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Engineering Materials

Engineering Materials
The property of a material which enables it to retain the deformation permanently, is called

Malleability
Ductility
Plasticity
Brittleness

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Engineering Materials
The purpose of heat treatment is to

Relieve the stresses set up in the material after hot or cold working
Change grain size
Any one of these
Modify the structure of the material

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Engineering Materials
Iron is

Ferromagnetic
Ferroelectric
Dielectric
Paramagnetic

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

Cyaniding
Nitriding
Electroplating
Induction hardening

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Engineering Materials
The compressive strength of cast iron is __________that of its tensile strength.

Equal to
None of these
Less than
More than

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Engineering Materials
Recrystallization temperature can be lowered by

All of these
Grain refinement
Purification of metal
Working at lower temperature

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