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Process Equipment and Plant Design

Process Equipment and Plant Design
In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

10
30
20
35

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Process Equipment and Plant Design
Which of the following material is seldom used for pressure vessel construction?

Semi-killed steel
Mild steel
Killed steel
Rimmed still

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Equal to
More than
Less than
Either B or C; depends on maximum permissible internal pressure

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Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Greater cost for the condenser coolant
All of these
Lower fixed charges for the column
Greater cost for the reboiler heat supply

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Remains same
Increases
May increase or decrease depending upon the solubility of the gas in the liquid
Decreases

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Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

45°
75°
30°
60°

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