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Engineering Materials

Engineering Materials
Which of the following is an amorphous material?

Silver
Mica
Lead
Glass

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Engineering Materials
A reversible change in the atomic structure of steel with corresponding change in the properties is known as

Allotropic change
Molecular change
Physical change
Solidus change

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Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Copper
Nickel
Chromium
Magnesium

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Engineering Materials
The machinability of steel is increased by

Phosphorous, lead and sulphur
Silicon and sulphur
Sulphur, graphite and aluminium
Phosphorous and aluminium

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Engineering Materials
Ductility of a material can be defined as

Ability to undergo large permanent deformations in compression
All of these
Ability to recover its original form
Ability to undergo large permanent deformations in tension

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Engineering Materials
The alloy used for making electrical resistances and heating elements is

Nichrome
Magnin
Elinvar
Invar

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