IICRC S500 Water Mitigation
Exam Study Guide – Practice
Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
The homeowner - Answer✔✔ -is responsible to take the necessary steps to
preserve and protect their property from further damage
Four principles of water damage restoration: - Answer✔✔ -Provide for health
and safety of workers and occupants; Document everything; Mitigate, and Dry
Four principles of drying - Answer✔✔ -Extract, Evaporate, dehumidify, control
temp
,Extraction - Answer✔✔ -is removing excess water and is the first step in
mitigation
Evaporation - Answer✔✔ -is achieved by using energy (heat) to transform water
trapped in porous materials into a vapor, thereby releasing the moisture from
the materials.
Dehumidification - Answer✔✔ -the process of removing water vapor from the
air.
Rate of Dehumidification - Answer✔✔ -must be at least equal to the rate of
evaporation.
True or False - Answer✔✔ -Elevated vapor pressure in a room Can cause
secondary damage to hygroscopic materials
True or False - Answer✔✔ -The control of temperature is important to enhance
both evaporation and dehumidification for effective drying
True or False - Answer✔✔ -When temperature increases evaporation of
absorbed water increases and water vapor suspended in air also increases.
, Classification of Water Intrusion - Answer✔✔ -described as Class 1, 2, 3, or 4.
Must be determined to calculate the amount of dehumidification required in
drying process, based on the amount of wet surface area, permeance/porosity
of materials in drying area.
Class 1 - Answer✔✔ -is the least amount of water absorption and evaporation
load, affecting less 5% of porous materials with minimal absorption into low
evaporation materials.
Class 2 - Answer✔✔ -has a significant amount of water absorption and
evaporation load, affection 5-40% porous materials, with minimal absorption
into low evaporated materials
Class 3 - Answer✔✔ -has the greatest amount of water absorption and
evaporation load, affecting more than 40% porous materials and minimal
absorption into low evaporated materials
Class 4 - Answer✔✔ -has deeply held or bound water, and significant absorption
into low evaporation materials.
Determine the Class of water for a 20' x 20' x 8 ' room, with an entirely wet
floor.. - Answer✔✔ -Affected area/Total SF = % affected
400/1440 = .27777 x 100 = 28%
Exam Study Guide – Practice
Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
The homeowner - Answer✔✔ -is responsible to take the necessary steps to
preserve and protect their property from further damage
Four principles of water damage restoration: - Answer✔✔ -Provide for health
and safety of workers and occupants; Document everything; Mitigate, and Dry
Four principles of drying - Answer✔✔ -Extract, Evaporate, dehumidify, control
temp
,Extraction - Answer✔✔ -is removing excess water and is the first step in
mitigation
Evaporation - Answer✔✔ -is achieved by using energy (heat) to transform water
trapped in porous materials into a vapor, thereby releasing the moisture from
the materials.
Dehumidification - Answer✔✔ -the process of removing water vapor from the
air.
Rate of Dehumidification - Answer✔✔ -must be at least equal to the rate of
evaporation.
True or False - Answer✔✔ -Elevated vapor pressure in a room Can cause
secondary damage to hygroscopic materials
True or False - Answer✔✔ -The control of temperature is important to enhance
both evaporation and dehumidification for effective drying
True or False - Answer✔✔ -When temperature increases evaporation of
absorbed water increases and water vapor suspended in air also increases.
, Classification of Water Intrusion - Answer✔✔ -described as Class 1, 2, 3, or 4.
Must be determined to calculate the amount of dehumidification required in
drying process, based on the amount of wet surface area, permeance/porosity
of materials in drying area.
Class 1 - Answer✔✔ -is the least amount of water absorption and evaporation
load, affecting less 5% of porous materials with minimal absorption into low
evaporation materials.
Class 2 - Answer✔✔ -has a significant amount of water absorption and
evaporation load, affection 5-40% porous materials, with minimal absorption
into low evaporated materials
Class 3 - Answer✔✔ -has the greatest amount of water absorption and
evaporation load, affecting more than 40% porous materials and minimal
absorption into low evaporated materials
Class 4 - Answer✔✔ -has deeply held or bound water, and significant absorption
into low evaporation materials.
Determine the Class of water for a 20' x 20' x 8 ' room, with an entirely wet
floor.. - Answer✔✔ -Affected area/Total SF = % affected
400/1440 = .27777 x 100 = 28%
