North Carolina Home Inspector Practice Exam

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What is the typical purpose of a drip leg in a gas pipe?

To reduce pressure
To collect moisture
To trap gas
To connect pipes

The correct answer is: To collect moisture

The correct understanding of the typical purpose of a drip leg in a gas pipe system is that it is designed to collect moisture. Drip legs are installed in gas piping to prevent any water or condensate that may accumulate from flowing downstream into the appliances or use points. This is crucial because moisture can lead to corrosion, reduced efficiency, and malfunctioning of gas appliances, which could pose safety hazards. By ensuring that accumulated moisture is contained and can be drained away, the drip leg helps maintain the integrity and efficiency of the gas system. It's notable that while there are functions related to pipe connections and pressure management, these are not the primary purpose of a drip leg. The focus remains on moisture control, which is essential for the safe operation of gas lines.