【Pump Technology Edition: Daily Question】March 2, 2020 (Section benefit: 10 Wealth points as a reward for answering correctly before the answers are revealed)

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121. Surge in centrifugal compressors occurs when the inlet flow rate reaches a certain level; this flow rate is commonly referred to as the compressor’s surge flow rate. A. Increase B. Decrease C. Maintain. Answer to question 120 on March 1, 2020: B. 120. For sliding bearings with moderate speeds, moderate loads, and high temperatures, it is advisable to use (B) as the material for the bearing shells or bushings. A. Gray cast iron B. Cast bronze alloy C. Bearing alloy (Answers will be released the day before they are officially announced; those who get it right before the announcement receive 10 wealth points, those who get it right after the announcement 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 things and respond to everyone. Thank you all for your continued support!