CPR Infrared Thermography 3

Question 1

In the IICRC S500 framework, how is infrared thermography best classified as a moisture detection tool?

Accepted Answer

A non-invasive screening tool that guides placement of invasive moisture meters

Answer

Per IICRC guidelines, IR thermography is a complementary non-invasive screening method that identifies suspect areas requiring confirmation with contact or penetrating moisture meters.

Question 2

Which factor can cause a FALSE negative reading when scanning for moisture with an IR camera?

Accepted Answer

Thermal equilibrium between wet and dry areas

Answer

When wet and dry areas reach the same surface temperature (thermal equilibrium), the IR camera cannot detect a contrast difference, producing a false negative.

Question 3

What is the primary spectral range (in micrometers) of thermal IR cameras used in building inspections?

Accepted Answer

8–14 µm

Answer

Building inspection cameras typically operate in the 8–14 µm long-wave infrared (LWIR) band, where room-temperature objects emit most of their thermal radiation.

Question 4

When imaging a wall cavity suspected of hidden mold growth, a thermographer observes an unexpectedly cool rectangular patch. The MOST likely explanation is:

Accepted Answer

Residual moisture from a prior water intrusion event

Answer

A cool rectangular patch on a wall is a classic signature of retained moisture from a previous water intrusion, even if the surface appears visually dry.

Question 5

The term 'NETD' in IR camera specifications stands for:

Accepted Answer

Noise Equivalent Temperature Difference

Answer

NETD (Noise Equivalent Temperature Difference) measures the smallest temperature difference a camera can detect above its own electronic noise floor, expressed in millikelvins (mK).

(CPR) Certified Professional Restorer Practice Test

(CPR) Certified Professional Restorer Practice Test

CPR Infrared Thermography 3