問題詳情
39.What is the main function of labyrinth packing in a steam turbine engine?
(A)To improve dynamic balance
(B)To increase critical speed
(C)To reduce vibration
(D)To minimize leakage of working fluid
參考答案
答案：D
難度：適中0.526316
統計：A(14),B(25),C(19),D(70),E(0)