If a seawater-cooled shell-and-tube lubricating oil cooler has the seawater inlet and outlet connections on the opposite end water boxes, in terms of the number of passes, what statement is true?

Correct Answer: Option B — The tube-side fluid flow pattern is single-pass.

A single-pass design requires the fluid to enter one water box and exit the opposite end without returning. If the inlet and outlet connections are located on opposite ends, the fluid traverses the tube bundle exactly once. This configuration is common in high-flow, low-pressure-drop marine heat exchanger applications.