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Engineering Materials

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

2.1180555555556
2.5277777777778
0.47916666666667
40 : 60

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Engineering Materials
Hardness of martensite is about

RC 48
RC 65
RC 57
RC 80

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Engineering Materials
When medium carbon steel is heated to coarsening temperature

The average grain size is a minimum
The grain size increases very rapidly
There is no change in grain size
The grain size first increases and then decreases very rapidly

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Engineering Materials
Delta-iron occurs between the temperature ranges of

900°C to 1400°C
1400°C to 1530°C
400°C to 600°C
600°C to 900°C

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Engineering Materials
The material in which the atoms are arranged chaotically, is called

Crystalline material
Amorphous material
None of these
Mesomorphous material

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

Raises
Does not effect
Lowers
None of these

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