問題詳情
31. All tanks should be provided with a means of determining the liquid level. What devices are generally installed for this purpose even when a tank liquid-level indicating system is provided?
(A) Sounding tubes
(B) Overflow tubes
(C) Vent tubes
(D) Stripping pipes
參考答案
答案：A
難度：適中0.548387
統計：A(17),B(4),C(2),D(6),E(0)