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BOMI Air Handling, Water Treatment & Plumbing Systems Practice Exam (100 Questions)
Based on the BOMI International course curriculum and verified exam content, the following
100 practice questions cover all major topic areas: Human Comfort, Ductwork, Air-Handling
Units, Fans, Indoor Air Quality, Water Treatment, Plumbing Systems, and Fire Protection.
Section 1: Human Comfort & Heat Transfer (Questions 1–15)
1. The rate of exchange of fresh air for returned air in an air-conditioning system is
primarily based on what factor?
A. Building square footage
B. Number of building occupants
C. Outside temperature
D. Type of HVAC equipment
Answer: B
2. All of the following are methods of heat transfer EXCEPT:
A. Radiation
B. Convection
C. Reduction
D. Conduction
Answer: C
3. Which heat load source is most likely to affect all zones of a building?
A. Office equipment
B. Lighting equipment
C. People
D. Solar radiation
Answer: B
4. To compensate for heat gain from office equipment in modern office buildings, air-
conditioning systems have been designed to offset how many watts per square foot?
A. 0.5 to 1 watt
B. 1 to 3 watts
C. 4 to 6 watts
D. 7 to 10 watts
Answer: B
5. The leftover heat in a building from the day before that must be removed when the air-
conditioning system is restarted is called:
A. Sensible heat
B. Latent load
C. Pull-down load
,2
D. Residual heat
Answer: C
6. What exists when the temperature and relative humidity of a person's environment
permit the person to lose metabolic heat at the same rate he or she produces it?
A. Thermal equilibrium
B. Thermal comfort
C. Heat balance
D. Environmental neutrality
Answer: B
7. How is sensible heat measured?
A. Wet-bulb thermometer
B. Dry-bulb thermometer
C. Hygrometer
D. Psychrometer
Answer: B
8. What type of heat is released or used during a change of state between solid, liquid, and
gas?
A. Sensible heat
B. Latent heat
C. Specific heat
D. Radiant heat
Answer: B
9. Boyle's law states that at constant temperature, as the volume increases, the pressure:
A. Increases
B. Decreases
C. Remains constant
D. Doubles
Answer: B
10. Does moist air have more or less density than dry air?
A. More density
B. Less density
C. Same density
D. Density depends on temperature only
Answer: B
11. What is the atmospheric pressure of air at sea level?
A. 10.5 psi
B. 12.2 psi
C. 14.7 psi
, 3
D. 16.8 psi
Answer: C
12. How can the problem of air and water vapor infiltration into a building be solved?
A. Increase exhaust fans
B. Introduce ventilation air at a slight positive pressure
C. Seal all windows permanently
D. Reduce HVAC run time
Answer: B
13. What are the four main categories of internal heat loads in a building?
A. People, lighting, equipment, and system
B. Windows, doors, walls, and roof
C. Solar, wind, rain, and snow
D. Heating, cooling, ventilation, and exhaust
Answer: A
14. What happens to the rate of heat transfer if the difference in temperature increases?
A. The rate of heat transfer increases
B. The rate of heat transfer decreases
C. The rate of heat transfer stays the same
D. The rate of heat transfer stops
Answer: A
15. Charles' law explains that gases:
A. Expand when heated and contract when cooled
B. Contract when heated and expand when cooled
C. Maintain constant volume regardless of temperature
D. Only change pressure, not volume
Answer: A
Section 2: Ductwork & Air Distribution (Questions 16–35)
16. What is a problem with using fibrous glass wool as ductwork material?
A. It is too expensive for most applications
B. It requires specialized installation tools
C. The World Health Organization has declared it carcinogenic to humans
D. It has poor thermal insulation properties
Answer: C
17. This type of duct is used in low-pressure and low-velocity duct systems and has high
friction:
A. Galvanized steel duct
B. Aluminum duct
BOMI Air Handling, Water Treatment & Plumbing Systems Practice Exam (100 Questions)
Based on the BOMI International course curriculum and verified exam content, the following
100 practice questions cover all major topic areas: Human Comfort, Ductwork, Air-Handling
Units, Fans, Indoor Air Quality, Water Treatment, Plumbing Systems, and Fire Protection.
Section 1: Human Comfort & Heat Transfer (Questions 1–15)
1. The rate of exchange of fresh air for returned air in an air-conditioning system is
primarily based on what factor?
A. Building square footage
B. Number of building occupants
C. Outside temperature
D. Type of HVAC equipment
Answer: B
2. All of the following are methods of heat transfer EXCEPT:
A. Radiation
B. Convection
C. Reduction
D. Conduction
Answer: C
3. Which heat load source is most likely to affect all zones of a building?
A. Office equipment
B. Lighting equipment
C. People
D. Solar radiation
Answer: B
4. To compensate for heat gain from office equipment in modern office buildings, air-
conditioning systems have been designed to offset how many watts per square foot?
A. 0.5 to 1 watt
B. 1 to 3 watts
C. 4 to 6 watts
D. 7 to 10 watts
Answer: B
5. The leftover heat in a building from the day before that must be removed when the air-
conditioning system is restarted is called:
A. Sensible heat
B. Latent load
C. Pull-down load
,2
D. Residual heat
Answer: C
6. What exists when the temperature and relative humidity of a person's environment
permit the person to lose metabolic heat at the same rate he or she produces it?
A. Thermal equilibrium
B. Thermal comfort
C. Heat balance
D. Environmental neutrality
Answer: B
7. How is sensible heat measured?
A. Wet-bulb thermometer
B. Dry-bulb thermometer
C. Hygrometer
D. Psychrometer
Answer: B
8. What type of heat is released or used during a change of state between solid, liquid, and
gas?
A. Sensible heat
B. Latent heat
C. Specific heat
D. Radiant heat
Answer: B
9. Boyle's law states that at constant temperature, as the volume increases, the pressure:
A. Increases
B. Decreases
C. Remains constant
D. Doubles
Answer: B
10. Does moist air have more or less density than dry air?
A. More density
B. Less density
C. Same density
D. Density depends on temperature only
Answer: B
11. What is the atmospheric pressure of air at sea level?
A. 10.5 psi
B. 12.2 psi
C. 14.7 psi
, 3
D. 16.8 psi
Answer: C
12. How can the problem of air and water vapor infiltration into a building be solved?
A. Increase exhaust fans
B. Introduce ventilation air at a slight positive pressure
C. Seal all windows permanently
D. Reduce HVAC run time
Answer: B
13. What are the four main categories of internal heat loads in a building?
A. People, lighting, equipment, and system
B. Windows, doors, walls, and roof
C. Solar, wind, rain, and snow
D. Heating, cooling, ventilation, and exhaust
Answer: A
14. What happens to the rate of heat transfer if the difference in temperature increases?
A. The rate of heat transfer increases
B. The rate of heat transfer decreases
C. The rate of heat transfer stays the same
D. The rate of heat transfer stops
Answer: A
15. Charles' law explains that gases:
A. Expand when heated and contract when cooled
B. Contract when heated and expand when cooled
C. Maintain constant volume regardless of temperature
D. Only change pressure, not volume
Answer: A
Section 2: Ductwork & Air Distribution (Questions 16–35)
16. What is a problem with using fibrous glass wool as ductwork material?
A. It is too expensive for most applications
B. It requires specialized installation tools
C. The World Health Organization has declared it carcinogenic to humans
D. It has poor thermal insulation properties
Answer: C
17. This type of duct is used in low-pressure and low-velocity duct systems and has high
friction:
A. Galvanized steel duct
B. Aluminum duct
