Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

All of these
Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must
Using split flow, radial flow or cascade flow for column diameter large than 4 ft
Providing a higher skirt clearance or a higher weir

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a basket type evaporator.

The tube bundle is suspended on bracket
There is no central downtake
It is used for high viscosity liquor having large rate of scaling
Downtake is formed by the annular space between the bundle and the shell

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