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Process Equipment and Plant Design

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

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

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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
2.5
1.3 to 2
1.6 to 2

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Process Equipment and Plant Design
for couplings and unions would be

350
Negligible
200
60

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Process Equipment and Plant Design
For high pressure process equipments/vessels, the connected nozzle should be

Flanged
Screwed
Welded
Brazed

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/15th
l/30th
l/50th
l/5th

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Process Equipment and Plant Design
Which of the following material is seldom used for pressure vessel construction?

Killed steel
Semi-killed steel
Rimmed still
Mild steel

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