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Engineering Materials

Engineering Materials
Which of the following is an amorphous material?

Mica
Glass
Lead
Silver

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Engineering Materials
The lower critical temperature

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

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Engineering Materials
Cast iron is a

Tough material
Malleable material
Brittle material
Ductile material

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Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

1500°C to 1700°C
400° to 700°C
1200°C to 1300°C
800°C to 1000°C

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Engineering Materials
Monel metal contains

88% copper and 10% tin and rest zinc
Malleable iron and zinc
Alloy of tin, lead and cadmium
63 to 67% nickel and 30% copper

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Engineering Materials
Addition of lead and bismuth to aluminium results in

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

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