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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

Fluid in
Nozzle or rim
Ring plate
Flared out

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Process Equipment and Plant Design
Which of the following lengths of heat exchanger tubes are normally not used in practice?

10 metres
0.5 metre
2.5 metres
6 metres

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Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

CO₂
SO₂
NH₃
None of these

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Process Equipment and Plant Design
With increase in the number of shell passes, the value of FT

Decreases
Increases
Remains same
Remains same, only if the number of tube passes does not change

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Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Neither A nor B
Results in higher pressure drop per tray
Leads to high tray efficiency
Both A & B

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