問題詳情

33. Which type of valve should be installed whenever an undesired reversal of flow is possible？
(A) Throttle valve
(B) Stop valve
(C) Check valve
(D) Relief valve

參考答案

答案：C
難度：適中0.548387
統計：A(17),B(12),C(51),D(13),E(0)

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