【Weekly 3 Questions, Question 10】2017.8.31

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bg9.png (Single-choice question) If the structure of the throttling device does not meet the standard requirements, the flow coefficient in the basic flow formula will change. Indicate under which of the following circumstances the flow coefficient will decrease. ( ) A. The right-angled inlet edge of the orifice plate is not sharp. B. The thickness of the orifice plate exceeds the specified value. C. The length of the cylindrical portion with the orifice is too large. D. In the corner connection pressure measurement method, the distance between the pressure-taking hole and the end face of the orifice plate is too great. B —————————————————————————————————————————————————————————————— The validity period for this question is one week; no scoring will be given after that time, and the answer will be displayed automatically thereafter. The deadline is 207.09.08. Scoring criteria: 2 Wealth points for incorrect answers; 3–6 points for *incomplete* correct answers; 8 Wealth points for correct answers accompanied by a detailed explanation; 10–15 Wealth points for correct answers with additional *supplementary* information. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have no relation to the answer are all considered malicious spamming; points will start to be deducted after three warnings.