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Engineering Materials

Engineering Materials
Age hardening is related to

Duralumin
Silver
Brass
Copper

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Engineering Materials
The lower critical temperature

Is same for all steels
Decreases as the carbon content in steel increases
Depends upon the rate of heating
Increases as the carbon content in steel increases

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Engineering Materials
Balls for ball bearings are made of

Stainless steel
Mild steel
Carbon-chrome steel
Cast iron

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Engineering Materials
Addition of silicon to aluminium results in

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

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

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

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Engineering Materials
The property of a material due to which it breaks with little permanent distortion, is called

Ductility
Brittleness
Plasticity
Malleability

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MORE MCQ ON Engineering Materials

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