ASCS Indoor Air Quality and Contaminants

Question 1

Which airborne contaminant is commonly found in HVAC systems and can cause respiratory issues?

Accepted Answer

Mold spores

Answer

Mold spores are a common airborne contaminant in HVAC systems and can trigger allergies and respiratory problems.

Question 2

What is the primary source of indoor air pollution in HVAC systems?

Accepted Answer

Dust and debris accumulation

Answer

Dust and debris buildup inside air ducts and filters is a major source of indoor air pollution.

Question 3

Which gas is a common indoor air pollutant and is colorless, odorless, and dangerous at high levels?

Accepted Answer

Carbon monoxide

Answer

Carbon monoxide is a colorless, odorless gas that can accumulate indoors and cause serious health risks.

Question 4

What is the role of an air filter in improving indoor air quality?

Accepted Answer

Trap airborne contaminants

Answer

Air filters trap dust, pollen, and other particles, improving air quality by preventing contaminants from circulating indoors.

Question 5

Which method is most effective in preventing microbial growth in HVAC systems?

Accepted Answer

Controlling moisture levels

Answer

Controlling moisture levels prevents microbial growth by eliminating the conditions needed for mold and bacteria to thrive.

(ASCS) Air Systems Cleaning Specialist Certification Practice Test