Cross Connection Practice Exam

What is a primary function of backflow prevention devices?

1. Enhance water taste

2. Prevent pressure loss

3. Ensure accurate metering

4. Protect the potable water supply

The correct answer is: Protect the potable water supply

The primary function of backflow prevention devices is to protect the potable water supply. These devices are specifically designed to prevent contaminated water from flowing back into the clean water system, ensuring that drinking water remains safe and uncontaminated. Backflow can occur due to changes in pressure within the water supply system, which can lead to potential hazards if non-potable substances infiltrate the potable supply. By effectively blocking any reverse flow, backflow prevention devices play a crucial role in maintaining public health and safety, making this the correct emphasis of their functionality. While enhancing water taste, preventing pressure loss, and ensuring accurate metering are important aspects of water system management, they do not directly relate to the core purpose of backflow prevention. The focus of these devices is solely on safeguarding the integrity of the drinking water.