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Engineering Materials

Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

More than
Less than
None of these
Equal to

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Engineering Materials
Isotropic materials are those which have the same

Thermal properties in all directions
Elastic properties in all directions
Electric and magnetic properties in all directions
Stresses induced in all directions

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Engineering Materials
Body centered cubic space lattice is found in

Gamma iron, aluminium, copper, lead, silver and nickel
None of these
Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Alpha iron, tungsten, chromium and molybdenum

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

Invar
Nichrome
Magnin
Elinvar

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Engineering Materials
Foundry crucible is made of

German silver
Lead
Mild steel
Graphite

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Engineering Materials
A material is known as allotropic or polymorphic if it

Has a fixed structure under all conditions
Has its atoms distributed in a random pattern
Responds to heat treatment
Exists in several crystal forms at different temperatures

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