3/22/25, 9:29
AM
IICRC S500 WATER MITIGATION EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST RELEASE 2025
Terms in this set (114)
is responsible to take the necessary steps to preserve and protect their property
The homeowner
from further damage
Four principles of water damage Provide for health and safety of workers and occupants; Document everything;
restoration: Mitigate, and Dry
Four principles of drying Extract, Evaporate, dehumidify, control temp
Extraction is removing excess water and is the first step in mitigation
is achieved by using energy (heat) to transform water trapped in porous materials
Evaporation
into a vapor, thereby releasing the moisture from the materials.
Dehumidification the process of removing water vapor from the air.
Rate of Dehumidification must be at least equal to the rate of evaporation.
Elevated vapor pressure in a room Can cause secondary damage to hygroscopic
True or False
materials
The control of temperature is important to enhance both evaporation and
True or False
dehumidification for effective drying
When temperature increases evaporation of absorbed water increases and water
True or False
vapor suspended in air also increases.
described as Class 1, 2, 3, or 4. Must be determined to calculate the amount of
Classification of Water Intrusion dehumidification required in drying process, based on the amount of wet surface
area, permeance/porosity of materials in drying area.
is the least amount of water absorption and evaporation load, affecting less 5% of
Class 1
porous materials with minimal absorption into low evaporation materials.
has a significant amount of water absorption and evaporation load, affection 5-40%
Class 2
porous materials, with minimal absorption into low evaporated materials
has the greatest amount of water absorption and evaporation load, affecting more
Class 3
than 40% porous materials and minimal absorption into low evaporated materials
has deeply held or bound water, and significant absorption into low evaporation
Class 4
materials.
Affected area/Total SF = % affected
Determine the Class of water for a 20' x
400/1440 = .27777 x 100 = 28%
20' x 8 ' room, with an entirely wet
28% = Class 2
floor..
Determine the Class of Water for a 20' x Affected area/total sf = % affected
20' x 8' room, with only half the floor 200/1440 = .13888 x 100 = 14%
affected and arriving within 24 hours of 14% = Class 2
loss.
Determine Class of water for a 20' x 20' x affected area/total sf = % affected
8' room, with entirely wet plywood Class 4 due to deeply bound water sitting for long time
subfloor arriving 48 hours after loss
there are four categories - determined by range of contamination of the source and
Categories of Water
quality of water
1/
5
, 3/22/25, 9:29
AM
Water originating from sanitary water source, with no deterioration, does not pose
Category 1 water
risk to skin or if ingested
Water containing significant contamination from materials, unsafe levels of
Category 2 Water
microorganisms, causes discomfort or sickness.
Category 3 Water Water grossly contaminated with pathogens, toxins, bacteria, causes sickness
the last category of water, without number designation, requiring a specialized
Regulated or Hazardous Material and Mold
environmental expert (EIP) to assist where government regulations apply.
Is the standard of care for the water damage restoration industry, providing
The ANSI/IICRC S500
foundation for basic principles of proper restoration practices.
When the ANSI/IICRC S500 uses the word it is something mandatory due to laws/regulations
"Shall" it means
When the ANSI/IICRC S500 uses the word it is something that is mandatory but not due to laws
"Should" it means
When the ANSI/IICRC S500 uses the word it is something that is advised or suggested to do
"Recommended" it means
the study of the relationship between air, humidity, temperature and their effects on
Psychrometry
various materials
A hygroscopic material will continue to absorb water or water vapor until it reaches
True or False
equilibrium with the surrounding environment
Hot goes to cold, high goes to low, Equilibrium
wet goes to dry refer to what
Some molds to protect themselves, Mycotoxins
produce what
When mold is discovered, air movers.... Should NOT be used at all
When a pre-existing condition is found Document and notify all interested parties
during inspection of water loss what should
techs do...
How should you dispose of Waste water In a sanitary sewer system
What is the best method to contain Extraction
migrating water
What is the tool of choice for extracting Light Wand
water from glued down carpet
An example of a Stationary tool is Water Claw
Thorough extractions decreases what drying time
The easiest extractions would occur on 24 oz carpet over 4 lb pad
what kind of material
What is the best way to check the Pull back carpet and squeeze the pad
efficiency of extraction
The process of removing moisture from the Dehumidification
air is called
Refrigerant dehus work under the principle Condensation
of what
Refrigerant dehus work best between what 70-90 degrees
temperature
2/
5
AM
IICRC S500 WATER MITIGATION EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST RELEASE 2025
Terms in this set (114)
is responsible to take the necessary steps to preserve and protect their property
The homeowner
from further damage
Four principles of water damage Provide for health and safety of workers and occupants; Document everything;
restoration: Mitigate, and Dry
Four principles of drying Extract, Evaporate, dehumidify, control temp
Extraction is removing excess water and is the first step in mitigation
is achieved by using energy (heat) to transform water trapped in porous materials
Evaporation
into a vapor, thereby releasing the moisture from the materials.
