You have started pumping out a Fore peak tank. The ballast pump is running showing a low discharge pressure but a positive suction pressure, Chief Engineer asks you to throttle the discharge valve to increase the back pressure on the pump. Why do you require to do the same?

A. The pump???s discharge rate needs to be controlled as it is pumping at a higher than rated capacity
B. Chief Engineer wants you to slow down as the deballasting is going on too fast and will finish sooner than expected
C. It is a misconception that pumps operate smoothly at increased back pressure and throttling of the discharge valve is a wrong practice
D. Centrifugal pumps cannot operate at greater than rated capacity, so throttling the discharge valve is only going to decrease the discharge rate below rated capacity

« Previous Next »

MCQ.Marinesite

You have started pumping out a Fore peak tank. The ballast pump is running showing a low discharge pressure but a positive suction pressure, Chief Engineer asks you to throttle the discharge valve to increase the back pressure on the pump. Why do you require to do the same?

Post a Comment

Marinesite MCQs