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Engineering Materials

Engineering Materials
The heat treatment process used for softening hardened steel is

Carburising
Normalizing
Tempering
Annealing

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Engineering Materials
A material is said to be allotropic, if it has

Fixed structure at all temperatures
Atoms distributed in random pattern
Different crystal structures at different temperatures
Any one of the above

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Engineering Materials
Cupola produces following material

Wrought iron
Malleable iron
Cast iron
Pig iron

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Engineering Materials
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

Hypoeutectic cast irons
Eutectic cast irons
Hypereutectic cast irons
None of these

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Engineering Materials
Connecting rod is, usually, made from

High speed steel
High carbon steel
Medium carbon steel
Low carbon steel

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Engineering Materials
Addition of manganese to aluminium results in

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

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