問題詳情

6. One type of pumps whose volume of a chamber or chambers is alternately increased todraw the liquid in from the suction pipe and then decreased to force the liquid out into the deliverypipe. What type of pumps is not above
(A) Centrifugal pump
(B) Displacement pump
(C) Gear pump
(D) Rotary pump

參考答案

答案:A
難度:適中0.5
統計:A(1),B(0),C(1),D(0),E(0)

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