CPR Water, Fire & Mold Restoration Techniques 3

Question 1

What is the target indoor relative humidity range recommended by IICRC S500 to inhibit mold growth during water damage restoration?

Accepted Answer

30–50%

Answer

IICRC S500 recommends maintaining indoor relative humidity between 30–50% during restoration to inhibit mold growth and support structural drying.

Question 2

Which type of smoke residue is most difficult to clean and typically requires chemical sponges and specialized solvents?

Accepted Answer

Wet smoke residue from slow-burning, low-heat fires

Answer

Wet smoke residue from slow, smoldering fires is sticky, smeary, and has a strong odor, making it the most difficult to clean and requiring specialized products.

Question 3

During a large-loss water restoration project, a psychrometric calculation shows the Specific Humidity (SH) inside is higher than outside. What is the correct action?

Accepted Answer

Seal the structure tightly and run dehumidifiers

Answer

When indoor SH exceeds outdoor SH, introducing outside air would add moisture to the structure, so the building should be sealed and dehumidification should be relied upon.

Question 4

What is the primary health concern associated with Stachybotrys chartarum (black mold)?

Accepted Answer

It produces mycotoxins that can cause serious respiratory and neurological effects

Answer

Stachybotrys chartarum can produce trichothecene mycotoxins associated with serious respiratory illness, immune suppression, and neurological symptoms in exposed individuals.

Question 5

A technician is restoring fire-damaged kitchen cabinets. Protein smoke residue is present. Which cleaning method is MOST appropriate?

Accepted Answer

HEPA vacuum followed by enzymatic cleaner

Answer

Protein residue requires enzymatic or alkaline cleaners to break down the protein compounds; vacuuming first removes loose deposits before wet cleaning.

(CPR) Certified Priority Restoration Practice Test

(CPR) Certified Priority Restoration Practice Test

CPR Water, Fire & Mold Restoration Techniques 3