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Engineering Materials

Engineering Materials
Super conduction by metals is observed in the temperature range of

Below 10°K
Around 100°C
Above 100°K
Around 0°C

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

Below recrystallization temperature
910°C
770°C
1050°C

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

Nitriding
Induction hardening
Cyaniding
Electroplating

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Does not effect
None of these
Increases
Decreases

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Engineering Materials
There are fourteen atoms in a unit cell of

Close packed hexagonal space lattice
Body centered cubic space lattice
Face centered cubic space lattice
None of these

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Engineering Materials
Bronze is an alloy of

Copper and tin
Copper and zinc
None of these
Copper, tin and zinc

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