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Engineering Materials

Engineering Materials
Hardness of martensite is about

RC 65
RC 57
RC 48
RC 80

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Engineering Materials
Which of the following is an amorphous material?

Lead
Silver
Mica
Glass

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Does not effect
None of these
Increases
Decreases

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Engineering Materials
Wrought iron

Is a ductile material
Can be easily forged or welded
All of these
Cannot stand sudden and excessive shocks

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Engineering Materials
White cast iron has

High compressive strength
Low tensile strength
Carbon in the form of carbide
All of these

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Engineering Materials
Quenching is not necessary when hardening is done by

Nitriding
Case hardening
Any one of these
Flame hardening

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