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Engineering Materials

Engineering Materials
Nickel when added to copper improves

Strength and ductility
Hardness and strength
Machinability
Hardness

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Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Silicon
Lead and bismuth
Magnesium
Copper

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Engineering Materials
Hardness of martensite is about

RC 65
RC 48
RC 57
RC 80

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Engineering Materials
Induction hardening is the process of

Heating and cooling rapidly
Increasing hardness throughout
Hardening surface of work-piece to obtain hard and wear resistant surface
Inducing hardness by continuous process

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Engineering Materials
Shock resistance of steel is increased by adding

Chromium
Nickel and chromium
Sulphur, lead and phosphorus
Nickel

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Engineering Materials
Addition of lead and bismuth to aluminium results in

Improvement of corrosion resistance
Improvement of casting characteristics
One of the best known age and precipitation hardening systems
Improving machinability

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