問題詳情
18. The pump coverts energy (external driving source) into kinetic energy in the fluid bygiving impulses to the fluid by impellers. A diffuser or volute converts most of the kinetic energyinto pressure, i.e. these machines use the basic law (Bernoulli’s) of converting potential energyinto kinetic energy. What pumps are above description?
(A) Rotary pumps
(B) Displacement pumps
(C) Gear pumps
(D) Centrifugal pumps
參考答案
答案：D
難度：適中0.467
書單：沒有書單，新增
用户評論
【Wind】評論
18.泵通過葉輪向流體提供衝動能，將能量(外部的驅動源)轉化為流體中的動能。擴散器或蝸殼式通道將大部分動能轉化為壓力，意即這些機器使用了基本定律（伯努利定律）中的"將位能轉化為動能的"。以上描述的是什麼泵？A.旋轉泵B.排量泵C.齒輪泵D.離心泵