Which of the following conditions could...

Question 1 / 270705eccefa3bacbc34ba4d47c2a

Question 1 of 270705eccefa3bacbc34ba4d47c2a

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?

Question 1 of 27070

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?

🔍 Key Concepts

• Net positive suction head (NPSH) and how temperature affects water vaporization at the pump suction • Effect of a recirculating (bypass) line on actual suction flow to the pump • Relationship between suction head pressure and pump ability to maintain prime (suction)

💭 Think About

• Which choice would reduce the effective pressure or flow at the pump suction so that the pump could lose its prime? • How does increasing water temperature affect the likelihood of flashing to steam at low pressure areas like the pump eye? • What happens to suction conditions if too much of the pumped water is being sent back to the tank instead of forward to the boiler?

✅ Before You Answer

• Verify which conditions reduce NPSH available to the pump, making cavitation or loss of suction more likely • Check which options increase rather than decrease suction head or help pump operation, so they can be ruled out • Consider whether each option would make the pump more likely to draw in vapor/air instead of solid water at its suction

Question 1 of 27070

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?

Increased suction head pressure

Decreased feedwater temperature

Pump recirculating line being open too much

Excessive feedwater temperature

Question 1 / 270705eccefa3bacbc34ba4d47c2a

Question 1 of 270705eccefa3bacbc34ba4d47c2a

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?

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Question 1 of 27070

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?