問題詳情

38.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:簡單0.705882
統計:A(11),B(12),C(72),D(5),E(0)

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