1. Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as
Correct : A. Spheroidizing
2. During stress relaxation phenomenon
Correct : E. None of the above
3. The materials which has the same elastic properties in all directions is called
Correct : D. Isotropic material
4. Accounstical materials
Correct : D. Reflect sound
5. Recrystallistion temperature is one
Correct : C. At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated
6. Super conductors
Correct : A. Exist at temperatures below 10?K
7. In powder metallurgy the process of heating the cold pressed metal powder is known as
Correct : A. Sintering
8. The main constituent of glass is
Correct : E. SiO2
9. In iron-iron carbide diagram the
Correct : C. Abscissa is carbon percentage
10. Spot the process which is different from others?
Correct : A. Galvanizing
11. The Curic point for Rochelle salt is about
Correct : C. 240?C
12. Which of the following is the ductile material?
Correct : D. Silver
13. The structure of a semi-conductor resemles that of a
Correct : C. diamond
14. In electro-forming the metal is supplied to the mould from
Correct : C. Electrolytic solution in which bar of pure metal acts as an anode for the plating current
15. A bot in cupola is
Correct : A. A part of coupla
16. Constantan is an alloy of
Correct : D. Copper and Nickel
17. Hot tear
Correct : A. Is a defect in castings
18. Coarse grained steels
Correct : B. Are less tough
19. In press work the dies that perform two or more operations simultaneously, but at different stations are known as
Correct : E. Progressive dies
20. Vanadium is added to steel as an alloying element to
Correct : A. To soften the material
21. Micro-structure of a material is generally examined by
Correct : E. Microscope
22. Ferri-magnetic materials generally find application as
Correct : D. semi-conductors
23. Which process is used for machining parts to planned dimensions?
Correct : E. Routing
24. Polymers
Correct : E. Can neither be vaporised nor recycled
25. Which of the following is a fuel used in fast reactors?
Correct : B. Plutonium
26. Cold work is done on the metal
Correct : A. Below the thermal critical range
27. Which of the following timber is used for sports goods?
Correct : A. Mulberry
28. The statement that, at equilibrium, the number of phases plus the degrees of freedom must equal the number of components plus two is known as
Correct : A. Gibbs phase rule
29. Steel balls for ball bearings are hardened to
Correct : C. 700-800 VPN
30. Muntz metal contains
Correct : D. Copper-zinc
31. Corrosion is a destructive attack on metals
Correct : A. Which may be chemical or electrochemical in nature
32. The depth hardness of steel increases by the addition of
Correct : E. Chromium
33. Dielectric strength of a material is
Correct : A. Capacity to withstand high voltage
34. The presence of sulphur in pig iron makes
Correct : A. Its casting unsound
35. Shot blasting is the process for the cleaning of
Correct : E. Castings
36. The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as
Correct : D. Galvanizing
37. The process of producing parts by electrolytic deposition of metal upon a conductive removable mould or matrix is known as
