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Chemical Engineering Basics

Chemical Engineering Basics
The best criterion for analysing an economic investment is the

Present value method
Future value method
Rate of return criterion
Salvage value

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Chemical Engineering Basics
Which of the following materials has the maximum shrinkage allowance ?

Aluminium alloy
Cast iron
Lead
Brass

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Chemical Engineering Basics
Chlorine acts as a bleaching agent only in the presence of

Moisture
Sunlight
Dry air
Pure oxygen

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Chemical Engineering Basics
Which one is neutral in character ?

N₂O₅
N₂O₄
N₂O₃
N₂O

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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
Its efficiency will not be affected
It will deliver low discharge of liquid

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Chemical Engineering Basics
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Beryllia
Alumina
Magnesia
Zirconia

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