Theoretically, a double suction impeller is...

Question 1 / 270705eccef9bbacbc34ba4d45435

Question 1 of 270705eccef9bbacbc34ba4d45435

Theoretically, a double suction impeller is in hydraulic axial balance. In actuality this balance is rarely achieved due to __________.

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Question 1 of 27070

Theoretically, a double suction impeller is in hydraulic axial balance. In actuality this balance is rarely achieved due to __________.

🔍 Key Concepts

• Double-suction centrifugal pump impellers and how they are designed to balance axial thrust • How flow conditions at each suction eye affect forces on the impeller • The difference between theoretical design balance and real-world operating conditions

💭 Think About

• Think about what must be TRUE at both suction eyes for the impeller to stay in axial balance. What real-world condition could disturb this? • Consider which choices directly change the hydraulic forces on each side of the impeller, and which are more related to mechanical design or sealing arrangements. • Ask yourself: which option would cause one side of the impeller to ‘pull’ harder than the other, even if the impeller was designed to be balanced?

✅ Before You Answer

• Identify which options affect hydraulic flow into the impeller versus those that affect mechanical parts like bearings or stuffing boxes. • Verify which factor would create a difference in pressure or velocity at one suction eye compared to the other. • Eliminate any answer that doesn’t directly change the axial hydraulic thrust on the impeller faces.

Question 1 of 27070

Theoretically, a double suction impeller is in hydraulic axial balance. In actuality this balance is rarely achieved due to __________.

an unbalanced force exerted from the direction of the impeller nearest the driving motor

unequal or non-uniform flow to the suction eyes of the impeller housing

excessive sealing water flow to the stuffing box

flexible shaft design which causes rapid wear of the outboard shaft bearing

Question 1 / 270705eccef9bbacbc34ba4d45435

Question 1 of 270705eccef9bbacbc34ba4d45435

Theoretically, a double suction impeller is in hydraulic axial balance. In actuality this balance is rarely achieved due to __________.

Back

Question 1 of 27070

Theoretically, a double suction impeller is in hydraulic axial balance. In actuality this balance is rarely achieved due to __________.