問題詳情
39.For a reaction type of steam turbine, which device is used to counteract the sizable axialforce generated in the moving blades?
(A)Rotating counter balance weight
(B)Dummy piston
(C)Throttle governor
(D)Labyrinth packing
參考答案
答案：B
難度：適中0.555556
統計：A(7),B(30),C(11),D(5),E(0)