单项选择题
The volute of centrifugal pump also acts as a diffuser converting （）into pressure head.
A.mechanical energy
B.heat energy
C.potential energy
D.kinetic head
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相关考题
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单项选择题
A centrifugal impeller consists of a number of vanes curving （） from the direction of rotation.
A.backwards
B.forwards
C.upward
D.downwards -
单项选择题
When installed for bilge pumping or ballast duty, centrifugal pumps require a （） to remove air from the suction pipe.
A.air chamber
B.head lank
C.primer
D.prime mover -
单项选择题
Water enters the rotating impeller through the entry, known as “（）”, at the centre.
A.eye
B.hole
C.balance holes
D.opening
