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Engineering Materials

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

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

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Engineering Materials
Solder is an alloy consisting of

Tin and lead
Tin, antimony, copper
Lead and zinc
Tin and copper

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Engineering Materials
The molecules in a solid move

In circular motion
In a haphazard way
Back and forth like tiny pendulums
In a random manner

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Engineering Materials
In compression, a prism of brittle material will break

By forming a bulge
By shearing along oblique plane
In direction perpendicular to application of load
By crushing into thousands of pieces

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Engineering Materials
The toughness of a material __________ when it is heated.

Decreases
None of these
Increases
Remain same

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Engineering Materials
Hardness of martensite is about

RC 65
RC 57
RC 48
RC 80

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