Pest Control Technician Practice Exam 2025 – Complete Prep Guide

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What is the purpose of a back flow prevention device?

To filter airborne contaminants

To stop water from flowing back into the feed water

The purpose of a backflow prevention device is to stop water from flowing back into the feed water supply. This device is crucial in maintaining the integrity of potable water systems by preventing contaminated water from reversing its flow and entering the clean water supply. Such backflow can occur due to changes in pressure in the piping system, which can pose a serious health risk if pollutants infiltrate drinking water.

Additionally, while filtration and separation of systems can play roles in water safety, those functions do not directly address the specific purpose of backflow prevention. The design and implementation of backflow prevention devices ensure that there is a barrier against the backflow of potentially hazardous substances, thereby safeguarding public health and complying with plumbing codes and regulations.

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To provide an air space separating two water systems

To completely eliminate water contamination

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