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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

2.5 to 4.5%
5 to 7%
0.5 to 1%
0.012

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Engineering Materials
Depth of hardness of steel is increased by addition of

Vanadium
Chromium
Nickel
Tungsten

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Engineering Materials
High carbon steel carries carbon percentage

0.1 to 0.3%
0.6 to 0.8%
0.3 to 0.6%
0.8 to 1.5%

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Engineering Materials
Foundry crucible is made of

Lead
German silver
Mild steel
Graphite

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Engineering Materials
Hardness of upper bainite (acicular structure) is about

RC 65
RC 57
RC 48
RC 80

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Engineering Materials
The compressive strength of cast iron is __________that of its tensile strength.

Equal to
None of these
Less than
More than

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