CMA Mold Inspection & Procedures 3

Question 1

Which sampling method is BEST suited for identifying the specific location of mold growth on a surface?

Accepted Answer

Surface tape-lift sampling

Answer

Tape-lift samples collect material directly from a surface, allowing the laboratory to identify mold species and density at a specific location.

Question 2

A homeowner had a roof leak repaired six months ago. During inspection, a CMA finds no visible mold but elevated moisture readings in ceiling drywall. What does this finding suggest?

Accepted Answer

Residual moisture may still support mold growth, requiring further investigation

Answer

Drywall can retain moisture within its core even when surface-dry, and residual moisture above 15–17% can sustain or initiate mold growth.

Question 3

When is it acceptable for a CMA to collect air samples using a spore trap during a mold inspection?

Accepted Answer

After ensuring HVAC systems have been running normally for at least 24 hours

Answer

Normal HVAC operation for 24 hours allows representative air mixing, ensuring that samples reflect typical indoor air quality conditions.

Question 4

A CMA discovers water damage in a crawl space with visible mold covering more than 10 square feet of wood joists. According to IICRC S520 guidelines, this situation requires:

Accepted Answer

A licensed mold remediator to perform work under a separate remediation protocol

Answer

IICRC S520 classifies affected areas over 10 sq ft as Condition 3, requiring professional remediation separate from the assessment function.

Question 5

What does a high spore count of Stachybotrys chartarum in an air sample during a mold inspection typically indicate?

Accepted Answer

Chronic, long-term water intrusion and wet cellulosic materials indoors

Answer

Stachybotrys chartarum requires persistently wet cellulosic materials (paper, wood) to amplify; its presence in air samples indicates chronic indoor moisture problems.

(CMA) Certified Mold Assessor Practice Test

(CMA) Certified Mold Assessor Practice Test

CMA Mold Inspection & Procedures 3