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Engineering Materials

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

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

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

RC 48
RC 80
RC 57
RC 65

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Engineering Materials
Basic constituents of Monel metal are

Nickel, molybdenum
Nickel, copper
Zinc, tin, lead
Nickel, lead and tin

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Engineering Materials
Which of the following is not the correct method of increasing fatigue limit?

Shot peening
Cold working
Nitriding of surface
Surface decarburisation

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Engineering Materials
The main alloying elements high speed steel in order of increasing proportion are

Tungsten, chromium, titanium
Chromium, titanium, vanadium
Tungsten, titanium, vanadium
Vanadium, chromium, tungsten

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Engineering Materials
Hardness of martensite is about

RC 57
RC 80
RC 48
RC 65

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