Daily Quizzes: Many Rewards Await (December 16–December 18)

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1. The greater the net positive suction head, the higher the cavitation resistance of the pump (). (A) The higher. (B) The worse. (C) Irrelevant. 2. When the centrifugal pump is connected to a pipeline, closing the outlet valve will cause the pipeline characteristic curve to ( ). (A) Steepens. (B) Becomes smoother. (C) Remains unchanged. 3. As the altitude increases, the suction vacuum level of the water pump ( ). (A) Decrease. (B) Remains unchanged. (C) Increase. BAA: Please hide your replies; editing after posting is not valid! Those with different opinions on the provided answer keys can post discussions the next day. For multiple accounts under the same IP, only the first response counts as valid. All three questions are multiple-choice questions; 3 points are awarded for each correct answer, and 10 points – worth either Wealth or Charm – are given for answering all three correctly. There is a reward for everyone who participates. Please hide your responses; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Those who provide in-depth explanations and discussions in addition to giving correct answers may receive additional rewards (no extra points will be given if the answers are not hidden)