問題詳情

34.Which type of valve could permit a higher pressure source to supply a lower-pressure service, withan automatic response to changes in demand?
(A)Pressure-reducing valve
(B)Relief valve
(C)Check valve
(D)Safety valve

參考答案

答案:A
難度:適中0.586538
統計:A(61),B(19),C(17),D(5),E(0)

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