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

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

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Process Equipment and Plant Design
Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.

The corrosive and fouling fluid should be preferably routed through the tubes
The viscous fluid should be routed through the shell side
Higher pressure fluid stream should be routed through the shell side
Lower flow rate fluid should be routed through the shell side

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