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Process Equipment and Plant Design

Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Low gas velocity
High gas velocity
Low reflux ratio
Excessive liquid gradient over the tray

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Process Equipment and Plant Design
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?

Heat transfer rate is independent of tube arrangement
Square pitch
Triangular pitch
Diagonal square pitch

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Radial
Circumferential
Both A & B
Neither A nor B

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Process Equipment and Plant Design
Spherical shaped pressure vessel is considered to be the most ideal, because it can

Withstand higher pressure for a given metallic shell thickness
Be supported very easily
Be designed without wind load considerations
Be fabricated very easily

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Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

20°
60°
80°
40°

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Process Equipment and Plant Design
The stress developed in a material without any permanent set is called the

Elastic limit
Breaking stress
Ultimate stress
Yield stress

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