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Engineering Materials

Engineering Materials
Drop forging dies contain carbon of the order of

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

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Engineering Materials
Pig iron is the name given to

Iron containing huge quantities of carbon
Raw material for blast furnace
Iron in molten form in the ladles
Product of blast furnace made by reduction of iron ore

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Engineering Materials
The lower critical temperature

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

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Engineering Materials
The presence of hydrogen in steel causes

Embrittlement
Corrosion resistance
Reduced neutron absorption cross-section
Improved Weldability

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Engineering Materials
Phosphor bronze contains

None of these
2.5% phosphorous
0.5% of phosphorous
1% phosphorous

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Engineering Materials
Silicon when added to copper improves

Hardness
Machinability
Strength and ductility
Hardness and strength

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