Inspection duties that are performed weekly on a lift station include?

• A. Resetting the plc
• B. Calibrating the flow totalizer
• C. Switching out the level controller
• D. Activating the alarm to test the system

Answer: (D)

Weekly lift-station inspections emphasize making sure the alarm system will actually warn operators if something goes wrong. Activating the alarm to test the system is the best choice because it directly verifies the whole alert chain: the sensor or transmitter triggers the control panel, the audible and visual alarms operate, and any remote monitoring or annunciation reaches staff. This test helps uncover wiring faults, blown fuses, stuck relays, or silenced warnings before a real fault occurs. The other tasks are not typically done on a weekly basis: resetting the programmable logic controller is a more involved diagnostic or programming activity; calibrating the flow totalizer is a measurement-adjustment task that isn’t usually required every week; switching out the level controller is a component replacement done only when there’s a failure or an upgrade.