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Engineering Materials

Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

Surface defect
Line defect
Point defect
None of these

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Engineering Materials
In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled

Any one of these
Slowly in the furnace
Suddenly in a suitable cooling medium
In still air

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Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

None of these
More than
Less than
Equal to

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Engineering Materials
Which is false statement about properties of aluminium?

Modulus of elasticity is fairly low
Creep strength limits its use to fairly low temperatures
Wear resistance is very good
Fatigue strength is not high

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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
Grey cast iron has

Carbon in the form of free graphite
Low compressive strength
High tensile strength
All of these

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