ACAC CIE PRACTICE
EXAM COMPLETE 100
QUESTIONS
Question 1: Occupants in a parking-garage-adjacent o�ce report headache and dizziness that improve after leaving the building. Which contaminant should be treated as the most urgent combustion-related suspect?
Choices:
1) Carbon monoxide 2) Carbon dioxide 3) Radon 4) Formaldehyde
Correct Answer: Carbon monoxide
Explanation: Carbon monoxide is a colorless, odorless combustion gas that can cause headache, dizziness, nausea, confusion, and potentially fatal poisoning. A source connected to vehicle exhaust makes CO an urgent priority.Page 1
Question 2: Which characteristic makes radon a signi�cant indoor environmental concern?
Choices:
1) It is a visible particulate released by carpeting 2) It is a radioactive gas that can enter buildings from soil 3) It is produced mainly by humidi�ers 4) It is a bacterial endotoxin from cooling towers
Correct Answer: It is a radioactive gas that can enter buildings from soil
Explanation: Radon is a naturally occurring radioactive gas produced from uranium decay in soil and rock. It can migrate into buildings through foundation openings and is associated with lung cancer risk.Question 3: A new pressed-wood cabinet installation is followed by eye and throat irritation. Which pollutant is most directly associated with emissions from some composite wood products?
Choices:
1) Nitrogen dioxide 2) Ozone 3) Formaldehyde 4) Radon
Correct Answer: Formaldehyde
Explanation: Formaldehyde can o�-gas from certain pressed-wood and composite wood products, adhesives, and furnishings. Acute exposure can irritate the eyes, nose, and throat.Page 2
Question 4: Which statement best distinguishes a building-related illness from
nonspeci�c sick-building symptoms?
Choices:
1) A building-related illness always a�ects every occupant 2) Sick-building symptoms require a positive microbial culture 3) Sick-building symptoms occur only in naturally ventilated buildings 4) A building-related illness has a clinically identi�able disease or cause associated with building exposure Correct Answer: A building-related illness has a clinically identi�able disease or cause associated with building exposure Explanation: Building-related illness involves a diagnosable condition with a recognizable agent or exposure pathway, whereas sick-building complaints often involve nonspeci�c symptoms without a single con�rmed disease.Question 5: Which indoor source is most strongly associated with nitrogen dioxide exposure in residences?
Choices:
1) Unvented or poorly vented fuel-burning appliances 2) Laser printers using toner 3) Wet gypsum board 4) Fiberglass duct liner
Correct Answer: Unvented or poorly vented fuel-burning appliances
Explanation: Nitrogen dioxide is a combustion product. Gas stoves, kerosene heaters, and other fuel-burning appliances can contribute to indoor NO2 when combustion or venting is inadequate.Page 3