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Process Equipment and Plant Design

Process Equipment and Plant Design
Vertical vessels are not supported by

Columns
Brackets
Saddles
Skirts

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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

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

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Process Equipment and Plant Design
Nominal size of a pipe is an indication of its __________ diameter.

Outer
Inner
None of these
Approximate

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

100 and 250
250 and 600
3 and 5
25 and 60

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Process Equipment and Plant Design
The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/4t
pd/2t
pd/t
pd/8t

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Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

2
4
1/2
8

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