【Pump Technology Edition: Daily Question】March 8, 2020 (Section benefit: 10 Wealth points as a reward for answering correctly before the answers are revealed)

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127. A mechanical seal is considered a high-speed mechanical seal when the average linear velocity at the sealed surface exceeds (  ) m/s. The sealing of high-speed pumps and centrifugal compressors falls under high-speed mechanical seals. A、10 B、30 C、50. The answer on March 7, 2020 is B. 126. The \"Maintenance Safety Regulations\" established by the head office state that a maintenance permit without specified safety measures must be (B) held until such measures are put in place. A. Suspend acceptance; B. Reject acceptance; C. Submit comments. Answer to question 125 on March 6, 2020: A. 125. Metal gaskets and paper gaskets must be flat, without any burrs or folds; they should not be placed unevenly or in multiple layers, as this can affect the (A) of the components. A. Rigidness of the bond B. Integrity of the bond C. Stability of the bond (Answers will be released the day before they are made public; those who get it right before the release receive 10 wealth points, those who get it right after the release receive 5 wealth points, and those who participate receive 3 wealth points.) I’ve been a bit busy lately, so it’s taking some time to post questions and provide feedback on answers. But no matter how busy or late it gets, I will still post questions and respond to everyone. Thank you all for your continued support!