【Daily Question: Pump Equipment】True or False Question, 2019.6.14

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bk14.jpg Rules for answering questions and management: 1. If all answers to a question are incorrect, participants who engage actively will receive 2 Wealth points; no rewards will be given for responses that are not answers； 2. In the answer section, a correct answer earns 5 wealth points ； 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. The mechanical losses, volumetric losses, and hydraulic losses in a centrifugal pump are collectively referred to as the pump’s overall efficiency ( ) ； 2. At a grid frequency of 60Hz, the synchronous speed of a 2-pole Y-type motor is 3600 r/min ( ). Answer: 1. Incorrect ； 2. Correct.