1. Which of the following is usually made of dead mild steel?
Correct : A. Flanges
2. The fastest cooling rate is achieved when steel is quenched in
Correct : A. Brine
3. An operation on steel aimed at softening the steel to improve machinability is known as
Correct : A. Annealing
4. Which of the following material can bear sudden and excessive shocks better?
Correct : C. Wrought iron
5. The process for steel making used at TISCO, Jamshedpur is
Correct : A. Duplex process
6. In Brinell hardness testing the minimum thickness of the specimen should be
Correct : A. More than 10 times the depth of impression
7. Vicker's hardness number of diamond could be of the order of
Correct : A. 8000
8. Carbon percentage in cutlery stainless steel is
Correct : E. 0.25 to 0.30 percent
9. The crystal structure of gamma iron is
Correct : E. FCC
10. High carbon steels intended to be quenched in water should have manganese percentage less than
Correct : B. 0.5 percent
11. A fine grained steel will have the number of grains per square centimeter as
Correct : D. 3 to 16
12. Uniformity of zinc coating on pipes is tested by
Correct : D. Dipping the sample for 1 minute in neutral copper sulphate solution
13. Which of the following materials are usually most ductile?
Correct : B. Face centred cubic lattice
14. In grey cast iron, free graphite is in the form of
Correct : E. Flakes
15. Volume of air required to melt one ton of cast iron in a cupola at N.T.P. is roughly
Correct : D. 100 cubic metres of air
16. The property of a metal when the recovery after unloading is complete but not instantaneous is
Correct : D. Anelasticity
17. Standard electrical resistance are made of
Correct : E. Constantan
18. A chisel for cutting steel plates is usually
Correct : A. Hardened and tempered
19. Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that
Correct : B. Steel has been burned
20. Which of the following material is viscoelastic in properties?
Correct : B. Rubber
21. Brinell hardness of nitrided surface may be of the order of
Correct : A. More than 600
22. If a medium carbon hardened steel shows pearlite structure it may be concluded that
Correct : E. Steel has been slowly cooled in furnace
23. Alpha brass is a (an)
Correct : C. Substitutional solid solution
24. Which of the following is a non-destructive test?
Correct : D. X-ray test
25. For each ton of pig iron produced in blast furnace, the quantity of coke required would be roughly
Correct : C. 1.4 ton
26. Warping of articles during heat treatment may be due to
Correct : A. internal stresses in the article before heating
27. In eddy current heating of steel, if the depth of heating is to be increased
Correct : C. Frequency must be low
28. The maximum percentage of carbon in ferrite is
Correct : B. 0.03%
29. The percentage of carbon in cold rolled steel sheets is around
Correct : D. 0.10%
30. In a specimen of hardened steel, hard and soft spots indicate
Correct : D. Uneven heating
31. A steel piece after hardening is heated to 300?C and then cooled in oil. The property imparted to the steel piece will be
Correct : D. Toughness
32. Killed' steel is
Correct : C. That steel which is deoxidised in the ladle with silicon and aluminium
