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[单选题]
离心泵运行时,压力表指示值应当在量程的()之间。
A.1/4~1/3
B.1/3~1/2
C.1/3~2/3
D.1/2~3/4
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A.1/4~1/3
B.1/3~1/2
C.1/3~2/3
D.1/2~3/4
离心泵运行时,压力表指示值应在量程的()之间。
A.1/4-1/3
B.1/3-1/2
C.1/3-2/3
D.1/2-3/4
A.立即停泵-查清原因-关闭出口阀
B.立即停泵-查清原因-排除故障
C.立即停泵-排除故障
D.立即停泵-关闭出口阀
根据测量要求综合考虑准确度等级及量程,对压力表应保证被测参数示值出现在量程的()处。
A.2/3~3/4
B.1/2~2/3
C.1/3以下