BOC Level II Written Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of building commissioning in facility
operations?
A. To increase architectural aesthetics
B. To ensure systems operate according to design intent
C. To reduce construction material costs
D. To eliminate all maintenance requirements
B. To ensure systems operate according to design intent
Commissioning verifies and documents that building systems are
designed, installed, tested, and capable of being operated according
to the owner’s requirements and design intent.
2. Which HVAC component is primarily responsible for removing
humidity from air?
A. Heat exchanger
B. Chiller
, C. Dehumidifier coil (cooling coil)
D. Supply fan
C. Dehumidifier coil (cooling coil)
Cooling coils reduce air temperature below its dew point, causing
moisture to condense and be removed from the air stream.
3. What does BAS stand for in building operations?
A. Building Air System
B. Basic Automation Structure
C. Building Automation System
D. Balanced Air Supply
C. Building Automation System
A BAS is an integrated control system that manages HVAC, lighting,
and other building systems for efficiency and performance.
4. Which energy conservation measure reduces peak electrical demand?
A. Increasing lighting levels
B. Demand limiting controls
C. Running chillers continuously
D. Oversizing HVAC equipment
B. Demand limiting controls
Demand limiting reduces peak load by controlling or shedding non-
essential loads during high demand periods.
5. What is the function of an economizer in HVAC systems?
A. Increase refrigerant pressure
, B. Provide free cooling using outdoor air
C. Heat incoming air
D. Remove dust particles
B. Provide free cooling using outdoor air
Economizers use cool outdoor air to reduce mechanical cooling
requirements, improving energy efficiency.
6. Which gas is primarily responsible for ozone depletion in HVAC
refrigerants (legacy systems)?
A. Oxygen
B. Chlorofluorocarbons (CFCs)
C. Nitrogen
D. Carbon dioxide
B. Chlorofluorocarbons (CFCs)
CFCs release chlorine atoms that destroy ozone molecules in the
stratosphere.
7. What is the main purpose of a Variable Frequency Drive (VFD)?
A. Increase water pressure
B. Control motor speed and energy consumption
C. Cool electrical panels
D. Measure airflow
B. Control motor speed and energy consumption
VFDs regulate motor speed based on load requirements, reducing
energy usage in pumps and fans.
, 8. What does COP measure in HVAC systems?
A. Cooling Output Pressure
B. Coefficient of Performance
C. Compressor Operating Power
D. Cooling Operation Percentage
B. Coefficient of Performance
COP measures efficiency by comparing useful heating or cooling
output to energy input.
9. Which system is most responsible for indoor air quality?
A. Electrical system
B. Plumbing system
C. HVAC ventilation system
D. Structural system
C. HVAC ventilation system
Ventilation systems control air exchange, filtration, and pollutant
dilution indoors.
10. What is a key benefit of LED lighting systems?
A. High heat emission
B. Low efficiency
C. Long lifespan and energy efficiency
D. High maintenance requirement
C. Long lifespan and energy efficiency
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of building commissioning in facility
operations?
A. To increase architectural aesthetics
B. To ensure systems operate according to design intent
C. To reduce construction material costs
D. To eliminate all maintenance requirements
B. To ensure systems operate according to design intent
Commissioning verifies and documents that building systems are
designed, installed, tested, and capable of being operated according
to the owner’s requirements and design intent.
2. Which HVAC component is primarily responsible for removing
humidity from air?
A. Heat exchanger
B. Chiller
, C. Dehumidifier coil (cooling coil)
D. Supply fan
C. Dehumidifier coil (cooling coil)
Cooling coils reduce air temperature below its dew point, causing
moisture to condense and be removed from the air stream.
3. What does BAS stand for in building operations?
A. Building Air System
B. Basic Automation Structure
C. Building Automation System
D. Balanced Air Supply
C. Building Automation System
A BAS is an integrated control system that manages HVAC, lighting,
and other building systems for efficiency and performance.
4. Which energy conservation measure reduces peak electrical demand?
A. Increasing lighting levels
B. Demand limiting controls
C. Running chillers continuously
D. Oversizing HVAC equipment
B. Demand limiting controls
Demand limiting reduces peak load by controlling or shedding non-
essential loads during high demand periods.
5. What is the function of an economizer in HVAC systems?
A. Increase refrigerant pressure
, B. Provide free cooling using outdoor air
C. Heat incoming air
D. Remove dust particles
B. Provide free cooling using outdoor air
Economizers use cool outdoor air to reduce mechanical cooling
requirements, improving energy efficiency.
6. Which gas is primarily responsible for ozone depletion in HVAC
refrigerants (legacy systems)?
A. Oxygen
B. Chlorofluorocarbons (CFCs)
C. Nitrogen
D. Carbon dioxide
B. Chlorofluorocarbons (CFCs)
CFCs release chlorine atoms that destroy ozone molecules in the
stratosphere.
7. What is the main purpose of a Variable Frequency Drive (VFD)?
A. Increase water pressure
B. Control motor speed and energy consumption
C. Cool electrical panels
D. Measure airflow
B. Control motor speed and energy consumption
VFDs regulate motor speed based on load requirements, reducing
energy usage in pumps and fans.
, 8. What does COP measure in HVAC systems?
A. Cooling Output Pressure
B. Coefficient of Performance
C. Compressor Operating Power
D. Cooling Operation Percentage
B. Coefficient of Performance
COP measures efficiency by comparing useful heating or cooling
output to energy input.
9. Which system is most responsible for indoor air quality?
A. Electrical system
B. Plumbing system
C. HVAC ventilation system
D. Structural system
C. HVAC ventilation system
Ventilation systems control air exchange, filtration, and pollutant
dilution indoors.
10. What is a key benefit of LED lighting systems?
A. High heat emission
B. Low efficiency
C. Long lifespan and energy efficiency
D. High maintenance requirement
C. Long lifespan and energy efficiency
