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Engineering Materials

Engineering Materials
Taps dies and drills contain carbon

Above 1%
Below 0.5%
Below 1%
Above 2.2%

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Engineering Materials
Which of the following is an amorphous material?

Glass
Mica
Lead
Silver

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

High speed steel
Invar
Heat resisting steel
Stainless steel

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Engineering Materials
There are fourteen atoms in a unit cell of

Face centered cubic space lattice
None of these
Body centered cubic space lattice
Close packed hexagonal space lattice

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

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

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Engineering Materials
A material is known as allotropic or polymorphic if it

Has its atoms distributed in a random pattern
Responds to heat treatment
Exists in several crystal forms at different temperatures
Has a fixed structure under all conditions

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