31. |
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as
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Answer:
Option (b) |
32. |
The lower critical point for all steels is
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Answer:
Option (c) |
33. |
Steel containing 0.8 to 1.5% carbon, is known as
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Answer:
Option (d) |
34. |
Steel containing upto 0.15% carbon, is known as
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Answer:
Option (b) |
35. |
An eutectoid steel consists of
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Answer:
Option (a) |
36. |
The hardness of steel depends upon the
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Answer:
Option (a) |
37. |
Nickel when added to copper improves
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Answer:
Option (b) |
38. |
The addition of which of the following improves machining of copper?
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Answer:
Option (a) |
39. |
Silicon when added to copper improves
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Answer:
Option (c) |
40. |
Shock resistance of steel is increased by adding
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Answer:
Option (c) |