Process Equipment and Plant Design
Le/D for fully open gate valves would be

Much more than that for fully open globe valves
Much less (say 2% than that for fully open globe valves)
Around 7
Both B and C

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Weep holes provided in the plates of a distillation column

All of these
Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid
Must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation
Facilitate draining out liquid from a tray when the unit is not in operation

ANSWER DOWNLOAD EXAMIANS APP