The coolant heat storage system is being discussed. Technician A says that the water valve is driven by an electric motor. Technician B says that the storage tank has its own electric water pump. Which technician is correct?

A and B both

Explanation:

In a Coolant heat storage system the water valves are driven by electric motor that is the water valves are electrically powered for automatic opening and closure.

Moreover, it is also true that Storage tank has its own electric water pump to pump the water out when required.

Hence Both the technicians are correct here