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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

7.5
20
15
2.5

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Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

It reduces heat transfer area
It makes condenser compact
Pressure drop is reduced
More thinner tubes can be used

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Process Equipment and Plant Design
In perforated plate towers, the

Total hole area may be around 6 to 15% of tower cross-sectional area
Pressure drop is less compared is similar bubble cap towers
Hole sizes may be around 1/8" or 3/16"
All of these

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Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Less than
More than
Either more or less (depending upon relative volatility)
Same as

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Process Equipment and Plant Design
A claming section before the liquid flows into the downcomer is privided to

Ensure better vapour-liquid contact
Reduce the discharge fluctuation
Permit release of entrained vapour in the liquid
Cool the liquid before it flows down

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Process Equipment and Plant Design
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

1.2-1.5
0.4-0.9
0.2-0.5
0.1-0.2

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