In a diesel engine closed freshwater cooling system, the cooling water pressure drop through the engine is 10 psig, and the pressure drop through the heat exchanger is 4 psig at maximum flow rates. The cooling water pump must produce a discharge head of at least __________.

Question

Accepted Answer

Option D: 15 psig. Total pump discharge head must overcome the combined maximum pressure drops across both the engine and heat exchanger, plus safety margins, yielding approximately 15 psig.