【Pump Technology Edition: Daily Question】March 10, 2020 – Section bonus: A reward of 10 wealth points for those who answer correctly before the answers are revealed

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The thickness of the alloy layer in the thin-walled bearing shells of 129 sliding bearings is (    ).   A、1–2 mm B、0.32–1 mm C、Less than 0.5 mm. Answer to question 128 on March 9, 2020: B. 128. In addition to high requirements for installation techniques, high-speed mechanical seals also demand high standards regarding the installation of the machine itself; the shaft’s play should not exceed (B) mm. A、0.15 B、0.3 C、0.5. Answer to question 127 on March 8, 2020: B. 127. A mechanical seal is considered high-speed when the average linear velocity at its sealing surface exceeds (B) m/s. The sealing of high-speed pumps and centrifugal compressors falls under high-speed mechanical seals. A、10 B、30 C、50 (The answers are released the day before they are made public; those who guess correctly before the release receive 10 wealth points, those who guess correctly after the release receive 5 wealth points, and those who participate receive 3 wealth points.) I’ve been a bit busy lately, which means it’s taking some time to post questions and respond to ratings, but no matter how busy or late it gets, I will still post things and reply to everyone. Thank you all for your continued support!