CPR CPR Equipment Selection & Deployment 2

Question 1

A HEPA vacuum is required rather than a standard shop vacuum when:

Accepted Answer

Removing dry mold-contaminated material or lead-dust debris to prevent cross-contamination

Answer

HEPA vacuums capture particles ≥0.3 microns at 99.97% efficiency, preventing mold spores or lead dust from being exhausted back into the air during cleanup.

Question 2

What does GPP (grains per pound) measure in restoration drying?

Accepted Answer

The moisture content of air — specifically, grains of water vapor per pound of dry air

Answer

GPP (grains per pound) is the specific humidity of air, expressing how many grains of water vapor are contained per pound of dry air, used to calculate dehumidifier efficiency.

Question 3

Negative air pressure containment in a mold remediation zone is achieved by:

Accepted Answer

Running an air scrubber/negative air machine exhausted to the outside so pressure inside is lower than surrounding areas

Answer

Exhausting air to the outside with an air scrubber creates negative pressure, ensuring any air leakage flows INTO the containment zone rather than carrying spores out.

Question 4

When selecting a generator for powering restoration equipment on a job site without utility power, the FIRST calculation the restorer must make is:

Accepted Answer

Total running wattage of all equipment plus a 20–25% startup surge buffer

Answer

Motors draw 2–3× their running wattage at startup; the restorer must total running watts and add a surge buffer to avoid tripping the generator under load.

Question 5

A moisture meter reads 16% on a hardwood floor subfloor. The dry standard for that region is 9–11%. This reading indicates:

Accepted Answer

Elevated moisture content; continued drying is needed before reinstalling finished flooring

Answer

Subfloor moisture above the dry standard (typically 9–11% for hardwood substrates) indicates the material is not yet dry and flooring reinstallation would risk warping or mold.

(CPR) Certified Professional Restorer Practice Test

(CPR) Certified Professional Restorer Practice Test

CPR CPR Equipment Selection & Deployment 2