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ENGINEERING MATERIALS

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

Cyaniding
Induction hardening
Electroplating
Nitriding

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

Copper
Lead and bismuth
Magnesium
Silicon

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

Melting point
Critical temperature
Hardness
Yield point

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Engineering Materials
Following elements have face-centered cubic structure

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

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Engineering Materials
The crystal structure of brass is

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

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