NATE Air Conditioning and Heat Pumps Practice Exam

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In a heat pump system, which mode is used for heating?

  1. Cooling mode

  2. Heating mode

  3. Both cooling and heating mode

  4. Defrost mode

The correct answer is: Heating mode

In a heat pump system, the heating mode is employed to transfer heat from the outside air (or ground, depending on the type of heat pump) into the building. This process involves reversing the flow of refrigerant within the system, allowing it to absorb heat from the external environment and release it inside the space that needs to be heated. When the heat pump is in heating mode, it effectively raises the indoor temperature by circulating warm air through the ductwork or directly into the living area. Using the heating mode is essential during colder months when heating is required, ensuring efficient operation and comfort in indoor environments.

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