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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

3000
1000
5000
10000

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3
1.6 to 2
1.3 to 2
2.5

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Process Equipment and Plant Design
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

None of these
Ultimate stress to working stress
Working stress to ultimate stress
Ultimate stress to breaking stress

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Process Equipment and Plant Design
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.

>5
4 to 5
1.5 to 2
3 to 4

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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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