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IICRC Water Damage Restoration Exam
Prep 2025 comprehensive Q&A
How is Class 4 of water loss defined? - correct -answer-Deeply held or bound
water.
Water intrusion that involves a significant amount of water absorption into low
evaporation materials.
What kind of materials would be found in a class four water loss? - correct -
answer-Wet materials with extremely low permeance
What is permeance? - correct -answer-The ability of vapor or water to pass
through a material
When would you recommend the services of a third party evaluator? Who would
this be? - correct -answer-When high risk individuals are working or living in a
water damage environment. Public Health Issues. Microbial Contamination
, 2|Page
An IEP
What does IEP stand for? - correct -answer-Indoor Environmental Professional
What does IAQ stand for? - correct -answer-Indoor Air Quality
Most indoor materials are designed for a normal humidity condition of what? -
correct -answer-30-50%RH
What is psychrometry? - correct -answer-the study of the physical and
thermodynamic properties of gas-vapor mixtures, especially air and water vapor
Why do we use psychometry - correct -answer-We are using the control of
humidity, temperature, and air movement to assist in the drying process.
What 3 components contribute to drying time? - correct -answer-Temperature,
Humidity, Airflow
IICRC Water Damage Restoration Exam
Prep 2025 comprehensive Q&A
How is Class 4 of water loss defined? - correct -answer-Deeply held or bound
water.
Water intrusion that involves a significant amount of water absorption into low
evaporation materials.
What kind of materials would be found in a class four water loss? - correct -
answer-Wet materials with extremely low permeance
What is permeance? - correct -answer-The ability of vapor or water to pass
through a material
When would you recommend the services of a third party evaluator? Who would
this be? - correct -answer-When high risk individuals are working or living in a
water damage environment. Public Health Issues. Microbial Contamination
, 2|Page
An IEP
What does IEP stand for? - correct -answer-Indoor Environmental Professional
What does IAQ stand for? - correct -answer-Indoor Air Quality
Most indoor materials are designed for a normal humidity condition of what? -
correct -answer-30-50%RH
What is psychrometry? - correct -answer-the study of the physical and
thermodynamic properties of gas-vapor mixtures, especially air and water vapor
Why do we use psychometry - correct -answer-We are using the control of
humidity, temperature, and air movement to assist in the drying process.
What 3 components contribute to drying time? - correct -answer-Temperature,
Humidity, Airflow
