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Process Equipment and Plant Design

Process Equipment and Plant Design
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

1
< 1
Equal to the order of reaction
>1

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Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

20.2
None of these
20.8
2

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

12.5
17.5
5
2.5

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Process Equipment and Plant Design
What is the value of 'q' for saturated vapor feed to a distillation column ?(where q = fraction of the feed stream that is liquid.)

> 1
1

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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

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

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Resistance offered to flow of liquids by caps & risers and the flow of gas
Large reflux ratio
Low gas velocity
Large plate spacing

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