HVAC BOMA 501 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS (DETAILED &
ELABORATED) ACTUAL EXAM 2026 TEST 100% SOLVED 2026!!
Question 1
Which of the following describes a Dual Duct System?
A) A system using one duct for both heating and cooling simultaneously.
B) A system where hot and cold air are supplied by separate ducts and mixed at each controlled
space.
C) A system that relies solely on radiant heat to achieve thermal comfort.
D) A system that uses water and air in the same duct to transfer heat.
E) A system that is highly energy-efficient and consumes minimal electricity.
Correct Answer: B) A system where hot and cold air are supplied by separate ducts and
mixed at each controlled space.
Rationale: A Dual Duct system utilizes two separate ducts—one for hot air and one for cold
air. These streams are combined in a mixing box at the terminal end to meet the specific
temperature requirements of the zone. While effective for comfort, it is considered energy-
inefficient because it often requires cooling and heating air simultaneously before mixing it.
Question 2
How is temperature control achieved in a Multizone System?
A) By adjusting the speed of the compressor in response to outdoor air.
B) By mixing hot and cold air at the central unit in response to individual room thermostats.
C) By turning the boiler off and on based on the average building temperature.
D) By varying the flow of refrigerant directly to each room.
E) By changing the humidity levels until the air feels cooler.
Correct Answer: B) By mixing hot and cold air at the central unit in response to individual
room thermostats.
Rationale: In a Multizone system, the mixing of hot and cold air occurs at the main air
handling unit rather than at the terminal boxes in the individual rooms. Dampers at the
unit regulate the proportions of each air stream sent to the various zones.
Question 3
When performing load calculations for a building, which of the following must be considered?
A) Only the sensible heat gain from walls and windows.
B) Only the latent heat gain from occupants.
C) Both the sensible heat and the latent heat.
D) The thermal conductivity (K-value) of the furniture only.
E) The total weight of the HVAC equipment being installed.
Correct Answer: C) Both the sensible heat and the latent heat.
Rationale: Complete load calculations must account for sensible heat (which changes
temperature) and latent heat (which relates to moisture levels). Failure to account for both
can result in an undersized system that cannot control humidity.
, 2
Question 4
Which of the following activities provides a latent heat gain rather than a sensible heat gain?
A) Sunlight shining through a window.
B) Heat generated by overhead LED lighting.
C) Taking a hot bath or cooking a meal.
D) Heat passing through an insulated brick wall.
E) Warm air infiltrating through a cracked door.
Correct Answer: C) Taking a hot bath or cooking a meal.
Rationale: Sensible heat gain refers to a direct rise in temperature. Latent heat gain involves
an increase in the moisture content of the air (humidity). Activities like cooking or bathing
release steam and water vapor, contributing to the latent load.
Question 5
In what ways does solar radiation typically disperse when striking a building?
A) It is only absorbed by the roof and never enters the windows.
B) It is entirely reflected back into the atmosphere by modern glass.
C) It is transmitted directly to the interior, absorbed by glass, and reflected into the building.
D) It converts into water vapor upon contact with the exterior walls.
E) It is neutralized by the building's electrostatic suppression system.
Correct Answer: C) It is transmitted directly to the interior, absorbed by glass, and reflected
into the building.
Rationale: Solar load is complex. A portion of the energy passes through windows
(transmission), some is caught by the glass itself (absorption) and radiated inward, and
some can be reflected by surfaces into other parts of the structure.
Question 6
Outside air can enter conditioned spaces through which of the following methods?
A) Infiltration through walls, swinging doors, and air induced by replaced exhaust.
B) Only through the main fresh air intake on the roof.
C) Via the drainage pipes in the building's plumbing system.
D) Only when the building's pressure is higher than the outside pressure.
E) By passing through the refrigerant lines.
Correct Answer: A) Infiltration through walls, swinging doors, and air induced by replaced
exhaust.
Rationale: Infiltration occurs when outdoor air enters through unintended openings like
cracks in walls or doors. Additionally, if the exhaust system removes more air than is being
supplied, the resulting negative pressure will pull outside air into the space.
