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Engineering Materials

Engineering Materials
Super conduction by metals is observed in the temperature range of

Around 0°C
Below 10°K
Around 100°C
Above 100°K

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Engineering Materials
Cast iron is characterized by minimum of following percentage of carbon

0.008
0.02
0.013
0.002

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Engineering Materials
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

Recrystallization
Heat treatment
Precipitation
Allotropic change

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Engineering Materials
Which of the following display properties similar to that of steel?

Both (A) and (B)
Whiteheart cast iron
Blackheart cast iron
None of these

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Engineering Materials
The machinability of steel is increased by

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

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Engineering Materials
Free cutting steels

Can be cut freely
Contain carbon in free from
Require minimum cutting force
Is used where rapid machining is the prime requirement

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