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Engineering Materials

Engineering Materials
Aluminium bronze contains aluminium and copper in the ratio of

2.5277777777778
0.47916666666667
40 : 60
2.1180555555556

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Engineering Materials
The alloy used for making electrical resistances and heating elements is

Elinvar
Invar
Magnin
Nichrome

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Engineering Materials
Recrystallization temperature can be lowered by

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

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Engineering Materials
The compressive strength of cast iron is __________that of its tensile strength.

Less than
Equal to
None of these
More than

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Engineering Materials
In grey cast iron, carbon is present in the form of

Free carbon
Cementite
Spheroids
Flakes

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Engineering Materials
The lower critical temperature

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

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