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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

0.5 to 1%
0.012
5 to 7%
2.5 to 4.5%

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

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

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

Stack
Throat
Bosh
Tyres

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Engineering Materials
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

Remain same
First increase and then decrease
Decrease
Increase

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Engineering Materials
Bronze is an alloy of

None of these
Copper and zinc
Copper, tin and zinc
Copper and tin

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Engineering Materials
Process of Austempering results in

Lamellar layers of carbide distributed throughout the structure
Carburised structure
Formation of bainite structure
Martenistic structure

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