HVAC EPA Certification 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the consequence of leaks in a low-pressure (vacuum) system?

Improved efficiency

Preventive maintenance requirements

Air and moisture entering the system

In a low-pressure (vacuum) system, leaks can lead to air and moisture entering the system. This is critically important because the presence of air and moisture can negatively impact the efficiency and performance of the system.

When air enters the system, it can lead to the formation of non-condensable gases, which can hinder the ability of the refrigerant to absorb heat effectively, resulting in decreased cooling capacity. Additionally, moisture can cause various issues, including the risk of corrosion, ice formation on the evaporator coils, and the potential for chemical reactions that produce acids, which can damage components of the system.

Therefore, recognizing and addressing leaks in a vacuum system is essential to maintain proper functionality and prevent deterioration in performance.

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Increased refrigerant pressure

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