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
Permits the use of less tubes in a given shell diameter
Facilitates comparatively easier external cleaning because of large clearance

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Generally, elliptical dished heads

Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D
All of these
Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter
Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²

ANSWER DOWNLOAD EXAMIANS APP