【Daily Question: Pump Equipment】Multiple-choice Question 2018.11.24

Thread Content

This post was last edited by 3983596_FPPZ on 2018-11-24 09:19. For bk06.jpg: Rules for multiple-choice questions: 1. If the answer to each question is incorrect, participants will still receive a reward of 2 Wealth points； 2. A correct answer rewards 6 wealth points ； 3. Rewards for answers are available once per person only ； 4. Each reply allows for only one management rating ； 5. The answer and its explanation will be visible after responding ； 6. The reward is valid for 48 hours. Winning awards and keeping learning* – come by here every day. The efficiency of a centrifugal pump is 65%. Which of the following statements is correct? (Multiple choice) A. An efficiency of 65% means that the medium receives 65% of the shaft power. B. An efficiency of 65% means that 35% of the shaft power is lost. C. An efficiency of 65% means that the medium receives 65% of the motor power. D. An efficiency of 65% means that 35% of the motor power is lost. The answers are A and B. Key concepts: the definition of efficiency, and the difference between shaft power and motor power. The efficiency of a pump refers to the percentage ratio of useful power to shaft power; see https://bbs.hcbbs.com/thread-2134922-1-1.html