) None of these
Ans: A
23. The process extensively used for making bolts and nuts is :
(A) Cold peening (B) Hot piercing (C) Extrusion (D) Cold heading
Ans: D
24. Forging temperature of plain carbon steel is :
(A) 700 deg C (B) 600 deg C (C) 900 deg C (D) 1300 deg C
Ans: D
25. The process which improves the machinability of steels, but lower the hardness and tensile strength is :
(A) Spheroidising (B) Normalizing
(C) Full annealing (D) Process annealing
Ans: A
26. The object of caulking in a riveted joint is to make the joint :
(A) Free from corrosion (B) Leak-proof
(C) Free from stresses (D) Stronger in tension
Ans: B
27. A small selected portion of the job can be hardened by :
(A) Flame and induction hardening (B) Pack hardening
(C) Cyaniding (D) Nitriding
Ans: A
28. Coining is the operation of :
(A) Cold forging (B) Hot forging (C) Cold extrusion (D) Piercing
Ans: A
29. Which of the following is a direct compression process ?
(A) Bending (B) Extrusion (C) Stretch forming (D) Forging
Ans: D
30. Percentage of Silver in German Silver :
(A) 5% (B) 10% (C) 25% (D) None of these
Ans: D
31. Chief source of Sulphur in the blast furnace charge is :
(A) Iron ore (B) Coke (C) Flux (D) Sinter
Ans: B
32. Mild steel belongs to the following category :
(A) Medium carbon steel (B) High carbon steel
(C) Low carbon steel (D) Alloy steel
Ans: C
33. Hardness of a material determines, the resistance of materials to :
(A) Scratching (B) Wear and indentation
(C) Machinability (D) All of the above
Ans: D
34. Upsetting is the process of :
(A) Bending (B) Forging (C) Extrusion (D) Rolling
Ans: B
35. Main constituents of blast furnace slag are :
(A) SiO2 , FeO , CaO (B) SiO2 , CaO, Al2O3
(C) CaO, MgO, SiO2 (D) SiO2, Al2O3 , MgO
Ans: B
36. Corrosion resistance of steel is increased by adding :
(A) Chromium and Nickel (B) Aluminium and Zinc
(C) Tungsten and Sulphur (D) All of the above
Ans: A
37. A steel containing 0.8% carbon is known as :
(A) Eutectoid steel (B) Hyper-eutectoid steel
(C) Hypo-eutectoid steel (D) None of these
Ans: A
38. Which of the following materials cannot be forged ?
(A) Medium carbon steel (B) Mild steel
(C) Wrought iron (D) Cast iron
Ans: D
39. Flatter is a tool used for :
(A) Striking (B) Punching
(C) Finishing the surface (D) Holding the job
Ans: C
40. Case hardening is the only method suitable for :
(A) High speed steel (B) Low carbon steel
(C) High alloy steel (D) High carbon steel
Ans: B
41. Increase in hardness of metals due to its cold working is termed as :
(A) Induction hardening (B) Age hardening
(C) Work hardening (D) Flame hardening
Ans: C
42. Heating the steel above upper critical temperature and then cooling in air is the process of :
(A) Annealing (B) Normalizing (C) Tempering (D) Hardening
Ans: B
43. Melting point of pure iron is :
(A) 1259 deg C (B) 1379 deg C (C) 1539 deg C (D) 1739 deg C
Ans: C
44. Tool steel should be first hardened and then :
(A) Tempered (B) Normalized (C) Annealed (D) Cooled
Ans: A
45. Cold chisels are made by the process of :
(A) Piercing (B) Drawing (C) Forging (D) Rolling
Ans: C
46. Material which is best suited for forge welding is :
(A) Cast iron (B) Stainless steel
(C) High speed steel (D) Wrought iron
Ans: D
47. Difference between upper and lower limit of a dimension is called :
(A) Nominal size (B) Basic size (C) Actual size (D) Tolerance
Ans: D
48. Tool used for necking down operations :
(A) Fuller (B) Flatter (C) Swage (D) Chisel
Ans: A
49. Hacksaw blade is specified by its :
