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Engineering Materials

Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 65
RC 57
RC 80
RC 48

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Engineering Materials
A cold chisel is made of

Mild steel
H.S.S.
High carbon
Cast iron

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

Invar
Heat resisting steel
High speed steel
Stainless steel

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Engineering Materials
German silver contains

1% silver
No silver
5% silver
2% silver

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Engineering Materials
Addition of lead and bismuth to aluminium results in

Improving machinability
Improvement of casting characteristics
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance

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Engineering Materials
Connecting rod is usually made of

Low carbon steel
High carbon steel
Aluminium
Medium carbon steel

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