問題詳情
12. Alltanks 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：簡單0.714286
統計：A(15),B(4),C(1),D(1),E(0)