(A) Material (B) Length (C) Width (D) Number of teeth
Ans: B
50. Melting point of Tin is :
(A) 116 deg C (B) 232 deg C (C) 685 deg C (D) 850 deg C
Ans: B
51. Another name of odd-leg caliper is :
(A) Inside caliper (B) Outside caliper
(C) Spring caliper (D) Hermaphrodite caliper
Ans: d
52. The material generally used for aircraft components is :
(A) Mild steel (B) High speed steel
(C) Stainless steel (D) Aluminium
Ans: D
53. Which is an ore of Zinc ?
(A) Calamine (B) Galena (C) Azurite (D) Cerussite
Ans: A
54. Forging operations, the cross-sectional area of bar is increased due to its reduction in length :
(A) Swaging (B) Upsetting (C) Drawing (D) Edging
Ans: B
55. Low carbon steel can be hardened by :
(A) Heating and quenching in water (B) Heating and quenching in oil
(C) Carburising and cyaniding (D) None of these
Ans: C
56. Hot tear is a :
(A) Heat treatment process (B) Fabrication process
(C) Casting defect (D) None of the above
Ans: C
57. Acetylene gas is generated from :
(A) Calcium (B) Calcium carbide
(C) Carbon (D) Calcium carbonate
Ans: B
58. Gun metal is an alloy of :
(A) Nickel, Tin and Copper (B) Copper, Tin and Zinc
(C) Copper, Phosphorus and Nickel (D) Manganese, Phosphorus and Nickel
Ans: B
59. A feeler gauge is used for checking :
(A) Screw pitch (B) Radius
(C) Surface roughness (D) Thickness of clearance
Ans: D
60. Cross-section of chisel are generally :
(A) Square (B) Circular (C) Hexagonal (D) Octagonal
Ans: D
61. Which of the following gases are used in TIG welding ?
(A) Helium and Neon (B) Hydrogen and Oxygen
(C) Argon and Helium (D) Carbon dioxide and Hydrogen
Ans: C
62. Which of the part of an anvil is used for making hole on metal ?
(A) Face (B) Beak (C) Tail (D) Punch hole
Ans: D
63. Maximum hardenability of steel depends on its :
(A) Chemical composition (B) Carbon content
(C) Grain size (D) All of the above
Ans: B
64. Which of the following material has the highest hardness ?
(A) Cast iron (B) Steel (C) Silicon carbide (D) Copper
Ans: C
65. Given the following is not a heat treatment process :
(A) Parkerising (B) Cyaniding (C) Austempering (D) Martempering
Ans: A
66. The material for drawn into wire should have high :
(A) Stiffness (B) Toughness (C) Ductility (D) Hardness
Ans: C
67. Copper melts at :
(A) 812 deg C (B) 918 deg C (C) 1083 deg C (D) 1145 deg C
Ans: C
68. The cutting angle of chisel for cutting mild steel should be :
(A) 288 (B) 308 (C) 558 (D) 608
Ans: D
69. Case hardening cannot be done by :
(A) Electroplating (B) Cyaniding
(C) Induction hardening (D) Nitriding
Ans: A
70. Chisels used for cutting keyways is :
(A) Flat chisel (B) Round nose chisel
(C) Cape chisel (D) None of these
Ans: C
71. The instrument used to measure thickness of parts, internal and external diameter of shaft and depth of holes, is :
(A) Inside micrometer (B) Outside micrometer
(C) Depth gauge (D) Vernier caliper
Ans: D
72. Forging is accomplished in drop forging by dropping the :
(A) Hammer at high velocity
(B) Weight on hammer to produce the required impact
(C) Die with hammer at high velocity
(D) Work piece at high velocity
Ans: C
73. A cold chisel is made of :
(A) High carbon steel (B) Mild steel
(C) High speed steel (D) Cast iron
Ans: A
74. Hammer is made by :
(A) Cast iron (B) Wrought iron (C) Mild steel (D) High carbon steel
Ans: D
75. The material for construction of bearing is :
(A) Mild steel (B) Babbit metal (C) Pig iron (D) Steel
Ans: B
76. Wrought iron is :
(A) Hard (B) High in strength
(C) Highly resistant to corrosion (D) Least resistant to corrosion
