CMR Moisture Control & Building Science 2

Question 1

Which instrument is used to measure relative humidity and temperature simultaneously in the field during a mold assessment?

Accepted Answer

Thermo-hygrometer (psychrometer)

Answer

A thermo-hygrometer or psychrometer simultaneously measures ambient temperature and relative humidity, which are both critical data points for evaluating moisture-related mold risk.

Question 2

In a 'stack effect' scenario common in multi-story buildings, how does moisture move?

Accepted Answer

Warm moist air rises and exits at the top while cold air infiltrates at the bottom

Answer

The stack effect causes warm, buoyant air to rise and exit through upper floors and roof, while replacement cold air infiltrates at the lower levels, carrying moisture upward through the building in the process.

Question 3

What is the purpose of a negative air pressure containment during mold remediation from a moisture-control perspective?

Accepted Answer

To prevent mold spores from migrating to unaffected areas and to control indoor humidity

Answer

Negative air pressure containment creates an airflow into the work area, preventing spore-laden and potentially moist air from escaping into clean zones and cross-contaminating unaffected building areas.

Question 4

Efflorescence on a basement wall most directly indicates:

Accepted Answer

Water has been moving through the masonry, depositing salts on the surface

Answer

Efflorescence is the white crystalline deposit left when water carrying dissolved salts migrates through masonry and evaporates at the surface, confirming active or historic water intrusion through the wall.

Question 5

A hygroscopic building material is one that:

Accepted Answer

Absorbs and releases moisture in response to ambient humidity changes

Answer

Hygroscopic materials like wood, gypsum, and cellulose readily absorb water vapor from the air when humidity is high and release it when humidity drops, making them particularly susceptible to mold when sustained moisture is present.

CMR - Certified Mold Remediator Practice Test

CMR - Certified Mold Remediator Practice Test

CMR Moisture Control & Building Science 2