NATE Air Conditioning and Heat Pumps Practice Exam

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Ace your NATE Air Conditioning and Heat Pumps Exam with our quiz. Prepare with detailed questions, hints, and thorough explanations to boost your confidence and guide your study journey. Get ready for success in your HVAC certification!

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Which terminal designation on the thermostat subbase typically is used for the cooling circuit?

  1. G

  2. R

  3. W

  4. Y

The correct answer is: Y

The terminal designation that is typically used for the cooling circuit on the thermostat subbase is represented by Y. In HVAC systems, the Y terminal connects to the compressor in the air conditioning system, activating the cooling function when the thermostat calls for cooling. By energizing the Y terminal, the thermostat signals the system to turn on the compressor and circulate refrigerant to provide cooling to the space. The other terminal designations have specific roles: R usually denotes the power supply from the transformer to the thermostat, W is used for the heating circuit (typically for a furnace), and G controls the fan operation. Understanding these designations is critical for troubleshooting and installation of HVAC systems, as they indicate how components communicate and operate within the system.

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