51. |
Free cutting steels
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Answer:
Option (c) |
52. |
Combined carbon in iron makes the metal
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Answer:
Option (d) |
53. |
Free carbon in iron makes the metal
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Answer:
Option (a) |
54. |
The lower critical temperature
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Answer:
Option (c) |
55. |
A fine grained steel
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Answer:
Option (b) |
56. |
A coarse grained steel
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Answer:
Option (a) |
57. |
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as
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Answer:
Option (b) |
58. |
A steel with 0.8% carbon is known as
|
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Answer:
Option (a) |
59. |
Steel containing 0.8 to 1.5% carbon, is known as
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Answer:
Option (d) |
60. |
Eutectoid reaction occurs at
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Answer:
Option (b) |