Which type of pump is used when chemicals are to be dosed in water treatment plant?

In an activated sludge process which type of pump is used to recirculate the sludge?

What are the pumps that operate by alternately filling a cavity and then displacing a given volume of liquid called?

Which formula is used to calculate the head for centrifugal pumps?

Which type of pump is used when the effluent should be pumped back into the plant for use as service water?

In a centrifugal pump, the flow is ___ when the viscosity is increased.

What are the pumps with one or more impellers called?

What are the internal dimensions for a sewer of depth less than 0.9 m?