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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 following element can't impart high strength at elevated temperature

Nickel
Silicon
Magnesium
Manganese

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Engineering Materials
Delta iron occurs at temperature of

Above melting point
Between 1400°C and 1539°C
Room temperature
Between 910°C and 1400°C

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Engineering Materials
Recrystallization temperature can be lowered by

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

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Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Malleability
Plasticity
Elasticity
Ductility

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Engineering Materials
The purpose of heat treatment is to

Change grain size
Modify the structure of the material
Any one of these
Relieve the stresses set up in the material after hot or cold working

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