Free BOC HVAC Systems and Controls Questions and Answers — Questions and Answers
Question 1: What is the primary function of an HVAC system?
- Enhance lighting efficiency
- Improve electrical conductivity
- Control temperature, humidity, and air quality (Correct answer)
- Supply potable water
Correct answer: Control temperature, humidity, and air quality
HVAC systems regulate heating, ventilation, and air conditioning to maintain indoor comfort and air quality.
Question 2: Which component is responsible for moving air through a duct system?
- Compressor
- Evaporator
- Blower fan (Correct answer)
- Thermostat
Correct answer: Blower fan
Fans or blowers circulate air through HVAC systems to distribute conditioned air throughout a building.
Question 3: What is the role of a thermostat in HVAC systems?
- Measure humidity only
- Supply refrigerant
- Regulate temperature by controlling the system (Correct answer)
- Control water pressure
Correct answer: Regulate temperature by controlling the system
Thermostats sense room temperature and signal HVAC equipment to turn on or off to maintain desired conditions.
Question 4: Which type of HVAC system allows individual control of different building zones?
- Centralized system
- Split system
- Packaged unit
- Zoned system (Correct answer)
Correct answer: Zoned system
Zoned HVAC systems divide spaces into areas that can be controlled independently, increasing energy efficiency and comfort.
Question 5: What does a Variable Air Volume (VAV) system do?
- Fix airflow regardless of demand
- Maintain air pressure without cooling
- Vary airflow based on space requirements (Correct answer)
- Compress refrigerant only
Correct answer: Vary airflow based on space requirements
VAV systems adjust the amount of air delivered to spaces based on cooling or heating needs, improving efficiency.
Question 6: Which maintenance task improves HVAC system efficiency?
- Disabling the thermostat
- Overloading the system
- Replacing air filters regularly (Correct answer)
- Closing all air vents
Correct answer: Replacing air filters regularly
Replacing air filters removes accumulated dust and debris, improving airflow and energy efficiency.
Free BOC HVAC Systems and Controls Questions and Answers
What is the primary function of an HVAC system?