IICRC S500 WATER MITIGATION EXAM
WITH CORRECT QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
True False - ANSWERS-Evaporation of wet materials occurs
at greater rate when the materials surface temp is above
dew point temp
Sources of Category 1 - ANSWERS-Broken water/supply line,
tub/sink overflow, commode tank leak, falling rainwater,
Sources of Category 2 - ANSWERS-Overflow from washing
machine, broken aquariums, water bed, toilet bowl no feces
Sources of Category 3 - ANSWERS-Toilet/sewage backflow,
ground water, sea water, river/streams
HEPA filters - ANSWERS-high efficiency particulate air filters
,True False - ANSWERS-70% RH is a warning sign - should be
below 40% within 24 hours - if not something is wrong -
TRUE
True False - ANSWERS-Sagging drywall must be removed
/discarded right away -- TRUE
Mold spores - ANSWERS-reproductive seeds of mold, causes
it to spread rapidly
Mildew - ANSWERS-A type of fungus that affects plants
True or False - ANSWERS-Elevated vapor pressure in a room
Can cause secondary damage to hygroscopic materials
True or False - ANSWERS-The control of temperature is
important to enhance both evaporation and
dehumidification for effective drying
True or False - ANSWERS-When temperature increases
evaporation of absorbed water increases and water vapor
suspended in air also increases.
, Classification of Water Intrusion - ANSWERS-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 - ANSWERS-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 - ANSWERS-has a significant amount of water
absorption and evaporation load, affection 5-40% porous
materials, with minimal absorption into low evaporated
materials
Class 3 - ANSWERS-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 - ANSWERS-has deeply held or bound water, and
significant absorption into low evaporation materials.
WITH CORRECT QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
True False - ANSWERS-Evaporation of wet materials occurs
at greater rate when the materials surface temp is above
dew point temp
Sources of Category 1 - ANSWERS-Broken water/supply line,
tub/sink overflow, commode tank leak, falling rainwater,
Sources of Category 2 - ANSWERS-Overflow from washing
machine, broken aquariums, water bed, toilet bowl no feces
Sources of Category 3 - ANSWERS-Toilet/sewage backflow,
ground water, sea water, river/streams
HEPA filters - ANSWERS-high efficiency particulate air filters
,True False - ANSWERS-70% RH is a warning sign - should be
below 40% within 24 hours - if not something is wrong -
TRUE
True False - ANSWERS-Sagging drywall must be removed
/discarded right away -- TRUE
Mold spores - ANSWERS-reproductive seeds of mold, causes
it to spread rapidly
Mildew - ANSWERS-A type of fungus that affects plants
True or False - ANSWERS-Elevated vapor pressure in a room
Can cause secondary damage to hygroscopic materials
True or False - ANSWERS-The control of temperature is
important to enhance both evaporation and
dehumidification for effective drying
True or False - ANSWERS-When temperature increases
evaporation of absorbed water increases and water vapor
suspended in air also increases.
, Classification of Water Intrusion - ANSWERS-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 - ANSWERS-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 - ANSWERS-has a significant amount of water
absorption and evaporation load, affection 5-40% porous
materials, with minimal absorption into low evaporated
materials
Class 3 - ANSWERS-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 - ANSWERS-has deeply held or bound water, and
significant absorption into low evaporation materials.
