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Engineering Materials

Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Induction hardening
Cyaniding
Electroplating
Nitriding

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

Constantan
Monel metal
Nichrome
Delta metal

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Engineering Materials
Gamma-iron occurs between the temperature ranges of

400°C to 600°C
1400°C to 1530°C
600°C to 900°C
900°C to 1400°C

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

Does not effect
None of these
Lowers
Raises

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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

Recrystallization
Precipitation
Allotropic change
Heat treatment

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Engineering Materials
Machining properties of steel are improved by adding

Silicon, aluminium, titanium
Chromium, nickel
Sulphur, lead, phosphorous
Vanadium, aluminium

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