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Engineering Materials

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

RC 48
RC 57
RC 65
RC 80

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Engineering Materials
The hardness and tensile strength in austenitic stainless steel can be increased by

Normalizing
Martempering
Hardening and cold working
Full annealing

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Engineering Materials
Shock resistance of steel is increased by adding

Nickel and chromium
Nickel
Chromium
Sulphur, lead and phosphorus

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points where there is no further flow of metal
The points where no further change occurs
The points of discontinuity
Constant for all metals

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Engineering Materials
Beryllium bronze contains

99% copper and 1% beryllium
80% copper and 20% beryllium
60% copper and 40% beryllium
97.75% copper and 2.25% beryllium

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Engineering Materials
Which of the following display properties similar to that of steel?

Whiteheart cast iron
Both (A) and (B)
None of these
Blackheart cast iron

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