Process Equipment and Plant Design
Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

Both B and C
Permits the use of more tubes in a given shell diameter
Facilitates comparatively easier external cleaning because of large clearance
Permits the use of less tubes in a given shell diameter

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Is economical in operation
Both B & C
Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
Employs high velocity, high heat transfer rate and less heating surface requirement

ANSWER DOWNLOAD EXAMIANS APP