Question 7
True or False: In commercial buildings, heat generated by lights does not seriously affect the
control of the heating system.
, 3
A) True
B) False
Correct Answer: B) False
Rationale: In many large commercial buildings, the heat generated by high-intensity
lighting can be so significant that it reduces the need for the heating system to run, even in
cold weather. It is a major component of the "Internal Heat Gain."
Question 8
The human body's feeling of "well-being" or thermal comfort primarily depends on what
physiological factor?
A) The body's metabolism.
B) The speed of the person's hair growth.
C) The specific heat of the person's clothing.
D) The volume of nitrogen in the room.
E) The air velocity within the ductwork.
Correct Answer: A) The body's metabolism.
Rationale: Thermal comfort is the body's ability to maintain an equilibrium where it can
effectively dissipate the heat generated by its own metabolism. Factors like air
temperature, humidity, and air speed influence how well this metabolism is balanced.
Question 9
Which set of natural laws has the greatest bearing on the science of air conditioning and
thermodynamics?
A) Newton's Laws of Motion.
B) Boyle's Law, Charles' Law, and Dalton's Law.
C) Moore's Law and Kepler's Laws.
D) The Laws of Inheritance.
E) The Laws of Gravity and Inertia.
Correct Answer: B) Boyle's Law, Charles' Law, and Dalton's Law.
Rationale: These gas laws describe the relationship between pressure, volume, and
temperature (Boyle/Charles) and the behavior of mixtures of gases and water vapor
(Dalton), which are fundamental to the refrigeration cycle.
Question 10
What is the primary purpose of a "pitch pocket" on a commercial roof?
A) To collect rainwater for the cooling tower.
B) To protect the piping and seal the roof where refrigeration lines pass through it.
C) To provide a storage area for extra roof gravel.
D) To measure the angle of the sun's radiation.
E) To hold the outdoor air temperature sensor.
Correct Answer: B) To protect the piping and seal the roof where refrigeration lines pass
ELABORATED) ACTUAL EXAM 2026 TEST 100% SOLVED 2026!!
Question 1
Which of the following describes a Dual Duct System?
A) A system using one duct for both heating and cooling simultaneously.
B) A system where hot and cold air are supplied by separate ducts and mixed at each controlled
space.
C) A system that relies solely on radiant heat to achieve thermal comfort.
D) A system that uses water and air in the same duct to transfer heat.
E) A system that is highly energy-efficient and consumes minimal electricity.
Correct Answer: B) A system where hot and cold air are supplied by separate ducts and
mixed at each controlled space.
Rationale: A Dual Duct system utilizes two separate ducts—one for hot air and one for cold
air. These streams are combined in a mixing box at the terminal end to meet the specific
temperature requirements of the zone. While effective for comfort, it is considered energy-
inefficient because it often requires cooling and heating air simultaneously before mixing it.
Question 2
How is temperature control achieved in a Multizone System?
A) By adjusting the speed of the compressor in response to outdoor air.
B) By mixing hot and cold air at the central unit in response to individual room thermostats.
C) By turning the boiler off and on based on the average building temperature.
D) By varying the flow of refrigerant directly to each room.
E) By changing the humidity levels until the air feels cooler.
Correct Answer: B) By mixing hot and cold air at the central unit in response to individual
room thermostats.
Rationale: In a Multizone system, the mixing of hot and cold air occurs at the main air
handling unit rather than at the terminal boxes in the individual rooms. Dampers at the
unit regulate the proportions of each air stream sent to the various zones.
Question 3
When performing load calculations for a building, which of the following must be considered?
A) Only the sensible heat gain from walls and windows.
B) Only the latent heat gain from occupants.
C) Both the sensible heat and the latent heat.
D) The thermal conductivity (K-value) of the furniture only.
E) The total weight of the HVAC equipment being installed.
Correct Answer: C) Both the sensible heat and the latent heat.
