【Daily Question: Pump Equipment】Multiple-choice Question 2018.11.26

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This post was last edited by 3983596_FPPZ on 2018-11-26 09:38. 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 one management rating only ； 5. The answer and its explanation will be visible after responding ； 6. The reward is valid for 48 hours. He won another award in his studies; come by here every day. The metal flexible diaphragm coupling is a common type of coupling. Which of the following statements is correct? (Single choice) A. The more holes there are on the diaphragm, the better the coupling’s compensatory ability. B. The more holes there are on the diaphragm, the greater the torque that can be transmitted. C. The longer the intermediate section (extension section), the worse the coupling’s compensatory ability. D. Vibration damping by a coupling means that it can eliminate vibrations. Answer: B. The more holes there are, the greater the rigidity of the diaphragm, and thus the worse its compensatory ability; however, the torque that can be transmitted increases. Under the same constraints regarding angular displacement compensation, the longer the intermediate section, the greater the allowable radial error, and the better the coupling’s compensatory ability. A coupling can only absorb and reduce the transmission of vibrations, but it cannot eliminate the source of those vibrations. Therefore, the answer is B