【Daily Question: Pump Equipment】Multiple-choice Question 2018.11.29

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1.jpg Rules for multiple-choice questions: 1. If the answer to each question is incorrect, a reward of 2 wealth points will be given for active participation； 2. A correct answer rewards 6 wealth points ； 3. Rewards for answers are available once per person only ； 4. Each reply allows for one management rating only ； 5. The answer and its explanation will be visible after responding ； 6. The reward is valid for 48 hours. Again, awards for learning! Come by here every day. Regarding the balance of radial forces in the rotor system of centrifugal pumps, which of the following statements are correct? (Multiple choice) A. Double-suction pumps can balance radial forces through their double-suction impellers. B. Pumps with dual volute channels can balance radial forces. C. Multi-stage pumps achieve radial force balance by arranging the impellers symmetrically. D. The radial guide vane structure in the pump’s internal channels can balance radial forces. Answer: BD. Double-suction pumps are a design that enables the balance of axial forces, and similarly, multi-stage pumps achieve axial force balance through symmetrically arranged impellers. Therefore, the answer is BD