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Engineering Materials

Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Steel
Brass
Aluminium
Cast iron

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Critical temperature
Yield point
Melting point
Hardness

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Engineering Materials
The lower critical temperature

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

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Engineering Materials
Quenching is not necessary when hardening is done by

Nitriding
Flame hardening
Any one of these
Case hardening

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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
Depth of hardness of steel is increased by addition of

Nickel
Chromium
Tungsten
Vanadium

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