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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
Ferromagnetic alpha iron exists in temperature range of

770 to 910°C
1400 to 1539°C
Below 723°C
910 to 1440°C

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Engineering Materials
Permalloy is a

Polymer
None ferrous alloy
Kind of stainless steel
Nickel and iron alloy having high permeability

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Engineering Materials
Cast iron is a

Ductile material
Tough material
Brittle material
Malleable material

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Engineering Materials
Beryllium bronze contains

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

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.05 to 0.20%
0.45 to 0.55%
0.20 to 0.45%
0.55 to 1.0%

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