Ontario Operator-in-Training (OIT) Practice Exam

What is the primary feature of a septic tank effluent pump system?

1. It relies solely on gravity

2. It is a pressurized system

3. It operates without any pumps

4. It uses anaerobic treatment exclusively

The correct answer is: It is a pressurized system

The primary feature of a septic tank effluent pump system is that it is a pressurized system. In such systems, effluent from the septic tank is pumped under pressure to higher elevation or to areas that gravity drainage alone cannot serve. This capability is essential for ensuring proper distribution of the wastewater to the absorption field or other components of the treatment system, particularly in situations where the topography does not allow for a gravity-fed system. In contrast, other options do not accurately reflect the function of a septic tank effluent pump system. For example, relying solely on gravity would not address situations where the effluent needs to be moved uphill or across significant distances, making a pressurized approach necessary. Operating without any pumps would indicate a system that does not meet certain site conditions, which is contrary to the purpose of an effluent pump system. Lastly, while anaerobic treatment is part of the septic tank process, it cannot be described as the exclusive treatment method since effluent pumping systems also serve to manage and distribute treated effluent effectively.