問題詳情
9. It is obviously impossible to regulate the decreasing pressure by a single cock orscrew-down valve, when the steam pressure would decrease because the demand for steamon the varied side. What equipment is above description?
(A) Globe valve
(B) Reducing valve
(C) Quick closing valve
(D) Gate valve
參考答案
答案：B
難度：適中0.587571
統計：A(38),B(104),C(25),D(10),E(0)