Referring to the illustrated steam plant seawater cooling system drawing, which pump is considered a high-head pump operating with the highest discharge pressure? Refer to Illustration SP-SW-01

Correct Answer: Option D — Any of the sea water service pumps are considered high-head pumps.

Sea water service pumps are designed to provide cooling water to various heat exchangers throughout the ship, requiring them to overcome significant piping friction and elevation head. Consequently, they operate at higher discharge pressures compared to circulating pumps, which primarily move large volumes of water through low-resistance cooling loops.