Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Decrease the pressure drop
Improve the flow condition
Increase the residence time
Facilitate handling of large flow rate of liquid

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the

All of these
Sensible heat differences are small, because the temperature changes from tray to tray is small
Trouton's rule is applicable
Liquid/vapor loading across the column remains constant

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

Only if the opening is on a horizontal cylinderical vessel
Only if the opening is on spherical vessel
Only if the opening is on a vertical cylinderical vessel
Irrespective of the shape of the vessel

ANSWER DOWNLOAD EXAMIANS APP