Rationale: Complete load calculations must account for sensible heat (which changes
temperature) and latent heat (which relates to moisture levels). Failure to account for both
can result in an undersized system that cannot control humidity.
, 2
Question 4
Which of the following activities provides a latent heat gain rather than a sensible heat gain?
A) Sunlight shining through a window.
B) Heat generated by overhead LED lighting.
C) Taking a hot bath or cooking a meal.
D) Heat passing through an insulated brick wall.
E) Warm air infiltrating through a cracked door.
Correct Answer: C) Taking a hot bath or cooking a meal.
Rationale: Sensible heat gain refers to a direct rise in temperature. Latent heat gain involves
an increase in the moisture content of the air (humidity). Activities like cooking or bathing
release steam and water vapor, contributing to the latent load.
Question 5
In what ways does solar radiation typically disperse when striking a building?
A) It is only absorbed by the roof and never enters the windows.
B) It is entirely reflected back into the atmosphere by modern glass.
C) It is transmitted directly to the interior, absorbed by glass, and reflected into the building.
D) It converts into water vapor upon contact with the exterior walls.
E) It is neutralized by the building's electrostatic suppression system.
Correct Answer: C) It is transmitted directly to the interior, absorbed by glass, and reflected
into the building.
Rationale: Solar load is complex. A portion of the energy passes through windows
(transmission), some is caught by the glass itself (absorption) and radiated inward, and
some can be reflected by surfaces into other parts of the structure.
Question 6
Outside air can enter conditioned spaces through which of the following methods?
A) Infiltration through walls, swinging doors, and air induced by replaced exhaust.
B) Only through the main fresh air intake on the roof.
C) Via the drainage pipes in the building's plumbing system.
D) Only when the building's pressure is higher than the outside pressure.
E) By passing through the refrigerant lines.
Correct Answer: A) Infiltration through walls, swinging doors, and air induced by replaced
exhaust.
Rationale: Infiltration occurs when outdoor air enters through unintended openings like
cracks in walls or doors. Additionally, if the exhaust system removes more air than is being
supplied, the resulting negative pressure will pull outside air into the space.
Question 7
True or False: In commercial buildings, heat generated by lights does not seriously affect the
control of the heating system.
, 3
A) True
B) False
Correct Answer: B) False
Rationale: In many large commercial buildings, the heat generated by high-intensity
lighting can be so significant that it reduces the need for the heating system to run, even in
cold weather. It is a major component of the "Internal Heat Gain."
Question 8
The human body's feeling of "well-being" or thermal comfort primarily depends on what
physiological factor?
A) The body's metabolism.
B) The speed of the person's hair growth.
C) The specific heat of the person's clothing.
D) The volume of nitrogen in the room.
E) The air velocity within the ductwork.
Correct Answer: A) The body's metabolism.
Rationale: Thermal comfort is the body's ability to maintain an equilibrium where it can
effectively dissipate the heat generated by its own metabolism. Factors like air
temperature, humidity, and air speed influence how well this metabolism is balanced.
Question 9
Which set of natural laws has the greatest bearing on the science of air conditioning and
thermodynamics?
A) Newton's Laws of Motion.
B) Boyle's Law, Charles' Law, and Dalton's Law.
C) Moore's Law and Kepler's Laws.
D) The Laws of Inheritance.
E) The Laws of Gravity and Inertia.
Correct Answer: B) Boyle's Law, Charles' Law, and Dalton's Law.
Rationale: These gas laws describe the relationship between pressure, volume, and
temperature (Boyle/Charles) and the behavior of mixtures of gases and water vapor
(Dalton), which are fundamental to the refrigeration cycle.
Question 10
What is the primary purpose of a "pitch pocket" on a commercial roof?
A) To collect rainwater for the cooling tower.
B) To protect the piping and seal the roof where refrigeration lines pass through it.
C) To provide a storage area for extra roof gravel.
D) To measure the angle of the sun's radiation.
E) To hold the outdoor air temperature sensor.
Correct Answer: B) To protect the piping and seal the roof where refrigeration lines pass
