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

HVAC Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the primary function of an HVAC system? To control indoor temperature, humidity, and air quality. What does HVAC stand for? Heating, Ventilation, and Air Conditioning. What component of an air conditioner absorbs heat from indoor air? The evaporator coil. What component releases heat to the outdoor air in a cooling system? The condenser coil. What type of refrigerant change occurs in the evaporator coil? Liquid to vapor. What type of refrigerant change occurs in the condenser coil? Vapor to liquid. What device increases refrigerant pressure in a cooling system? 2 The compressor. What HVAC component controls refrigerant flow into the evaporator? The expansion valve. What is the purpose of ventilation in HVAC systems? To supply fresh air and remove contaminants. What unit is commonly used to measure cooling capacity? BTU. What does BTU stand for? British Thermal Unit. What is the main purpose of a thermostat? To regulate system operation based on temperature. What type of thermostat allows programmable schedules? Programmable thermostat. What is the function of an air filter? To remove dust and particles from air. 3 What happens if an air filter is clogged? Reduced airflow and system efficiency. What type of system provides both heating and cooling using electricity? Heat pump. What process allows a heat pump to reverse heating and cooling modes? Reversing valve operation. What is the purpose of ductwork in HVAC systems? To distribute conditioned air. What is a common material used for residential ductwork? Galvanized steel. What is static pressure in HVAC systems? Resistance to airflow in ducts. What tool measures air temperature in HVAC diagnostics? Thermometer. 4 What tool is used to measure refrigerant pressure? Manifold gauge.