Process Equipment and Plant Design
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the

Shell side for large overall heat transfer co-efficient
Shell side, if the flow is counter-current and tube side if the flow is co-current
Tubes to avoid the expansion of high pressure shell construction
Shell side for smaller total pressure drop

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
A stuffing box is used for

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

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

Feed is not at its bubble point
Relative volatility is close to one (e.g., separation of close boiling isomers)
Number of equilibrium stages in only stripping section is to be calculated
Number of equilibrium stages required is likely to be very small

ANSWER DOWNLOAD EXAMIANS APP