【Pump Technology Edition: Daily Question】March 30, 2020 (Section benefit: 10 Wealth points as a reward for answering correctly before the answers are revealed)

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149 A hydrodynamic bearing is a sliding bearing that operates under ( ) conditions. A. Semi-dry friction B. Mixed friction C. Pure liquid friction D. Dry friction. The answer to question 148, dated March 29, 2020, is A. The clearance between the crosshead of a piston compressor and its guide rails should be measured using (A), with this clearance needing to be even on both sides. A. Feeler gauge B. Outside diameter micrometer C. Block gauge. (The answer is released the day before it’s 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 I’m slower at posting questions and providing feedback, 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!