40. Which phenomenon will take place in a steam turbine when the nozzle-passing frequency
stimulus is coincident with a turbine blade natural frequency?
(A) Surging
(B) Choking
(C) Knocking
(D) Resonance
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統計: A(17), B(15), C(13), D(41), E(0) #1274896
統計: A(17), B(15), C(13), D(41), E(0) #1274896