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Chemical Engineering Basics

Chemical Engineering Basics
Which of the following will resist maxi-mum shock & vibration without cracking?

White cast iron
Malleable iron
Graphite
Grey cast iron

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Chemical Engineering Basics
In a casting, cold shut defect is caused by

Faulty gating system
Low pounhg temperature
Melt-mould reactions
Very low mould permeability

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Chemical Engineering Basics
Materials having __________ lattice structure are usually the most ductile.

None of these
Hexagonal close packed (hcp)
Face centred cubic (fcc)
Body centred cubic (bcc)

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Chemical Engineering Basics
With increase in steam pressure, its specific volume decreases

Rapidly first and then slowly
Exponentially
Slowly first and then rapidly
Linearly

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Chemical Engineering Basics
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then

It will be cavitated
It will not develop sufficient head to raise water
It will deliver low discharge of liquid
Its efficiency will not be affected

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Chemical Engineering Basics
Grain hardness is measured by the __________ hardness testing method.

Knoop
Vicker's
Shore sceleroscope
Rockwell F

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