Pest Control Technician Practice Exam

A backflow prevention device is designed primarily to protect the potable water supply from contamination due to backflow, which can occur when there is a drop in water pressure. Its main functions are to ensure that water flows in only one direction and to prevent the reverse flow of potentially contaminated water into the clean water supply. The option regarding filtering insects is not a function of a backflow prevention device. These devices do not have mechanisms to filter out physical contaminants such as insects; their sole purpose is to prevent backflow and thus safeguard the quality of the water. The other options accurately reflect the critical roles of such devices: protecting the potable water supply from contamination, maintaining system integrity, and preventing water from becoming a hazard due to backpressure situations. These aspects highlight the importance of backflow prevention in maintaining safe drinking water standards and ensuring the health of individuals relying on that supply.