What factor would NOT cause a centrifugal cargo pump to lose suction?

A high cargo level in tanks would not cause a centrifugal cargo pump to lose suction because, in fact, it can help maintain suction. Centrifugal pumps rely on the pressure differential created by the difference in height between the liquid level in the tank and the suction inlet of the pump. When the cargo level is high, it can supply a sufficient head pressure to ensure that the pump remains primed and can draw the liquid without losing suction.

In contrast, obstructions in the discharge line can restrict flow and create back pressure, which may lead to a loss of suction. Pump malfunction, such as wear or damage to impellers, can disrupt the pump's ability to generate the necessary pressure. Poor priming of the pump results in air being present at the pump inlet, preventing the pump from effectively drawing in fluid, which is critical for maintaining its operation.