If a higher than normal water level is observed through the inspection port of a flash evaporator, you should suspect __________.

Correct Answer: Option C — a malfunctioning brine pump

A high water level in a flash evaporator indicates that the brine is not being removed as quickly as it is being produced. A malfunctioning brine pump fails to maintain the required discharge rate, causing the brine level to rise within the shell, potentially leading to carryover into the distillate.