Ans: C
77. Pure iron is the structure of :
(A) Ferrite (B) Pearlite (C) Austenite (D) Cementite
Ans: A
78. Ability of material absorbing large amount of energy before fracture is known as :
(A) Ductility (B) Toughness (C) Plasticity (D) Hardness
Ans: B
79. Young’s modulus may be defined as the ratio of :
(A) Linear stress to lateral strain (B) Lateral strain to linear strain
(C) Linear stress to linear strain (D) Shear stress to shear strain
Ans: C
80. The tool used for internal thread making :
(A) Tap (B) Dies (C) Punch (D) Drift
Ans: A
81. Mild steel is used for making :
(A) Die block (B) Hammer (C) Hacksaw blade (D) Channels
Ans: D
82. Machining properties of steel is improved by adding :
(A) Sulphur, Lead and Phosphorus (B) Silicon, Aluminium and Titanium
(C) Vanadium, Aluminium (D) Chromium, Nickel
Ans: A
83. Steel possess the maximum ductility by :
(A) Quenching (B) Annealing (C) Carburising (D) Hardening
Ans: B
84. The railway carriage couplings have :
(A) Square thread (B) Acme thread (C) Knuckle thread (D) Buttress thread
Ans: D
85. The test specimen is measured in the creep test :
(A) Deformation in volume (B) Deformation in length
(C) Deformation in width (D) None of these
Ans: B
86. Blast furnace produces :
(A) Wrought iron (B) Cast iron (C) Pig iron (D) Steel
Ans: C
87. The process in which carbon and nitrogen both are absorbed by the metal surface to get hardened is :
(A) Carburising (B) Cyaniding
(C) Flame hardening (D) Induction hardening
Ans: B
88. Age hardening is connected with the :
(A) Gun metal (B) Stainless steel (C) Duralumin (D) Babbit metal
Ans: C
89. Swage block is made of :
(A) High speed steel (B) Tool steel
(C) High carbon steel (D) Cast iron
Ans: D
90. The usual value of the helix angle of drill is :
(A) 10 deg (B) 20 deg (C) 30 deg (D) 45 deg
Ans: C
91. In high carbon steel, carbon contain :
(A) Below 0.25% (B) 0.25 to 0.8% (C) 0.8 to 1.5% (D) 1.5 to 2.5%
Ans: C
92. Which has the highest percentage of iron ?
(A) Magnetite (B) Hematite (C) Limonite (D) Iron pyrite
Ans: A
93. Hot working of metal does not :
(A) Eliminate porosity (B) Achieve close tolerance
(C) Improve mechanical properties (D) Refine grain structure
Ans: B
94. An alloy of solder contains :
(A) Tin and Copper (B) Tin and Lead
(C) Lead and Copper (D) None of these
Ans: B
95. Lip angle of twist drill for mild steel should be :
(A) 108 degree (B) 1188 degree (C) 128 degree (D) 126 degree
Ans: B
96. Forging shop tool used for mainly squaring, sizing, heading, bending and forming operations is called :
(A) Flatter (B) Fuller (C) Swage (D) Swage block
Ans: D
97. Galvanizing is generally done on :
(A) Cast iron (B) Stainless steel
(C) Low carbon steel (D) Non-ferrous metal
Ans: C
98. Tool used for finishing corners in shouldered work :
(A) Chisel (B) Swage (C) Set hammer (D) Drift
Ans: C
99. Which of the following is a permanent fastening ?
(A) Rivets (B) Bolts (C) Screw (D) Keys
Ans: A
100. Flux is used for brazing :
(A) Ammonium chloride (B) Zinc chloride
(C) Rosin (D) Borax
Ans: D
(A) Inside caliper (B) Outside caliper
(C) Spring caliper (D) Hermaphrodite caliper
Ans: d
52. The material generally used for aircraft components is :
(A) Mild steel (B) High speed steel
(C) Stainless steel (D) Aluminium
Ans: D
53. Which is an ore of Zinc ?
(A) Calamine (B) Galena (C) Azurite (D) Cerussite
Ans: A
54. Forging operations, the cross-sectional area of bar is increased due to its reduction in length :
(A) Swaging (B) Upsetting (C) Drawing (D) Edging
