HVAC - Intro to HVAC - Chapter 1 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

HVAC - Intro to HVAC - Chapter 1 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified Why is regular coil cleaning necessary? To maintain heat transfer efficiency. What is the purpose of a condensate pump? To remove water when gravity drainage is not possible. Why is proper refrigerant piping size critical? To maintain pressure drop and efficient system operation. What is the role of a thermostat anticipator? To prevent overshooting the desired temperature. Why is measuring superheat and subcooling important? To verify proper refrigerant charge. What is the difference between a two-stage and single-stage furnace? A two-stage furnace has high and low heat settings for comfort and efficiency. Why is vibration isolation used in HVAC equipment? 2 To reduce noise and mechanical wear. What is the role of a backflow preventer in hydronic systems? To prevent contaminated water from entering the potable supply. What is a common cause of ice formation on an evaporator coil? Restricted airflow or low refrigerant. Why is refrigerant oil important? To lubricate the compressor and ensure proper operation. What is the purpose of a charge check in an HVAC system? To ensure the refrigerant level is correct for efficient performance. What is the main role of a split-system air conditioner? To separate heat exchange processes between indoor and outdoor units for efficiency. What is the purpose of a flame sensor? To detect ignition and ensure safe furnace operation. Why is duct insulation critical for energy efficiency? To prevent heat loss or gain during distribution. 3 What is the function of a condensate trap? To prevent air from entering the condensate drain system. What is the difference between conduction, convection, and radiation in HVAC? Conduction transfers heat through solids, convection through fluids, and radiation through electromagnetic waves. What is HVAC an abbreviation for? Heating, Ventilation, and Air Conditioning. What is the primary purpose of an HVAC system? To provide comfortable indoor temperature, humidity, and air quality. What is the main difference between heating and cooling systems? Heating adds heat to a space, while cooling removes heat from a space. What does ventilation mean in HVAC? The process of exchanging indoor air with outdoor air to maintain air quality. Why is indoor air quality important? To protect occupant health and comfort. 4 What is the basic function of a thermostat? To control the operation of heating