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Engineering Materials

Engineering Materials
Steel made from phosphate iron is

Hard
Ductile
Brittle
Tough

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

Brittleness
Malleability
Plasticity
Ductility

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Engineering Materials
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

White cast iron
Alloy cast iron
Nodular cast iron
Malleable cast iron

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

Equal to
None of these
Less than
More than

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

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

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Engineering Materials
German silver is an alloy of

Silver and some impurities
Nickel, Copper and zinc
Nickel and copper
Refined silver

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