GEORGIA INDOOR AIR QUALITY INSPECTOR
EXAM QUESTIONS AND CORRECT ANSWERS
1. Which of the following is the most common indoor air pollutant in
residential buildings?
a. Carbon monoxide
b. Radon
c. Volatile organic compounds
d. Asbestos
c. Volatile organic compounds
VOCs are emitted from paints, cleaning supplies, and building materials and
are the most common indoor air pollutants.
2. What is the primary source of carbon monoxide indoors?
a. Mold
b. Gas appliances
c. Pesticides
d. Dust
b. Gas appliances
Incomplete combustion of fuels from gas stoves, heaters, and furnaces is the
main source of indoor CO.
3. Which type of ventilation is most effective for reducing indoor
pollutants?
a. Natural ventilation
b. Mechanical ventilation
c. Passive ventilation
d. None of the above
b. Mechanical ventilation
Mechanical ventilation systems can control airflow and effectively reduce
indoor air pollutants.
, 4. Which of the following is a health effect commonly associated with
exposure to mold?
a. Memory loss
b. Allergic reactions
c. Skin cancer
d. Hypertension
b. Allergic reactions
Mold spores can trigger allergic reactions, asthma, and respiratory irritation.
5. Radon gas is:
a. Easily detected by smell
b. A radioactive gas
c. Harmless in small amounts
d. Only found in urban areas
b. A radioactive gas
Radon is a naturally occurring radioactive gas that can accumulate indoors,
especially in basements.
6. The best method to test for radon levels in a home is:
a. Visual inspection
b. Short-term or long-term radon testing kits
c. Air flow measurement
d. Mold sampling
b. Short-term or long-term radon testing kits
Radon cannot be seen or smelled, so testing kits are the reliable way to measure
its concentration.
7. What is the main purpose of an air exchange rate measurement?
a. Determine energy efficiency
b. Assess ventilation effectiveness
c. Identify chemical pollutants
d. Detect moisture
, b. Assess ventilation effectiveness
Air exchange rate measures how often indoor air is replaced with outdoor air,
which is key to maintaining good IAQ.
8. Which of the following is considered an occupational exposure limit
for formaldehyde?
a. 0.75 ppm
b. 5 ppm
c. 10 ppm
d. 50 ppm
a. 0.75 ppm
OSHA sets the permissible exposure limit (PEL) for formaldehyde at 0.75 ppm
over an 8-hour workday.
9. Which particle size is most associated with respiratory health risks
indoors?
a. >10 µm
b. 2.5–10 µm
c. <2.5 µm
d. >100 µm
c. <2.5 µm
Fine particles (PM2.5) can penetrate deep into the lungs, causing respiratory
and cardiovascular health problems.
10. Which of the following can contribute to elevated indoor
humidity?
a. Air conditioning
b. Poor ventilation
c. Dehumidifiers
d. Low outdoor humidity
b. Poor ventilation
Inadequate ventilation traps moisture indoors, leading to high humidity and
potential mold growth.
EXAM QUESTIONS AND CORRECT ANSWERS
1. Which of the following is the most common indoor air pollutant in
residential buildings?
a. Carbon monoxide
b. Radon
c. Volatile organic compounds
d. Asbestos
c. Volatile organic compounds
VOCs are emitted from paints, cleaning supplies, and building materials and
are the most common indoor air pollutants.
2. What is the primary source of carbon monoxide indoors?
a. Mold
b. Gas appliances
c. Pesticides
d. Dust
b. Gas appliances
Incomplete combustion of fuels from gas stoves, heaters, and furnaces is the
main source of indoor CO.
3. Which type of ventilation is most effective for reducing indoor
pollutants?
a. Natural ventilation
b. Mechanical ventilation
c. Passive ventilation
d. None of the above
b. Mechanical ventilation
Mechanical ventilation systems can control airflow and effectively reduce
indoor air pollutants.
, 4. Which of the following is a health effect commonly associated with
exposure to mold?
a. Memory loss
b. Allergic reactions
c. Skin cancer
d. Hypertension
b. Allergic reactions
Mold spores can trigger allergic reactions, asthma, and respiratory irritation.
5. Radon gas is:
a. Easily detected by smell
b. A radioactive gas
c. Harmless in small amounts
d. Only found in urban areas
b. A radioactive gas
Radon is a naturally occurring radioactive gas that can accumulate indoors,
especially in basements.
6. The best method to test for radon levels in a home is:
a. Visual inspection
b. Short-term or long-term radon testing kits
c. Air flow measurement
d. Mold sampling
b. Short-term or long-term radon testing kits
Radon cannot be seen or smelled, so testing kits are the reliable way to measure
its concentration.
7. What is the main purpose of an air exchange rate measurement?
a. Determine energy efficiency
b. Assess ventilation effectiveness
c. Identify chemical pollutants
d. Detect moisture
, b. Assess ventilation effectiveness
Air exchange rate measures how often indoor air is replaced with outdoor air,
which is key to maintaining good IAQ.
8. Which of the following is considered an occupational exposure limit
for formaldehyde?
a. 0.75 ppm
b. 5 ppm
c. 10 ppm
d. 50 ppm
a. 0.75 ppm
OSHA sets the permissible exposure limit (PEL) for formaldehyde at 0.75 ppm
over an 8-hour workday.
9. Which particle size is most associated with respiratory health risks
indoors?
a. >10 µm
b. 2.5–10 µm
c. <2.5 µm
d. >100 µm
c. <2.5 µm
Fine particles (PM2.5) can penetrate deep into the lungs, causing respiratory
and cardiovascular health problems.
10. Which of the following can contribute to elevated indoor
humidity?
a. Air conditioning
b. Poor ventilation
c. Dehumidifiers
d. Low outdoor humidity
b. Poor ventilation
Inadequate ventilation traps moisture indoors, leading to high humidity and
potential mold growth.
