Nate Core Practice Test 2025 – Comprehensive Exam Prep

Question: 1 / 400

How does a heat pump function in heating mode?

By generating additional heat with electric coils

By drawing heat from indoors and releasing it outside

By reversing the refrigeration cycle to extract heat from outside air

A heat pump functions in heating mode by reversing the refrigeration cycle to extract heat from outside air. This process involves the heat pump absorbing heat from the outdoor environment, even when temperatures are low, and transferring that heat indoors to warm up a space.

To accomplish this, the heat pump uses a refrigerant, which circulates through the system. As the refrigerant passes through the outdoor coil, it absorbs heat and evaporates into a gas. This gas is then compressed, raising its temperature, before it moves into the indoor coil. In the indoor coil, the refrigerant releases the heat into the indoor air, thus warming the space. Finally, the refrigerant turns back into a liquid and returns to the outdoor coil to absorb more heat, continuing the cycle.

This method is highly efficient since it moves heat rather than generating it from electrical energy, making it a cost-effective option for heating.

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By compressing air and releasing it into the ducts

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