Core heating, ventilation, and air conditioning system components and safety concepts for entry-level HVAC certification.
42 cards · basic cards · AI-written, checked twice. Edit anything.
- What device compresses refrigerant gas in an air conditioning system?
- The compressor
- Where does the refrigerant release heat in a cooling system?
- In the condenser
- What is the function of an evaporator coil?
- To absorb heat from the indoor air and cool it
- What is the expansion device in a refrigeration system?
- A device that reduces refrigerant pressure and temperature before the evaporator
- Which side of an AC system is the high-pressure side?
- From the compressor discharge through the condenser and to the metering device
- Which side of an AC system is the low-pressure side?
- From the expansion device through the evaporator and back to the compressor inlet
- What is superheat in an HVAC system?
- The temperature rise of refrigerant vapor above its saturation temperature
- What is subcooling in an HVAC system?
- The temperature drop of refrigerant liquid below its saturation temperature
- What is the primary function of a filter drier?
- To remove moisture and contaminants from refrigerant
- What does an accumulator do in an HVAC system?
- It stores excess liquid refrigerant and prevents liquid from entering the compressor
- What is the purpose of a receiver tank?
- To store liquid refrigerant and ensure an adequate supply to the metering device
- What is a sight glass used for?
- To visually observe the state of refrigerant, typically to detect bubbles indicating low charge
- What does EPA Section 608 certification require?
- Technicians must be certified to safely handle, recover, and dispose of refrigerants
- What is R-410A commonly used for?
- Modern air conditioning systems as a replacement for R-22
- Why is R-22 being phased out?
- It contains chlorine that damages the ozone layer