Dehumidification the process of removing water vapor from the air.
Rate of Dehumidification must be at least equal to the rate of evaporation.
Elevated vapor pressure in a room Can cause secondary damage to hygroscopic
True or False
materials
The control of temperature is important to enhance both evaporation and
True or False
dehumidification for effective drying
When temperature increases evaporation of absorbed water increases and water
True or False
vapor suspended in air also increases.
described as Class 1, 2, 3, or 4. Must be determined to calculate the amount of
Classification of Water Intrusion dehumidification required in drying process, based on the amount of wet surface
area, permeance/porosity of materials in drying area.
is the least amount of water absorption and evaporation load, affecting less 5% of
Class 1
porous materials with minimal absorption into low evaporation materials.
has a significant amount of water absorption and evaporation load, affection 5-40%
Class 2
porous materials, with minimal absorption into low evaporated materials
has the greatest amount of water absorption and evaporation load, affecting more
Class 3
than 40% porous materials and minimal absorption into low evaporated materials
has deeply held or bound water, and significant absorption into low evaporation
Class 4
materials.
Affected area/Total SF = % affected
Determine the Class of water for a 20' x
400/1440 = .27777 x 100 = 28%
20' x 8 ' room, with an entirely wet
28% = Class 2
floor..
Determine the Class of Water for a 20' x Affected area/total sf = % affected
20' x 8' room, with only half the floor 200/1440 = .13888 x 100 = 14%
affected and arriving within 24 hours of 14% = Class 2
loss.
Determine Class of water for a 20' x 20' x affected area/total sf = % affected
8' room, with entirely wet plywood Class 4 due to deeply bound water sitting for long time
subfloor arriving 48 hours after loss
there are four categories - determined by range of contamination of the source and
Categories of Water
quality of water
1/
5
, 3/22/25, 9:29
AM
Water originating from sanitary water source, with no deterioration, does not pose
Category 1 water
risk to skin or if ingested
Water containing significant contamination from materials, unsafe levels of
Category 2 Water
microorganisms, causes discomfort or sickness.
Category 3 Water Water grossly contaminated with pathogens, toxins, bacteria, causes sickness
the last category of water, without number designation, requiring a specialized
Regulated or Hazardous Material and Mold
environmental expert (EIP) to assist where government regulations apply.
Is the standard of care for the water damage restoration industry, providing
The ANSI/IICRC S500
foundation for basic principles of proper restoration practices.
When the ANSI/IICRC S500 uses the word it is something mandatory due to laws/regulations
"Shall" it means
When the ANSI/IICRC S500 uses the word it is something that is mandatory but not due to laws
"Should" it means
When the ANSI/IICRC S500 uses the word it is something that is advised or suggested to do
"Recommended" it means
the study of the relationship between air, humidity, temperature and their effects on
Psychrometry
various materials
A hygroscopic material will continue to absorb water or water vapor until it reaches
True or False
equilibrium with the surrounding environment
Hot goes to cold, high goes to low, Equilibrium
wet goes to dry refer to what
Some molds to protect themselves, Mycotoxins
produce what
When mold is discovered, air movers.... Should NOT be used at all
When a pre-existing condition is found Document and notify all interested parties
during inspection of water loss what should
techs do...
How should you dispose of Waste water In a sanitary sewer system
What is the best method to contain Extraction
migrating water
What is the tool of choice for extracting Light Wand
water from glued down carpet
An example of a Stationary tool is Water Claw
Thorough extractions decreases what drying time
The easiest extractions would occur on 24 oz carpet over 4 lb pad
what kind of material
What is the best way to check the Pull back carpet and squeeze the pad
efficiency of extraction
The process of removing moisture from the Dehumidification
air is called
Refrigerant dehus work under the principle Condensation
of what
Refrigerant dehus work best between what 70-90 degrees
temperature
2/
5
