Intro to HVAC Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

Intro to HVAC Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What tool is used to measure air temperature? Thermometer. What tool measures air pressure in duct systems? Manometer. What is static pressure in HVAC systems? Resistance to airflow in ducts. What does a return air duct do? Brings air back to the HVAC unit. What does a supply air duct do? Delivers conditioned air to rooms. What is zoning in HVAC systems? Dividing a building into separate temperature-controlled areas. What component opens and closes airflow in zoning systems? 2 Dampers. What is the purpose of ductwork? To distribute conditioned air throughout a building. What unit is commonly used to measure cooling capacity? BTU. What does BTU stand for? British Thermal Unit. What part of the refrigeration cycle releases heat outdoors? The condenser. What component compresses refrigerant vapor? The compressor. What is the role of the evaporator coil? To absorb heat from indoor air. What device controls refrigerant flow into the evaporator? The expansion valve. 3 What type of filter removes dust and debris from air? Air filter. What happens if an air filter is clogged? Reduced airflow and system efficiency. What is the main purpose of ventilation? To bring in fresh air and remove stale air. What type of heating system uses electric resistance? Electric furnace. What safety device prevents furnace overheating? Limit switch. What is a common fuel used in residential furnaces? Natural gas. What does SEER measure? Cooling efficiency. 4 What does SEER stand for? Seasonal Energy Efficiency Ratio. What does AFUE measure? Heating efficiency. What does HVAC stand for? Heating, Ventilation, and Air Conditioning. What is the main purpose of an HVAC system? To control indoor temperature, humidity, and air quality. What component produces heat in a gas furnace? The heat exchanger. What is the function of a thermostat? To sense temperature and control system operation. What type of HVAC system provides both heating and cooling using electricity? A heat pump. What refrigerant function absorbs heat