What are the two ways to operate a main drainage pump?

The correct choice highlights the two operational modes of a main drainage pump, which are local operation and remote operation through a Management Control and Monitoring System (MCMS).

Local operation typically encompasses controls that are directly on-site, allowing on-the-spot adjustments and management by personnel present at the pump's location. On the other hand, remote operation through MCMS offers the advantage of controlling the pump from a distance, which can increase operational efficiency by allowing users to monitor and adjust the pump's activity without needing to be physically present. This flexibility is essential in situations where quick responses are necessary or when the pump is located in a challenging environment.

Operating a main drainage pump through both methods ensures redundancy and reliability in drainage management, making it crucial for facilities that require constant monitoring and operation of their pumping systems.