Sunday, September 18, 2022
问题:燃气供应单位应对燃气用户设施定期进行检查,有哪些规定?...
Thursday, September 22, 2022
问题:采用机械鼓风的用气设备的燃气总管上,宜设置燃气压力下限自动切断阀。...
Thursday, September 22, 2022
Friday, September 23, 2022
Wednesday, September 21, 2022
问题:判断题管网进行停气与降压作业时,应有专人控制压力,管内燃气压力不宜小于300Pa,严禁管内产生负压。A 对B 错...
Thursday, September 7, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:抢修结束后恢复供气,事前()用户,不应在夜间恢复供气,以免发生意外。...
Tuesday, September 20, 2022
Thursday, September 22, 2022
Saturday, September 17, 2022
问题:一般情况下,下列哪种燃气的爆炸下限最低,最容易发生爆炸()...
Thursday, September 22, 2022
问题:抢修工程资料包括:抢修任务书(执行人、批准人、工程草图等)、动火申报批准书、抢修记录、()或鉴定资料、抢修工程质量验收资...
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:在对铸铁管的外观进行检查时,管材管件的()应符合现行国家标准。...
Thursday, September 22, 2022
问题:天然气表压为0.35MPa,小时工况流量为120m/h,问小时标况流量是多少?...
Thursday, September 22, 2022
问题:燃烧器收缩管可增加空气的阻力,一般有流线型和锥形两种。...
Thursday, September 22, 2022
问题:在出现液化石油气大量泄漏时,下列哪些情况容易产生危害()?...
Thursday, September 15, 2022
问题:聚乙烯燃气管道系统应分段进行强度试验,试验管段长度不宜超过()km。...
Tuesday, September 20, 2022
问题:钢管无损探伤产生咬边的主要原因是电弧热量太()。...
Thursday, September 15, 2022