One of three available centrifugal salt...

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Question 1 of 205eccef9bbacbc34ba4d454dc

One of three available centrifugal salt water service pumps is in operation with a sea water temperature of 50°F. The cooling temperature of all systems supplied by this pump appear to be high. Therefore, you should __________.

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🔍 Key Concepts

• Centrifugal pump operation and what happens if it loses prime or gets air-bound • Effect of sea water temperature vs flow rate on cooling system temperatures • How to use discharge pressure changes to diagnose pump performance problems

💭 Think About

• If all systems are running hot but sea water is cold, what does that suggest about the actual sea water flow rate through the coolers? • What might have happened to the original pump that would require you to verify its condition before deciding which pump(s) to keep in service? • How could a controlled change in which pump is on line, combined with watching discharge pressure, help you tell whether the first pump is working properly?

✅ Before You Answer

• Confirm whether adding a second pump in parallel will actually increase flow if the first pump is not operating correctly • Think about what a drop or rise in discharge pressure tells you about which pump is doing the work • Consider whether any venting or securing steps are needed if the first pump may be air-bound or otherwise not pumping effectively

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