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Engineering Materials

Engineering Materials
Drop forging dies contain carbon of the order of

0.7 to 0.9%
0.25 to 0.5%
0.6 to 0.7%
0.1 to 0.2%

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Engineering Materials
Quenching is not necessary when hardening is done by

Case hardening
Flame hardening
Nitriding
Any one of these

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Engineering Materials
The silicon steel is widely used for

Generators and transformers in the form of laminated cores
Motor car crankshafts
Cutting tools
Connecting rods

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Titanium alloys
Magnesium alloys
Magnetic steel alloys
Chromium alloys

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

Steel
Aluminium
Brass
Cast iron

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Engineering Materials
The lower critical temperature

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

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