單項選擇題

Distilled water from an evaporator may be discharged into a potable water tank （）.

A.through a detachable hose connection
B.after passing through an activated charcoal filter
C.after chemical analysis shows it is fit for consumption
D.through a solenoid operated three-way valve

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單項選擇題

If a centrifugal pump vibrates and is noisy when operating, the cause could be （）.

A.worn gland sealing shaft
B.worn wearing rings
C.a bent shaft
D.reversed pump coupling

單項選擇題

Which of the devices listed is common to all types of pumps?（）

A.A power end and fluid end
B.A propeller and educator
C.A volute and impeller
D.A turbine and piston

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Distilled water from an evaporator may be discharged into a potable water tank （）.

你可能感興趣的試題

If a centrifugal pump vibrates and is noisy when operating, the cause could be （）.

Which of the devices listed is common to all types of pumps?（）