【Weekly 3 Questions, Question 27】October 10, 2017

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By answering the question for this issue in bg9.png, you can see the answer to the previous issue. The question for this issue is as follows: (Single-choice question) When it is necessary to measure the flow rate of media that are corrosive, conductive, or contain solid particles, which instrument should generally be used? A. Rotameter B. Venturi meter C. Electromagnetic flowmeter D. Differential pressure flowmeter. The answers for this issue will be announced on October 12, 2017.————————————————————————————————————————————————————————— Answers to the previous issue: (Fill-in-the-blank) When using open-type packing in control valves, the openings of adjacent pieces of packing should be ( ); for V-type packing, when used in vacuum valves, the openings should be ( ). The answers are: 180 degrees or 90 degrees apart, upward.———————————————————————————————————————————————————————— Score criteria: 2 points for an incorrect answer; 3–8 points for an incomplete answer; 10 points for a correct answer, provided there is a detailed explanation; 12–15 points if the answer is correct but lacks sufficient details. Please score according to these criteria. Note: If there are editing records after answering, only 1 point in wealth will be given to the participant. The time limit for answering is before the next question; 2 points are awarded if the answer is correct within two periods after the deadline, while no points are given if the answer is incorrect or if more than two periods pass. Each instance of continuous malicious spamming results in a deduction of 2 wealth points, with no upper limit; only numbers and emojis are allowed. Any random letters entered, unrelated to the answer, are considered malicious spamming. Points will start to be deducted after three warnings