Process Equipment and Plant Design
Pick out the wrong statement pertaining to the use of valve tray, seive tray and bubble cap trays in continuous distillation column.

Murphree efficiency of all the three trays are nearly equal, however the peak efficiency is generally higher for seive and valve trays than the bubble cap
Bubble cap trays though most expensive are the best in situations, where low vapour rates is to be handled and a positive liquid seal is essential at all flow rates
Valve trays have the highest turn down ratio (i.e. the ratio of the highest to the lowest vapour flow rates) and thus provides the maximum flexible operating range
Maintenance cost for valve and seive trays are comparatively more than bubble cap tray due to their relatively complicated construction features

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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.

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

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