【Pump Technology Edition: Daily Question】March 21, 2020 (Section perk: 10 Wealth points for those who answer correctly before the answers are revealed)

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140. For key wear, the (  ) key method is generally used to address it. A. Replace B. Repair C. Grind Answer to question 139 on March 21, 2020: A. 139. The relief valve is used to regulate the pressure in a hydraulic system (A). A. Pressure B. Flow rate C. Direction. Answer to question 138 on March 19, 2020: B. 138. When a flexible rotor operates below its critical speed, the rotor can be considered as (B). A. Flexible rotor B. Rigid rotor C. Elastic rotor (Answers will be released the day before they are made public; those who get the answers right before the release will receive 10 wealth points, those who get them right after the release will receive 5 wealth points, and those who participate will 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!