Cross Connection Practice Exam

Which of the following statements about backflow preventers is true?

1. They can be installed anywhere

2. They require regular testing and maintenance

3. They are only needed for industrial systems

4. Installation does not require permits

The correct answer is: They require regular testing and maintenance

Backflow preventers are crucial devices in maintaining the integrity of water systems, preventing contamination caused by backflow, which can occur when there is a drop in pressure in the supply line. Regular testing and maintenance of backflow preventers are essential for ensuring their effectiveness. Over time, components can wear out or become obstructed, which may hinder their ability to function properly. Testing usually involves checking the device for leaks and ensuring it shuts off correctly, while maintenance might include cleaning or replacing parts. Other statements about backflow preventers, while partially true, lack the comprehensive safety perspective that regular testing and maintenance provide. For example, while the installation of backflow preventers does require permits to ensure compliance with local codes and standards, they cannot be installed just anywhere; the placement must adhere to certain regulations. Furthermore, backflow preventers are not restricted to industrial systems; they are also needed in residential and commercial applications to protect public health. Thus, the necessity for regular testing and maintenance is a true statement that ensures the continued safe operation of the device.