ESCO Air Conditioning Practice Exam

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Back seating a two-way service valve results in:

  1. Closed service port with no system flow

  2. Closed service port with normal system flow

  3. Open service port with restricted system flow

  4. Open service port with normal system flow

The correct answer is: Closed service port with no system flow

Back seating a two-way service valve results in a closed service port with no system flow. This means that the valve is fully closed, blocking off any flow through the system. This process effectively shuts off the flow of refrigerant or other fluids, preventing any leakage or unwanted flow. It is essential to understand the function of back seating to properly control system flow and pressure when working with service valves.

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