Ans: B
55. Low carbon steel can be hardened by :
(A) Heating and quenching in water (B) Heating and quenching in oil
(C) Carburising and cyaniding (D) None of these
Ans: C
56. Hot tear is a :
(A) Heat treatment process (B) Fabrication process
(C) Casting defect (D) None of the above
Ans: C
57. Acetylene gas is generated from :
(A) Calcium (B) Calcium carbide
(C) Carbon (D) Calcium carbonate
Ans: B
58. Gun metal is an alloy of :
(A) Nickel, Tin and Copper (B) Copper, Tin and Zinc
(C) Copper, Phosphorus and Nickel (D) Manganese, Phosphorus and Nickel
Ans: B
59. A feeler gauge is used for checking :
(A) Screw pitch (B) Radius
(C) Surface roughness (D) Thickness of clearance
Ans: D
60. Cross-section of chisel are generally :
(A) Square (B) Circular (C) Hexagonal (D) Octagonal
Ans: D
61. Which of the following gases are used in TIG welding ?
(A) Helium and Neon (B) Hydrogen and Oxygen
(C) Argon and Helium (D) Carbon dioxide and Hydrogen
Ans: C
62. Which of the part of an anvil is used for making hole on metal ?
(A) Face (B) Beak (C) Tail (D) Punch hole
Ans: D
63. Maximum hardenability of steel depends on its :
(A) Chemical composition (B) Carbon content
(C) Grain size (D) All of the above
Ans: B
64. Which of the following material has the highest hardness ?
(A) Cast iron (B) Steel (C) Silicon carbide (D) Copper
Ans: C
65. Given the following is not a heat treatment process :
(A) Parkerising (B) Cyaniding (C) Austempering (D) Martempering
Ans: A
66. The material for drawn into wire should have high :
(A) Stiffness (B) Toughness (C) Ductility (D) Hardness
Ans: C
67. Copper melts at :
(A) 812 deg C (B) 918 deg C (C) 1083 deg C (D) 1145 deg C
Ans: C
68. The cutting angle of chisel for cutting mild steel should be :
(A) 288 (B) 308 (C) 558 (D) 608
Ans: D
69. Case hardening cannot be done by :
(A) Electroplating (B) Cyaniding
(C) Induction hardening (D) Nitriding
Ans: A
70. Chisels used for cutting keyways is :
(A) Flat chisel (B) Round nose chisel
(C) Cape chisel (D) None of these
Ans: C
71. The instrument used to measure thickness of parts, internal and external diameter of shaft and depth of holes, is :
(A) Inside micrometer (B) Outside micrometer
(C) Depth gauge (D) Vernier caliper
Ans: D
72. Forging is accomplished in drop forging by dropping the :
(A) Hammer at high velocity
(B) Weight on hammer to produce the required impact
(C) Die with hammer at high velocity
(D) Work piece at high velocity
Ans: C
73. A cold chisel is made of :
(A) High carbon steel (B) Mild steel
(C) High speed steel (D) Cast iron
Ans: A
74. Hammer is made by :
(A) Cast iron (B) Wrought iron (C) Mild steel (D) High carbon steel
Ans: D
75. The material for construction of bearing is :
(A) Mild steel (B) Babbit metal (C) Pig iron (D) Steel
Ans: B
76. Wrought iron is :
(A) Hard (B) High in strength
(C) Highly resistant to corrosion (D) Least resistant to corrosion
Ans: C
77. Pure iron is the structure of :
(A) Ferrite (B) Pearlite (C) Austenite (D) Cementite
Ans: A
78. Ability of material absorbing large amount of energy before fracture is known as :
(A) Ductility (B) Toughness (C) Plasticity (D) Hardness
Ans: B
79. Young’s modulus may be defined as the ratio of :
(A) Linear stress to lateral strain (B) Lateral strain to linear strain
(C) Linear stress to linear strain (D) Shear stress to shear strain
Ans: C
80. The tool used for internal thread making :
(A) Tap (B) Dies (C) Punch (D) Drift
Ans: A
81. Mild steel is used for making :
(A) Die block (B) Hammer (C) Hacksaw blade (D) Channels
