CMI Mold Biology & Ecology 3

Question 1

Why are mold spores particularly hazardous to building occupants with respiratory sensitivities?

Accepted Answer

Their microscopic size allows them to penetrate deep into lung tissue

Answer

Their large size physically clogs respiratory passages

Answer

Their chemical composition is always toxic regardless of species

Answer

Their color directly indicates the level of health risk they pose

Question 2

What are the toxic secondary metabolites produced by certain mold species under specific environmental conditions called?

Accepted Answer

Mycotoxins

Answer

Hyphins

Answer

Endotoxins

Answer

Beta-glucans

Question 3

Which mold species is most commonly associated with invasive aspergillosis in immunocompromised patients?

Accepted Answer

Aspergillus fumigatus

Answer

Cladosporium herbarum

Answer

Alternaria alternata

Answer

Penicillium chrysogenum

Question 4

What does a significantly elevated indoor-to-outdoor mold spore count ratio typically indicate during an air quality inspection?

Accepted Answer

Possible active mold growth occurring inside the building

Answer

Normal seasonal variation in background spore levels

Answer

Highly effective HVAC filtration removing all outdoor spores

Answer

Recent renovation activity releasing stored dust

Question 5

What moisture content level in wood is generally considered the threshold above which mold growth risk becomes significant?

Accepted Answer

Above 19%

Answer

Above 35%

Answer

Above 50%

Answer

Above 75%

Question 6

Which surface sampling method uses an adhesive to collect mold spores directly from a surface for microscopic identification?

Accepted Answer

Tape lift sampling

Answer

Bulk sampling

Answer

Wipe sampling

Answer

Impaction air sampling

Question 7

What does the presence of Chaetomium species on a building material typically indicate to a mold inspector?

Accepted Answer

Chronic or long-term water damage due to its requirement for sustained wet cellulose

Answer

Good air quality because Chaetomium is a harmless environmental saprophyte

Answer

Recent latex paint application on interior wall surfaces

Answer

Outdoor contamination from landscaping near the building