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Engineering Materials

Engineering Materials
Which of the following alloys does not have copper as one of the constituents?

Monel metal
Constantan
Nichrome
Delta metal

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Engineering Materials
The following element can't impart high strength at elevated temperature

Manganese
Silicon
Magnesium
Nickel

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Engineering Materials
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

Precipitation
Recrystallization
Allotropic change
Heat treatment

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Engineering Materials
Age-hardening is related with

Duralumin
Stainless steel
German silver
Gun metal

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Engineering Materials
Brass contains

90% copper and 10% tin
70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel
70 - 75% copper and rest tin

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Engineering Materials
The heat treatment process used for softening hardened steel is

Carburising
Annealing
Normalizing
Tempering

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