【Pump Technology Edition: Daily Question】April 15, 2020 (A random member who answers correctly before the answers are released will be rewarded with 10 wealth points)

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This post was last edited by Xiu Pump’s Xiaoxixi on 2020-4-17 at 19:54. For centrifugal pumps with a rotational speed within the range of 1800–4500 revolutions per minute, the vibration level at the bearings during operation should not exceed ().   A. 0.15mm B. 0.05mm C. 0.10mm The answer to question 164 dated April 14, 2020 is B. For a toothed coupling with an outer diameter of 250mm, the end face clearance of its tooth sleeve is generally not less than (〕.   A、2mm B、2.5mm C、5mm (The answer will be revealed the day before it’s announced; those who guess correctly before the announcement will have a few lucky forum members randomly selected to receive 10 wealth points each, while those who get it right after the announcement will receive 5 wealth points. Knowledge is priceless – what matters is participation.) I’ve been a bit busy lately, so I’m slower at posting questions and providing feedback with scores, but no matter how busy or late it gets, I will still post and respond to everyone. For the development of the forum and for your own progress as a forum member, please give me your support. Thank you very much, and I also thank my friends who have supported me throughout this journey – thanks to you all.