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Engineering Materials

Engineering Materials
According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

0.6 to 0.8%
0.4 to 0.6%
0.35 to 0.45%
0.0004

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Engineering Materials
Wrought iron

Is a ductile material
All of these
Can be easily forged or welded
Cannot stand sudden and excessive shocks

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Engineering Materials
Following elements have face-centered cubic structure

All of these
Mg, Zn, Ti, Zr, Br, Cd
Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
A iron (below 910°C and between 1400 to 1539°C), W

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Engineering Materials
The charge is fed into the blast furnace through the

Throat
Tyres
Bosh
Stack

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Engineering Materials
Bell metal contains

85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70 - 75% copper and rest tin
70% copper and 30% zinc

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Engineering Materials
Recrystallization temperature can be lowered by

Grain refinement
All of these
Purification of metal
Working at lower temperature

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