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
Providing a higher skirt clearance or a higher weir
Using split flow, radial flow or cascade flow for column diameter large than 4 ft

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
A stuffing box is used for

Reducing the resistance of fluid flow
Facilitating smooth opening and closing of a valve
Absorbing the contraction/expansion of pipeline due to temperature changes
Prevention of fluid leakage around moving parts

ANSWER DOWNLOAD EXAMIANS APP