Which of the listed pumping arrangements...

Question 1 / 270705eccef9cbacbc34ba4d45c4d

Question 1 of 270705eccef9cbacbc34ba4d45c4d

Which of the listed pumping arrangements will be hazardous when two similar centrifugal pumps are used to discharge a cargo of flammable liquid?

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Question 1 of 27070

Which of the listed pumping arrangements will be hazardous when two similar centrifugal pumps are used to discharge a cargo of flammable liquid?

🔍 Key Concepts

• Centrifugal pump characteristics when operating in parallel (on a common discharge or suction line) • Effect of different speeds or discharge pressures on flow sharing between pumps • Risks of overheating, vaporization, or friction sparks when pumping flammable liquids

💭 Think About

• Think about what happens if one centrifugal pump develops higher discharge pressure than the other when they share a line. How will the flow in each pump change? • Consider which configuration could cause one pump to be throttled back or even driven in reverse by the other pump, and why that is dangerous with flammable cargo. • Ask yourself: in which setup are the pumps most likely to fight each other instead of sharing the load, creating abnormal flow or dead‑heading conditions?

✅ Before You Answer

• For each option, check whether the pumps are same / different speed and whether they share a common suction or a common discharge line. • Verify which arrangement could lead to one pump operating far off its design curve (very low flow or reverse flow), increasing heat and possible vapor formation in the cargo. • Confirm which scenario is most likely to cause instability or backflow between the pumps instead of smooth, parallel operation.

Question 1 of 27070

Which of the listed pumping arrangements will be hazardous when two similar centrifugal pumps are used to discharge a cargo of flammable liquid?

Both pumps operating at the same speed and taking suction from a common line.

Each pump operating at a different pressure and discharging into a common line.

Each pump operating at a different speed and taking suction from a common line.

Both pumps operating at the same speed and discharging into a common line.

Question 1 / 270705eccef9cbacbc34ba4d45c4d

Question 1 of 270705eccef9cbacbc34ba4d45c4d

Which of the listed pumping arrangements will be hazardous when two similar centrifugal pumps are used to discharge a cargo of flammable liquid?

Back

Question 1 of 27070

Which of the listed pumping arrangements will be hazardous when two similar centrifugal pumps are used to discharge a cargo of flammable liquid?