問題詳情
20. The valve has a bulbous body, housing a valve seat and screw downplug or disc arrange at right angles to the axis of the pipe. Whatkind of valves is above description?
(A) Gate valve
(B) Globe valve
(C) Butterfly valve
(D) Check valve
參考答案
答案：B
難度：適中0.656863
統計：A(11),B(67),C(15),D(6),E(0)