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Engineering Materials

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

RC 65
RC 80
RC 48
RC 57

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Engineering Materials
Age-hardening is related with

Gun metal
German silver
Stainless steel
Duralumin

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Engineering Materials
The addition of which of the following improves machining of copper?

Sulphur
Tin
Zinc
Vanadium

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Engineering Materials
Which is the false statement about wrought iron? It has

High resistance to rusting and corrosion
Uniform strength in all directions
Ability of hold protective coating
High ductility

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Engineering Materials
Maximum percentage of carbon in austenite is

0.0026
0.017
0.008
0.00025

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Engineering Materials
Beryllium bronze contains

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

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