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Material Science Section-2

61. In compression, a prism of brittle material will break:

by forming a bulge
by shearing along oblique plane
in direction perpendicular to application of load
by crushing into thousand of pieces
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62. Isotropic material are those which have the same:

elastic properties in all direction
stress induced in all direction
thermal properties in all direction
electric and magnetic properties in all direction
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63. The metallic structure of mild steel is:

BCC
HCP
Cubic structure
Orthorhombic
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64. Iron is:

paramagnetic
ferromagnetic
ferrielectric
dielectric
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65. Chilled cast iron has:

no graphite
a very high percentage of graphite
a low percentage of graphite
graphite as it’s basic constituent of composition
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66. Maximum percentage of carbon in ferrite is:

0.025%
0.06%
0.1%
0.25%
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67. The most effective inhibitor, when added in small quantities is:

carbon
vanadium
magnesium
cobalt
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68. A cold chisel is made of:

mild steel
cast iron
HSS
high carbon
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69. Brass is an example of:

substitutional solid solution
interstitial soild solution
intermetallic compound
all of the above
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70. Hardness of lower banite (tempered martensite) is:

RC 65
RC 48
RC 57
RC 80
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71. Connecting rod is usually made of:

aluminium
low carbon steel
medium carbon steel
high carbon steel
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72. Cupola produces following material:

cast iron
pig iron
wrought iron
malleable iron
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