Correct : E. Electro forming
38. Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
Correct : D. Heterogeneous
39. Chromium when added as an alloying element to steels
Correct : A. Increases corrosion resistance
40. The essential gradient of any hardened steel is
Correct : A. Martensite
41. Which type of thermostat is generally used in applicances with heating elements?
Correct : A. Bimetallic
42. In order to measure/detect materials by non-destructive testing the method generally used is
Correct : E. Acoustic emission
43. The defect blow hole in castings is caused due to
Correct : E. Any of the above
44. Spring steels should have high resistance to
Correct : D. Deformation
45. The specific gravity of cast iron is closer to
Correct : C. 7
46. The theory of failure generally applied in case of brittle materials is
Correct : B. Maximum principal stress theory
47. All of the following are destructive tests on materials EXCEPT
Correct : E. Shore's scleroscope hardness test
48. If steel is quenched in oil the structure obtained is
Correct : B. Troosite
49. Which of the following is p-type semi-conductor?
Correct : C. Silicon doped with gallium
50. The amount of energy expended by the action of external force in deforming an elastic body is known as
Correct : C. Strain energy
51. When the atomic magnetic moments are randomly oriented in a solid, its magnetic behaviour is termed as
Correct : C. paramagnetic
52. Plastic are
Correct : D. Bad conductors of heat as well as electricity
53. Which of the following does not contain copper as one of the alloying elements?
Correct : C. Nichrome
54. When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be
Correct : A. Anisotropic
55. The product of blast furnace is known as
Correct : B. Steel
56. The defect responsible for the phenomenon of slip, by which most metals deform plastically, is known as
Correct : C. Dislocation
57. In a 0.2% carbon steel which has been heated above the third critical temperature on cooling at the first critical point the austenite remaining in solution is transformed to new structure called
Correct : E. Pearlite
58. Which material has the best damping capacity
Correct : A. Cast iron
59. If a material recovers its original dimensions, when the load is removed, it is known as
Correct : A. Elastic
60. In plain carbon steel as the percentage of carbon increases from 0.2% to 0.8% which of the following decreases?
Correct : C. Percentage elongation
61. In press work the dies which combine two or more operations at one station are known as
Correct : D. Compound dies
62. Spring steel sections are originally applied in
Correct : C. Annealed condition
63. Which of the following ray has least wavelength?
Correct : D. Cosmic rays
64. Cheek is
Correct : E. Intermediate flask between copes and drag
65. Which of the following is 'acceptor' impurity for semi-conductor?
Correct : C. Boron
66. The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is
Correct : B. Hysteresis
67. Electronic structure of a material is generally studied by
Correct : E. Spectroscope techniques
68. Steel castings
Correct : C. Are weldable
69. Cold shuts are
Correct : C. Defects in castings due to two streams of metal which are too cold to fuse properly
70. The property of metal when the recovery after unloading is complete but not instantaneous is
Correct : C. An elasticity
71. Cast irons are generally specified by
Correct : C. Tensile strength
72. Identify the incorrect statement
Correct : B. Much greater pressures are needed for ot working than for cold working
73. Galvanizing is generally done on
Correct : A. Low carbon steels
74. A Babitt is
Correct : A. A cutectic of iron and iron phosphide
75. Which of the following colour of light has the least wavelength?
Correct : A. Violet
76. The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as
Correct : E. Spheroidising
77. The fine grained steel
Correct : C. Are doctile
78. An atom containing an odd number of electrons is said to be
Correct : B. Paramgnetic
79. For heavy loads in aircraft bearings the material used with lead to reduce the risk of scizure is
Correct : A. Silver
80. The raw material for mini steel plants is
Correct : D. CI and steel scrap
81. Which type of electron pair exists in a semi-conductor?
Correct : C. Homopolr
82. A body which is permanently deformed is said to have undergone
Correct : C. Uniform deformation
83. In Charpy impact test, the specimen is held as a
Correct : B. simply supported beam
84. Materials which lack permanent magnetic dipoles are called
Correct : A. diamagnetic
85. The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, is
Correct : A. Silicon
86. Which of the following materials demonstrate viscoelastic behaviour?
Correct : D. Non-crystalline organic polymers
87. Carbon steel is
Correct : A. An alloy of carbon and iron with varying quantities of phosphorous
88. A hydrogen atom has
Correct : B. No neutrons
89. Which one is different from the others in press work
Correct : E. Notching
90. Which of the following properties has lower value for copper as compared to aluminium?
Correct : C. Electrical resistivity
91. A bearing alloy should have
Correct : C. All above
92. When a loop composed of two dissimilar metals could be made to carry a continuous current simply by maintaining the two junctions at different temperatures, the above effect is known as
Correct : D. Seeback effect
93. All of the following are point defects EXCEPT
Correct : B. dislocations
94. The limiting load beyond which the material no longer behaves elastically is known is
Correct : E. Elastic limit
95. When elastic limit is reached
Correct : A. Tensile strain decreases in proportion to stress
96. In general, high cohesive forces are related to
Correct : A. Large values of elastic constants
97. Hardness may be defined as resistance to
Correct : E. Any of the above
98. The theory of failure which gives fairly good results for the ductile materials is
Correct : E. Maximum shear strain energy theory
99. Which of the following factor has the least effect on the electrical conductivity of wires made of copper alloy?
Correct : E. Intensity of any incident light
100. Thermoplastic and thermoset polymers differ in