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.弹簧管压力表能制成多种规格,以适应不同不同的测量范围。对于低于1MPa的压力表,采用GvA材料制造。对于高于请MPa的压力表,采用锡磷青铜制造。

2020-02-23View Original

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113.弹簧管压力表能制成多种规格,以适应不同测量范围。对于10MPa以下压力范围的压力表,其弹簧管用()制造。 A、50GvA B、锡磷青铜 C、锡锌青铜 2020年2月22日答案选A112. U形管压力计是一种最简单的液压力计,常用来测定(A)的压力。 A、气体 B、液体  C、固体  (次日公布前一天答案,公布前答对奖励10财富,公布后答对奖励5财富,参与奖励3财富) 最近有点忙,发题和回复评分有点慢,但是再忙再晚我也会发,也会回复大家,感谢大家一直支持!
Reply #22020-02-23
B 原理:压力表的弹簧管作为“神经中枢”式的感压元件,其灵敏度与材质有着非常密切的关系。制造弹簧管的材质越软,灵敏度越高。压力表的弹簧管一般选锡磷青铜来制造(在被测压力低于10MPa时);当被测压力高于10MPa时,用钢材制造,对于测量腐蚀性介质的压力表弹簧管,则用不锈钢来制造。

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