<strong id="s9uoz"></strong>

單項(xiàng)選擇題

A pump is said to have "negative suction head" when the pump is located （）.

A.between the suction and discharge
B.below the liquid supply
C.above the liquid supply
D.any of the above

你可能感興趣的試題

單項(xiàng)選擇題

Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （）
(1) reciprocating
(2) vane
(3) gear

A.（1）only
B.（1）and（2）
C.（1），（2）and（3）
D.（2）and（3）

單項(xiàng)選擇題

Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （）
(1) reciprocating
(2) rotary
(3) centrifugal

A.（1）only
B.（1）and（2）
C.（1），（2）and（3）
D.（2）and（3）

感谢您访问我们的网站，您可能还对以下资源感兴趣：

国产黄色视屏

视频一区二区无码制服师生国产三级香港三级人妇国产码一区二区在线观看国产伦精品一区二区三区免费观看