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ENGINEERING MATERIALS

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

Electroplating
Induction hardening
Cyaniding
Nitriding

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

Copper
Silicon
Lead and bismuth
Magnesium

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Critical temperature
Yield point
Melting point
Hardness

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Engineering Materials
Following elements have face-centered cubic structure

A iron (below 910°C and between 1400 to 1539°C), W
All of these
Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
Mg, Zn, Ti, Zr, Br, Cd

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Engineering Materials
The crystal structure of brass is

F.C.C.
Orthorhombic crystalline structure
H.C.P.
C.C.

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