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Engineering Materials

Engineering Materials
Eutectoid steel contains following percentage of carbon

0.003
0.008
0.0063
0.0002

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Engineering Materials
Steel made from phosphate iron is

Ductile
Hard
Tough
Brittle

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Engineering Materials
Hardness of upper bainite (acicular structure) is about

RC 80
RC 48
RC 65
RC 57

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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

Decrease
First increase and then decrease
Remain same
Increase

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

30 : 20 : 30 : 20
40 : 30 : 20 : 10
50 : 20 : 20 : 10
50 : 20 : 10 : 20

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Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Silicon
Manganese
Carbon
Sulphur

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