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Engineering Materials

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

RC 48
RC 80
RC 57
RC 65

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Engineering Materials
Preheating is essential in welding

Cast iron
All nonferrous materials
All of these
High speed steel

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Engineering Materials
Manganese is added in low carbon steel to

Raise the yield point
All of these
Make the steel ductile and of good bending qualities
Make the steel tougher and harder

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Engineering Materials
Which of the following alloys does not have copper as one of the constituents?

Monel metal
Constantan
Nichrome
Delta metal

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

Vanadium
Tungsten
Chromium
Nickel

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Engineering Materials
The machinability of steel is increased by

Silicon and sulphur
Phosphorous, lead and sulphur
Phosphorous and aluminium
Sulphur, graphite and aluminium

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