单项选择题

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

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

点击查看答案&解析

上一题目录下一题

单项选择题

A.centrifugal
B.plunger
C.injector
D.water

单项选择题

A.discharges into a gradually widening channel
B.has stationary diffuser vanes
C.produces no kinetic energy
D.All of the above are true

单项选择题

A.Piston pump
B.Screw pump
C.Diffuser pump
D.Water-ring pump