Ans: D
82. Machining properties of steel is improved by adding :
(A) Sulphur, Lead and Phosphorus (B) Silicon, Aluminium and Titanium
(C) Vanadium, Aluminium (D) Chromium, Nickel
Ans: A
83. Steel possess the maximum ductility by :
(A) Quenching (B) Annealing (C) Carburising (D) Hardening
Ans: B
84. The railway carriage couplings have :
(A) Square thread (B) Acme thread (C) Knuckle thread (D) Buttress thread
Ans: D
85. The test specimen is measured in the creep test :
(A) Deformation in volume (B) Deformation in length
(C) Deformation in width (D) None of these
Ans: B
86. Blast furnace produces :
(A) Wrought iron (B) Cast iron (C) Pig iron (D) Steel
Ans: C
87. The process in which carbon and nitrogen both are absorbed by the metal surface to get hardened is :
(A) Carburising (B) Cyaniding
(C) Flame hardening (D) Induction hardening
Ans: B
88. Age hardening is connected with the :
(A) Gun metal (B) Stainless steel (C) Duralumin (D) Babbit metal
Ans: C
89. Swage block is made of :
(A) High speed steel (B) Tool steel
(C) High carbon steel (D) Cast iron
Ans: D
90. The usual value of the helix angle of drill is :
(A) 10 deg (B) 20 deg (C) 30 deg (D) 45 deg
Ans: C
91. In high carbon steel, carbon contain :
(A) Below 0.25% (B) 0.25 to 0.8% (C) 0.8 to 1.5% (D) 1.5 to 2.5%
Ans: C
92. Which has the highest percentage of iron ?
(A) Magnetite (B) Hematite (C) Limonite (D) Iron pyrite
Ans: A
93. Hot working of metal does not :
(A) Eliminate porosity (B) Achieve close tolerance
(C) Improve mechanical properties (D) Refine grain structure
Ans: B
94. An alloy of solder contains :
(A) Tin and Copper (B) Tin and Lead
(C) Lead and Copper (D) None of these
Ans: B
95. Lip angle of twist drill for mild steel should be :
(A) 108 degree (B) 1188 degree (C) 128 degree (D) 126 degree
Ans: B
96. Forging shop tool used for mainly squaring, sizing, heading, bending and forming operations is called :
(A) Flatter (B) Fuller (C) Swage (D) Swage block
Ans: D
97. Galvanizing is generally done on :
(A) Cast iron (B) Stainless steel
(C) Low carbon steel (D) Non-ferrous metal
Ans: C
98. Tool used for finishing corners in shouldered work :
(A) Chisel (B) Swage (C) Set hammer (D) Drift
Ans: C
99. Which of the following is a permanent fastening ?
(A) Rivets (B) Bolts (C) Screw (D) Keys
Ans: A
100. Flux is used for brazing :
(A) Ammonium chloride (B) Zinc chloride
(C) Rosin (D) Borax
Ans: D
SUBSCRIPTION
- Mechanical Engineering - 10 MCQs
- Mechanical Engineering- Page 1 - 100 MCQs
- Mechanical Engineering- Page 2 - 100 MCQs
- Mechanical Engineering- Page 3 - 100 MCQs
- Mechanical Engineering- Page 4 - 100 MCQs
- Mechanical Engineering- Page 5 - 100 MCQs
- Mechanical Engineering- Page 6 - 100 MCQs
- Mechanical Engineering- Page 7 - 100 MCQs
- Mechanical Engineering- Page 8 - 100 MCQs
- Mechanical Engineering- Page 9 - 100 MCQs
- Mechanical Engineering- Page 10 - 100 MCQs
- Mechanical Engineering- Page 11 - 100 MCQs
- Mechanical Engineering- Page 12 - 100 MCQs
- Mechanical Engineering- Page 13 - 100 MCQs
- Mechanical Engineering- Page 14 - 100 MCQs
- Mechanical Engineering- Page 15 - 100 MCQs
- Mechanical Engineering- Page 16 - 100 MCQs
- Mechanical Engineering- Page 17 - 100 MCQs
- Mechanical Engineering- Page 18 - 100 MCQs
- Mechanical Engineering- Page 19 - 100 MCQs
- Mechanical Engineering- Page 20 - 100 MCQs
- Mechanical Engineering- Page 21
- Mechanical Engineering- Tool and Die Maker
- Mechanical Engineering- Pump Operation
- Mechanical Engineering- Instrument Mechanic- 99 MCQs