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Engineering Materials

Engineering Materials
An eutectoid steel consists of

Pearlite and cementite
Pearlite and ferrite
Wholly pearlite
Wholly austenite

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Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

More than
Equal to
Less than
None of these

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Engineering Materials
Recrystallization temperature can be lowered by

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

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Engineering Materials
Addition of manganese to aluminium results in

Improvement of casting characteristics
Improving machinability
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance

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Engineering Materials
The hardness of steel primarily depends on

Shape of carbides and their distribution in iron
Percentage of alloying elements
Heat treatment employed
Percentage of carbon

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Engineering Materials
The machinability of steel is increased by

Phosphorous, lead and sulphur
Phosphorous and aluminium
Silicon and sulphur
Sulphur, graphite and aluminium

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