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Engineering Materials

Engineering Materials
Compressive strength of grey cast iron in tonnes/cm is of the order of

710
57
1015
35

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

Less than
More than
None of these
Equal to

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Engineering Materials
Addition of manganese to aluminium results in

One of the best known age and precipitation hardening systems
Improvement of corrosion resistance
Improving machinability
Improvement of casting characteristics

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Engineering Materials
Cast iron is a

Brittle material
Malleable material
Tough material
Ductile material

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Engineering Materials
A small percentage of boron is added to steel in order to

Reduce machinability
Increase endurance strength
Increase wear resistance
Increase hardenability

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Engineering Materials
The hardness of steel primarily depends on

Heat treatment employed
Percentage of carbon
Shape of carbides and their distribution in iron
Percentage of alloying elements

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