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 C — The tube-side fluid flow pattern is single-pass.

A single-pass heat exchanger features inlet and outlet connections on opposite ends of the shell. This configuration forces the fluid to travel the entire length of the tube bundle exactly once before exiting, which is standard for applications requiring low pressure drop and high flow rates in marine cooling systems.