Answer: b Explanation: There exist only two possible pitch types to be used in a baffle for shell and tube heat exchanger which are Square pitch and Triangular pitch.

What are the types of pitch arrangements are available for the baffles to be used in Shell and Tube HE? a) Square pitch and Rectangular pitch b) Square pitch and Triangular pitch c) Rectangular pitch and Hexagonal pitch d) Hexagonal pitch & Triangular pitch