【Daily Question: Pump Equipment】Multiple-choice Question, April 24, 2019

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This post was last edited by 3983596_FPPZ on 2019-4-24 09:39. For bk12.jpg: Rules for multiple-choice questions: 1. If all answers to a question are incorrect, participants will receive a reward of 2 wealth points； 2. A reward of 5 wealth points is given for partially correct answers ； A reward of 8 wealth for all correct answers ； 3. Rewards for answers are available once per person only ； 4. Each reply allows for only one management rating ； 5. The answer and explanation will be visible after responding ； 6. The reply reward is valid for 48 hours. Studying* and winning awards again; come by here every day. 1. Vertical tubular bag pumps are often used in applications where the net positive suction head is low. The main reason for this is ( ). A The pump has high efficiency. B The pump has a low net positive suction head. C The pump has multiple stages. D The pump has a high head. 2. Before starting a centrifugal pump with a high head and high power, the on-site operator should keep a distance from all locations except for the following ( ), in order to avoid danger. A. The plane in which the coupling rotates B. The plane of the seal surface on the pump outlet flange C. The motor start/stop switch D. The cable connecting the motor Answer: 1, B ； 2、C