Building Automation Lesson 5 HVAC
Systems Questions and Answers |
Latest Version | 2025/2026 | Correct &
Verified
What is the primary function of a building automation system (BAS) in HVAC?
✔✔To monitor and control heating, cooling, and ventilation for comfort and efficiency.
What does VAV stand for in HVAC systems?
✔✔Variable Air Volume.
Why are VAV systems used in modern buildings?
✔✔To adjust airflow to different zones according to demand.
What is a DDC controller?
✔✔Direct Digital Controller that automates HVAC equipment control.
What is the purpose of a chiller in an HVAC system?
✔✔To remove heat from water and provide chilled water for cooling.
What does a boiler do in an HVAC system?
✔✔Heats water or steam for distribution to heating systems.
1
,Why is a BAS important for energy management?
✔✔It optimizes equipment operation to reduce energy consumption.
What is a pneumatic control system?
✔✔An older control system that uses compressed air to operate HVAC devices.
Why are sensors critical in a BAS?
✔✔They provide real-time data for monitoring and control of HVAC systems.
What is the role of a temperature sensor in HVAC automation?
✔✔To detect room or duct temperature for system adjustments.
What is a humidity sensor used for in a BAS?
✔✔To monitor and control indoor moisture levels.
What is a CO2 sensor used for in HVAC systems?
✔✔To measure indoor air quality and control ventilation rates.
Why is zone control important in HVAC systems?
✔✔To provide different temperatures to different areas for comfort and efficiency.
What is the function of an actuator in a BAS?
2
, ✔✔To move dampers or valves in response to control signals.
What is the purpose of a variable-frequency drive (VFD) in HVAC?
✔✔To adjust motor speed for fans or pumps based on load demand.
Why is scheduling critical in building automation?
✔✔To operate HVAC equipment only when needed, saving energy.
What is a setpoint in HVAC control?
✔✔The desired temperature, humidity, or pressure the system aims to maintain.
Why is feedback important in a control loop?
✔✔It ensures the system can adjust outputs based on measured conditions.
What is the difference between open-loop and closed-loop control?
✔✔Open-loop operates without feedback; closed-loop uses feedback to maintain conditions.
What is the role of a BAS operator interface?
✔✔Allows users to monitor and adjust system parameters.
Why is real-time monitoring valuable in HVAC automation?
✔✔It detects issues quickly and ensures optimal system performance.
3
Systems Questions and Answers |
Latest Version | 2025/2026 | Correct &
Verified
What is the primary function of a building automation system (BAS) in HVAC?
✔✔To monitor and control heating, cooling, and ventilation for comfort and efficiency.
What does VAV stand for in HVAC systems?
✔✔Variable Air Volume.
Why are VAV systems used in modern buildings?
✔✔To adjust airflow to different zones according to demand.
What is a DDC controller?
✔✔Direct Digital Controller that automates HVAC equipment control.
What is the purpose of a chiller in an HVAC system?
✔✔To remove heat from water and provide chilled water for cooling.
What does a boiler do in an HVAC system?
✔✔Heats water or steam for distribution to heating systems.
1
,Why is a BAS important for energy management?
✔✔It optimizes equipment operation to reduce energy consumption.
What is a pneumatic control system?
✔✔An older control system that uses compressed air to operate HVAC devices.
Why are sensors critical in a BAS?
✔✔They provide real-time data for monitoring and control of HVAC systems.
What is the role of a temperature sensor in HVAC automation?
✔✔To detect room or duct temperature for system adjustments.
What is a humidity sensor used for in a BAS?
✔✔To monitor and control indoor moisture levels.
What is a CO2 sensor used for in HVAC systems?
✔✔To measure indoor air quality and control ventilation rates.
Why is zone control important in HVAC systems?
✔✔To provide different temperatures to different areas for comfort and efficiency.
What is the function of an actuator in a BAS?
2
, ✔✔To move dampers or valves in response to control signals.
What is the purpose of a variable-frequency drive (VFD) in HVAC?
✔✔To adjust motor speed for fans or pumps based on load demand.
Why is scheduling critical in building automation?
✔✔To operate HVAC equipment only when needed, saving energy.
What is a setpoint in HVAC control?
✔✔The desired temperature, humidity, or pressure the system aims to maintain.
Why is feedback important in a control loop?
✔✔It ensures the system can adjust outputs based on measured conditions.
What is the difference between open-loop and closed-loop control?
✔✔Open-loop operates without feedback; closed-loop uses feedback to maintain conditions.
What is the role of a BAS operator interface?
✔✔Allows users to monitor and adjust system parameters.
Why is real-time monitoring valuable in HVAC automation?
✔✔It detects issues quickly and ensures optimal system performance.
3
