Question 179General Subjects - 1st Asst/Chief70% to pass
If a centrifugal pump were continually operated with the discharge valve closed the _______________.
AI Explanation
The correct answer is B) the pump would eventually overheat.
When a centrifugal pump is operated with the discharge valve closed, the pump is unable to circulate water through the system. This causes the pump to work against its own head, resulting in no flow and no heat dissipation. Without any flow, the energy input from the motor is converted entirely into heat, causing the pump to overheat. This can potentially lead to damage to the pump components if the condition is allowed to persist.
The other options are incorrect because: A) the motor controller overload would not open, as the motor would simply overheat without any flow; C) the relief valve would not continuously cycle open, as there is no flow through the system; and D) the motor would overheat, but this is a consequence of the pump overheating due to the lack of flow.
Related Questions
#177 The simplest method to use for determining if a centrifugal pump is operating as designed is to _______________.#178 After a disassembly of a single stage centrifugal pump, one finds the outer circumference of the impeller badly pitted and worn. Not having a spare impeller on board, it is decided to turn down the impeller to eliminate the wear/pitting. What will be the pump capacity, in GPM, after the reduction of impeller diameter by 0.5 inches? GIVEN: Original pump capacity = 30 GPM Original impeller diameter = 8 in. #180 Which of the following statements is true concerning centrifugal pumps? #181 Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by _______________.#182 When ordering a new centrifugal pump for installation, what is the advantage of a pump with a double suction impeller over a single suction impeller?