Environmental Protection Agency (EPA) MVAC Certification

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Study for the EPA MVAC Certification. Dive into key environmental regulations with multiple choice questions, hints, and detailed explanations. Get ready to excel on your exam!

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What is the maximum allowable moisture level in recycled R-12 intended for return to a mobile air-conditioning system?

5 PPM
10 PPM
15 PPM
20 PPM

The correct answer is: 15 PPM

The maximum allowable moisture level in recycled R-12 intended for return to a mobile air-conditioning system is crucial for ensuring the proper functioning and longevity of the system. Moisture in refrigerants can lead to various operational issues, including the formation of acids and other contaminants that can damage components and reduce efficiency. Choosing a maximum moisture level of 15 parts per million (PPM) reflects industry standards aimed at safeguarding against these potential problems. By maintaining moisture at this level, technicians can help prevent corrosion and avoid pressure-related issues within the air-conditioning system. In contrast, lower moisture levels, such as those suggested in the other options, could impose unnecessarily stringent requirements that may not be practical in all situations. It is essential for technicians to understand the balance between maintaining system integrity and adhering to feasible operational practices.