【Pump Technology Edition: Daily Question】February 23, 2020 (Section perk: 10 Wealth points for those who answer correctly before the answers are revealed)
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113. Bourdon tube pressure gauges can be manufactured in various specifications to suit different measurement ranges. For pressure gauges in the pressure range below 10 MPa, their Bourdon tubes are made of (). A. 50GvA B. Phosphor bronze C. Tin-zinc bronze. The answer on February 22, 2020, is A. 112. A U-tube manometer is the simplest type of hydraulic manometer, and it is commonly used to measure the pressure of (A). A. Gas B. Liquid C. Solid (Answers will be released the day before they are officially announced. Those who guess correctly 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; however, no matter how busy or late it gets, I will still post things and respond to everyone. Thank you all for your continued support!
Principle B: The Bourdon tube of a pressure gauge acts as a pressure-sensing element in the role of a \"neural center,\" and its sensitivity is closely related to the material used. The softer the material used to make the spring tube, the higher its sensitivity. The Bourdon tube of pressure gauges is generally made of phosphor-brass (when the pressure to be measured is below 10 MPa); when the pressure to be measured is above 10 MPa, it is made of steel. For Bourdon tubes in pressure gauges used to measure pressures in corrosive media, stainless steel is used.