33. Which of the following metal has the lowest specific gravity?
Correct : E. Magnesium
34. The crystal structure of most of the common metals is
Correct : B. Cubic
35. Iron ore which is grey to black in colour and is hard and magnetic, is known as
Correct : E. Magnetite
36. The slowest cooling rate is achieved when steel is quenched in
Correct : B. Air
37. Which of the following material does not have body centred cubic structure?
Correct : C. Zirconium
38. The crystal structure of brass is
Correct : C. FCC
39. Which of the following material is used for thermocouple junction?
Correct : A. Magnanin
40. If a sample of steel shown excessive hardness after tempering the probable cause could be
Correct : A. Insufficient holding time during tempering
41. Which of the following is usually not a constituent of paints?
Correct : A. Career
42. Magnetism is non-linearly related to the applied field in case of
Correct : C. Ferromagnetic field
43. Above the curie temperature, a magnetic material becomes
Correct : B. Paramagnetic
44. Which of the follwing is usually made of mild steel?
Correct : D. Channels
45. Bell metal is an alloy of
Correct : D. Copper and tin
46. Which of the following material has body centred cubic structure?
Correct : E. Molybdenum
47. The measurement junction of a thermocouple is taken from an environment of 300?C to 600?C. If time constant of the thermocouple is 1 second, temperature indicated by it, in ?C, after 1 second would be about
Correct : C. 497
48. Capacity of a cupola is expressed in terms of
Correct : C. Tons of castings it can produce in one charge
49. If an article develops insufficient hardening after quenching, the defect can be corrected by
Correct : B. normalising or annealing followed by hardening
50. Cast iron pipes are manufactured by
Correct : A. Centrifugal casting method
51. Crucible for melting of metals are made of
Correct : C. Graphite
52. In anti-ferromagnetic materials the spin moments associated with two sets of atoms are aligned
Correct : A. Anti-parallel to each other
53. Ultimate tensile strength is least in case of mild steel and is of the order of
Correct : E. 35 - 45 kg/mm2
54. Which of the following is not true for cementite?
Correct : A. It has low melting point
55. Which of the following furnace is used for steel only?
Correct : D. Open hearth furnace
56. The correct order of cooling media for decreasing cooling rate is
Correct : A. Water, oil, fused alst, air
57. Quenching cracks during heat treatment can be minimised
Correct : D. Any of the above
58. In high frequency heating of steel, the heat is generated primarily due to
Correct : E. Eddy currents
59. During burning of grain boundaries
Correct : D. All of the above
60. For nitriding, the nitrogen is provided by
Correct : D. Ammonia
61. Which of the following is closest to the purest form of iron
Correct : E. Wrought iron
62. Eddy currents
Correct : A. Increase with square of frequency
63. Which of the following is fluxing material for cupola?
Correct : D. Any of the above
64. In which of the following cases creep is an important consideration?
Correct : C. Gas turbine blades
65. Percentage of carbon in mild steel is
Correct : C. 0.10 to 0.25
66. The crystal structure of gamma iron is
Correct : C. FCC
67. Constantan is an alloy containing
Correct : A. Copper and nickel
68. Which of the following constituent will increase the hardness of steel?
Correct : A. Martensite
69. The depth of hardness in steel can be increased by the addition of
Correct : B. Chormium
70. The coordination number of NaCl is
Correct : E. 6
71. Babbit metal is an alloy of
Correct : B. Tin, antimony and copper
72. Hypoeutectoid steel has the structure of
Correct : D. Ferrite & pearlite
73. Which of the following hardening process is generally used for non-ferous materials?
Correct : B. Age hardening
74. Which metal has the highest melting point?
Correct : D. Chromium
75. Angularity of the square base pyramid in Vickers hardness tester is
Correct : E. 136?
76. Modulus of elasticity for steel is approximately
Correct : D. 2 x 106 kg/cm2
77. Maximum hardness that can be achieved in plain carbon steel is of the order of
Correct : C. 66 - 67 Rockwell 'C'
78. The principle on which a disappearing filamment type pyrometer works is known as
Correct : A. Wien's law
79. The percentage of sulphur in steel can be reduced by adding
Correct : D. Manganese
80. Cold worked components are generally subjected to
Correct : E. Annealing
81. If the structure of a sample consists of pearlite, cementite and free carbon, the sample may be
Correct : A. Cast iron
82. During heat treatment quenching cracks occur due to
Correct : A. irregular martensitic transformation within the article
83. If during spark test, a sample gives dull red sparks, it could be
Correct : C. Cast iron
84. Welding process used in fabrication of car bodies is
Correct : E. Resistance welding
85. Approximate Brinell Hardness number for talc is
Correct : A. 20 -- 30
86. The process for steel making being used at Rourkela steel plant is
Correct : B. L-D process
87. The hardness obtained by hardening process does not depend upon
Correct : C. Atmospheric temperature
88. Austenitic stainless steels contain chromium and nickel in amounts required to assure that even at room temperatures, the steels retain their crystalline structures, which are
Correct : A. Face centred cubic
89. The process used for making steel is
Correct : E. Any of the above
90. Formation of thick layer of scale on the surface of steel articles can be minimised by
Correct : D. Any of the above
91. Carbon percentage in steel for carburizing is usually
Correct : A. 0.15 percent
92. The operation that usually follwos hardening is
Correct : B. Normalising
93. Which of the following gives a fracture crystalline in appearance?
Correct : C. Cast iron
94. On Moh's scale, materials with hardness number less than 4 are
Correct : E. Talc, gypsum, calcite
95. Highest melting point is for
Correct : B. Wrought iron
96. Petrol engine carburetors are manufactured by
Correct : A. Die casting
97. Which metal has the highest melting point?
Correct : C. Iron
98. Bronze is an alloy
Correct : C. Copper, zinc and tin
99. Which of the following material does not have hexagonal close packed structure?
Correct : A. Alpha iron
100. The minimum carbon percentage required in steel so that it may respond to hardening by heat treatment is