Daily Quizzes: Many Rewards (November 19–November 21)

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This post was last edited by Benbenxuan on 2011-11-23 08:12. 1. The impeller blades in centrifugal pumps are mostly of ( ) design. A. Backward curved B. Forward curved C. Vertical. 2. The inlet water temperature of hot water boilers should be (). (A) The higher, the better. (B) Above the smoke dew point. (C) Below the smoke dew point. 3. In the turbine protection system, it is required that the automatic shutdown time of the main steam valve be less than ( ) seconds. A. 0.1 B. 0.5 C. 1. Please hide your replies; editing after posting is not valid! Those with different views 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 answers; 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 answers are not hidden). The answers are: ABB