Cross Connection Practice Exam

For which condition may the Pressure Vacuum Breaker Assembly be installed?

1. Direct pressure

2. Backsiphonage; severe hazard

3. Low vacuum conditions

4. Cross connection with chemicals

The correct answer is: Backsiphonage; severe hazard

The Pressure Vacuum Breaker Assembly is specifically designed to prevent backsiphonage, particularly in applications that may involve a severe hazard. This device functions by creating a mechanism that allows air to enter the supply line when negative pressure occurs, which effectively breaks the siphon and prevents contaminated water from flowing back into the clean water supply. In situations where there is a potential for severe contamination, such as from irrigation systems or industrial processes, the Pressure Vacuum Breaker Assembly provides a crucial safeguard. It ensures that if there is a sudden drop in pressure in the system, contaminants do not siphon back into the potable water supply, thus maintaining public health and safety. While the other options may refer to relevant situations in the context of backflow prevention, they do not represent the specific and suitable application of the Pressure Vacuum Breaker Assembly as effectively as the option regarding backsiphonage and severe hazard.