![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
回收冷媒时低压阀连接上压力表,当回收表压压力低于()后立即关闭低压阀芯并整机断电
A.0.5MPa
B.0. 05MPa
C.0.01MPa
D.0.1MPa
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、0. 05MPa
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.0.5MPa
B.0. 05MPa
C.0.01MPa
D.0.1MPa
B、0. 05MPa
A.系统未预留排空冷媒,采用冷媒排空易导致系统制冷制热效果差,排空的冷媒若正好遇到火源会引起燃烧
B.让系统混入空气提高制冷制热效果
C.空气不可被压缩,不抽真空可能导致压缩机爆炸
D.抽完真空保完负压后不能直接卸下压力表,需稍微扭开高压阀芯少许,表压上升约0.1MPa时关阀芯,以避免空气进入系统
A.35
B.38
C.18
D.15