As shown in the illustration, the component labeled 'E' would be identified as a ______. Illustration MO-0128

Correct Answer: Option A — waste heat boiler circulating pump

Component 'E' in auxiliary exhaust waste heat boiler schematics specifically designates the circulating pump. Under Title 46 CFR Subchapter F guidelines for marine auxiliary systems, forced circulation waste heat boilers rely on dedicated circulating pumps to maintain positive fluid velocity and prevent localized steam generation.