Select TWO practical actions that need to be done to a pumping system if more water is needed to be pumped. Assume that initially you have only one pump available.

Question $2$Select one or more:

A$.$

Replace the pump with a pump having larger diameter impellers.

B$.$

Operate the pump at its free delivery condition.

C$.$

Replace the pump with a pump having smaller diameter impellers to increase rotational speed of the impellers.

D$.$

Install more additional pumps in series.

E$.$

Install more additional pumps in parallel.