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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.

20
15
2.5
7.5

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Process Equipment and Plant Design
Reflux ratio variation in a distillation column is between

Minimum and infinity
Zero and one
None of these
Zero and infinity

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

More than that for Tee (used as elbow, entering run)
Both B and C
Around 90
Less than that for Tee (used as elbow, entering run)

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

> 10
> 20
30
< 10

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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
Safety valves are provided in chemical equipments to guard against excessive

Temperature
Noise
Turbulence
Pressure/pressure fluctuation

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