IICRC WATER DAMAGE RESTORATION
(WRT) CERTIFICATION, IICRC WATER
DAMAGE RESTORATION TECHNICIAN, IICRC
WATER DAMAGE RESTORATION TRAINING
MANUAL EXAM QUESTIONS AND ANSWERS
2026 LATEST
A non-invasive (non-penetrating) _______ ___ tracks the migration of water
below hard finish surfaces, such as under vinyl tile or ceramic tile --CORRECT
ANSWER--Moisture meter
A invasive/ penetrating device to check moisture on carpet and padding. --
CORRECT ANSWER--
_____ air holds MORE moisture than cold air. Air is dryer in winter. --
CORRECT ANSWER--Warm
As the air gets warmer, RELATIVE HUMIDITY is _______.
100% RH in cold climate is DRYER than 50% RH in a warmer climate. --
CORRECT ANSWER--Lowered
____ is the amount of moisture in the air compared to what the air can hold at
that temperature.
Page 1 of 165
,RH is the amount of water vapor (individual water molecules) in a given parcel
of air RELATIVE to the # of water molecules that could be in that particular
parcel of air.. without it reaching dew point (
Air is 78% nitrogen molecules, oxygen and others. Molecules aren't interacting
w/ eachother. Space between them. We can put WATER MOLECULES in that
space.
RH = how many water molecules we are putting in the spaces between the air
molecules.
As air is heated --> molecules move faster --> spread further apart --->
VOLUME INCREASES. More space for more water molecules. --CORRECT
ANSWER--Relative Humidity (RH)
water that originates from a sanatary water source and does not pose substantial
risk.
Examples broken water lines, tub or sink overflows with no contaminants,
appliance malfunctions involving water supply lines, rainwater --CORRECT
ANSWER--Category 1 Water
Page 2 of 165
,1st indicator that it went from category 1 to 2 --> ___ --CORRECT ANSWER--
odor
Water that has a significant degree of chemical, biological and/or physical
containment.
Aquarium leaks, waterbed leaks, toilet bowl overflows (that contain urine),
dishwasher or clothes washer discharge, and water that enters the structure from
hydrostatic pressure.
Has the potential to cause sickness or discomfort and should NOT be allowed to
dwell in a structure for an extended period of time. --CORRECT ANSWER--
Category 2 Water
Water that contains grossly contaminated water and can cause harmful reactions
to humans. Carries PATHOGENIC AGENTS
examples sewage, all forms of flooding seawater, water from river, etc. --
CORRECT ANSWER--Category 3 Water
--CORRECT ANSWER--Special Situations
Originates from a sanitary water source. --CORRECT ANSWER--Category 1
Page 3 of 165
, Contaminated; may cause discomfort or sickness. --CORRECT ANSWER--
Category 2
Grossly contaminated; includes toxins, pathogens. --CORRECT ANSWER--
Category 3
Least amount of water, absorption and evaporation load (less than 5% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 1
Large amount of water, absorption and evaporation load (5%-40% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 2
Greatest amount of water, absorption and evaporation load (over 40% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 3
Specialty drying - (hardwood; plaster; concrete) - deep pockets of saturation. --
CORRECT ANSWER--Class 4
_______ has strong bonding properties and the ability to dissolve materials.
Only natural substance that's found in 3 states (liquid, solid (ice), gas (vapor)) at
temps norm. found in earth. --CORRECT ANSWER--Water
Page 4 of 165
(WRT) CERTIFICATION, IICRC WATER
DAMAGE RESTORATION TECHNICIAN, IICRC
WATER DAMAGE RESTORATION TRAINING
MANUAL EXAM QUESTIONS AND ANSWERS
2026 LATEST
A non-invasive (non-penetrating) _______ ___ tracks the migration of water
below hard finish surfaces, such as under vinyl tile or ceramic tile --CORRECT
ANSWER--Moisture meter
A invasive/ penetrating device to check moisture on carpet and padding. --
CORRECT ANSWER--
_____ air holds MORE moisture than cold air. Air is dryer in winter. --
CORRECT ANSWER--Warm
As the air gets warmer, RELATIVE HUMIDITY is _______.
100% RH in cold climate is DRYER than 50% RH in a warmer climate. --
CORRECT ANSWER--Lowered
____ is the amount of moisture in the air compared to what the air can hold at
that temperature.
Page 1 of 165
,RH is the amount of water vapor (individual water molecules) in a given parcel
of air RELATIVE to the # of water molecules that could be in that particular
parcel of air.. without it reaching dew point (
Air is 78% nitrogen molecules, oxygen and others. Molecules aren't interacting
w/ eachother. Space between them. We can put WATER MOLECULES in that
space.
RH = how many water molecules we are putting in the spaces between the air
molecules.
As air is heated --> molecules move faster --> spread further apart --->
VOLUME INCREASES. More space for more water molecules. --CORRECT
ANSWER--Relative Humidity (RH)
water that originates from a sanatary water source and does not pose substantial
risk.
Examples broken water lines, tub or sink overflows with no contaminants,
appliance malfunctions involving water supply lines, rainwater --CORRECT
ANSWER--Category 1 Water
Page 2 of 165
,1st indicator that it went from category 1 to 2 --> ___ --CORRECT ANSWER--
odor
Water that has a significant degree of chemical, biological and/or physical
containment.
Aquarium leaks, waterbed leaks, toilet bowl overflows (that contain urine),
dishwasher or clothes washer discharge, and water that enters the structure from
hydrostatic pressure.
Has the potential to cause sickness or discomfort and should NOT be allowed to
dwell in a structure for an extended period of time. --CORRECT ANSWER--
Category 2 Water
Water that contains grossly contaminated water and can cause harmful reactions
to humans. Carries PATHOGENIC AGENTS
examples sewage, all forms of flooding seawater, water from river, etc. --
CORRECT ANSWER--Category 3 Water
--CORRECT ANSWER--Special Situations
Originates from a sanitary water source. --CORRECT ANSWER--Category 1
Page 3 of 165
, Contaminated; may cause discomfort or sickness. --CORRECT ANSWER--
Category 2
Grossly contaminated; includes toxins, pathogens. --CORRECT ANSWER--
Category 3
Least amount of water, absorption and evaporation load (less than 5% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 1
Large amount of water, absorption and evaporation load (5%-40% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 2
Greatest amount of water, absorption and evaporation load (over 40% porous
materials wet compared to SF of wet walls, floors and ceilings). --CORRECT
ANSWER--Class 3
Specialty drying - (hardwood; plaster; concrete) - deep pockets of saturation. --
CORRECT ANSWER--Class 4
_______ has strong bonding properties and the ability to dissolve materials.
Only natural substance that's found in 3 states (liquid, solid (ice), gas (vapor)) at
temps norm. found in earth. --CORRECT ANSWER--Water
Page 4 of 165
