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Process Equipment and Plant Design

Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

40°
80°
20°
60°

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

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Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

2 ft irrespective of (for column > 3 ft diameter)
0.6-0.8 times
Twice
Equal to

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Process Equipment and Plant Design
For turbine agitator, the impeller diameter is about

0.3 to 0.5 d
0.95 d
0.1 to 0.2 d
0.65 to 0.85 d

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Process Equipment and Plant Design
An adequate clearance between the tray and the shell wall of a distillation column is provided to

Drain the liquid from the tray when the unit is not in operation
Avoid back-trapping
Allow for thermal expansion and facilitate installation
None of these

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

1.5 to 2.5
0.01 to 1
5 to 10
10 to 20

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