Backflow Prevention Practice Exam

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What is the primary purpose of a backflow preventer?

To increase water pressure
To block contaminants from entering the water supply
To measure flow rate
To regulate temperature of water

The correct answer is: To block contaminants from entering the water supply

The primary purpose of a backflow preventer is to block contaminants from entering the water supply. Backflow prevention devices are critical for maintaining the safety and purity of drinking water by ensuring that non-potable water, which can contain harmful substances and bacteria, cannot flow back into the potable water system. This protection is essential to prevent health hazards that can arise from contamination, such as waterborne diseases. By effectively creating a barrier against potential contamination sources, backflow preventers play a crucial role in safeguarding public health and ensuring reliable access to clean water.