对管道及其附件的严密性进行水压试验时,试验压力应等于管道工作时的压力。
参考答案:错
解析:对管道及其附件的严密性进行水压试验时,试验压力应等于管道工作时压力的1.25倍。
My brother a test next month. He's revising for it now. [ ]
A. has
B. is having
C. is going to have
D. are having
下列爆炸原理与其它三种不同的是
A.锅炉爆炸
B.粉尘爆炸
C.天然气爆炸
D.液化石油气爆炸