MRS Mold Remediation Techniques and Procedures 4

Question 1

What is the correct air exchange rate recommendation for a negative air machine in a remediation containment zone?

Accepted Answer

4-6 air changes per hour

Answer

Negative air machines should provide 4-6 air changes per hour within the containment zone to maintain effective negative pressure and air quality.

Question 2

When using dry ice blasting for mold remediation on structural lumber, what is a key advantage over conventional methods?

Accepted Answer

It kills mold spores with sub-zero temperatures on contact and leaves no secondary waste

Answer

Dry ice blasting removes mold from structural wood without adding moisture and the dry ice sublimates, leaving no secondary waste to clean up.

Question 3

A remediator discovers mold behind a wall cavity during initial demolition that is significantly larger than initially assessed. What is the correct course of action?

Accepted Answer

Stop work, expand containment, reassess scope, and notify the client before proceeding

Answer

Work must stop when scope significantly changes; containment must be expanded, the new scope assessed, and the client notified before continuing.

Question 4

Which type of air sampling method collects mold spores on a culture medium to identify viable (living) mold?

Accepted Answer

Impaction sampling onto an agar plate (viable culture)

Answer

Viable culture sampling using impaction onto agar plates collects living mold spores that can be cultured and identified, unlike spore trap methods that capture all spores.

Question 5

What is the recommended approach for remediating mold on concrete block walls in a basement?

Accepted Answer

Wire brush, HEPA vacuum, apply biocide, allow to dry, then encapsulate if needed

Answer

Concrete block requires mechanical scrubbing with a wire brush, HEPA vacuuming, biocide application, thorough drying, and encapsulation for severely affected areas.

(MRS) Mold Remediation Specialist Practice Test

(MRS) Mold Remediation Specialist Practice Test

MRS Mold Remediation Techniques and Procedures 4