HVAC - EPA Certification Practice Exam

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What is one consequence of using a long hose during refrigerant recovery?

  1. Increased efficiency of recovery

  2. Excessive pressure drop and greater recovery time

  3. Enhanced safety measures

  4. Lower emissions

The correct answer is: Excessive pressure drop and greater recovery time

Using a long hose during refrigerant recovery can lead to excessive pressure drop and greater recovery time. This is primarily because longer hoses introduce additional resistance to the flow of refrigerant, making it more difficult for the refrigerant to travel through the line. As a result, the pressure can decrease significantly, which slows down the recovery process and may even lead to inefficiencies in the recovery system. This option correctly highlights a critical operational consideration in HVAC practices: the impact of hose length on system performance. Shorter hoses are preferred to minimize pressure loss, ensure effective refrigerant recovery, and maintain system efficiency.

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