單項(xiàng)選擇題

If a centrifugal pump were continually operated with the discharge valve closed, the （）.

A.motor controller overload would open
B.pump would eventually overheat
C.relief valve would continuously cycle open
D.motor would overheat

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單項(xiàng)選擇題

A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.

A.have a greater head capacity
B.operate with increased impeller efficiency
C.discharge through the suction side of the pump casing
D.require more power to run the shaft

單項(xiàng)選擇題

Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.

A.hydraulic fluid contamination
B.excessive fluid friction
C.turbulent fluid flow
D.fluid pressure surges

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If a centrifugal pump were continually operated with the discharge valve closed, the （）.

你可能感興趣的試題

A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.

Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.