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Engineering Materials

Engineering Materials
Maximum percentage of carbon in austenite is

0.00025
0.008
0.017
0.0026

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Engineering Materials
Which of the following statements are true for annealing of steels?

Cooling is done slowly and steadily
All of these
Internal stresses are relieved
Steels are heated to 500 to 700°C

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Engineering Materials
The presence of sulphur in pig iron makes

It easily machinable
The casting unsound
It hard
It brittle

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Engineering Materials
Shock resisting steels should have

Low wear resistance
Low tensile strength
Toughness
Low hardness

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Engineering Materials
The lower critical temperature

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

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Engineering Materials
Tungsten in high speed steel provides

Toughness
Sharp cutting edge
Hot hardness
Wear resistance

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