Question 188General Subjects - 1st Asst/Chief
70% to passWhen opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?
APump capacity would be decreased.
BPump vibration would be decreased.
CPump discharge pressure would be increased.
DPump lift would be increased.
AI Explanation
The correct answer is A) Pump capacity would be decreased. As the wear ring clearance increases, the efficiency of the pump decreases, leading to a reduction in the pump's capacity. This is because the increased clearance allows more fluid to leak back from the discharge side to the suction side, bypassing the impeller and reducing the overall flow output of the pump. The other options are incorrect because: B) Increased wear ring clearance would not decrease pump vibration, C) Increased clearance would decrease discharge pressure, and D) Pump lift would not be affected by wear ring clearance.
Related Questions
Q411:Planned maintenance procedures are important to maintaining the operating condit... Q17:Salt water ballast is to be discharged into the No.6 port and starboard wing tan... Q192:According to the illustration, which of the following conditions would most like... Q193:A pneumatic pressure tank is installed in a sanitary system to _______________. Q374:While in port, ships of what propulsive power and over are required to have an o...
Ready to test your knowledge?
Take a General Subjects - 1st Asst/Chief Practice ExamOfficial Resources