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Engineering Materials

Engineering Materials
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Nickel
Vanadium
Chromium
Cobalt

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

Constant for all metals
The points where there is no further flow of metal
The points where no further change occurs
The points of discontinuity

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Engineering Materials
Preheating is essential in welding

All of these
All nonferrous materials
Cast iron
High speed steel

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Engineering Materials
A cold chisel is made of

High carbon
Cast iron
Mild steel
H.S.S.

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Engineering Materials
Cast iron is a

Tough material
Malleable material
Brittle material
Ductile material

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Engineering Materials
Foundry crucible is made of

Mild steel
German silver
Graphite
Lead

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