1|Page
IICRC Water Damage Restoration (WRT) Course Exam
Newest 2025 featuring 200 accurate and verified questions
covering water damage categories and classes,
psychrometry, equipment usage, drying standards, microbial
concerns, and safety protocols. Aligned with IICRC
certification requirements.
what is a balanced drying system? - ANSWER-The rate of
evaporation does not exceed rate of dehumidification.
If you use the outdoor air in your drying process, is that an
"open" or "closed" drying system? - ANSWER-open drying
system
how do you know if you can use the outdoor air in your drying
strategy? - ANSWER-if it is warmer than the dew point
temperature and is dryer than the inside of the structure
what does and air filtration device (AFD) do? - ANSWER-
removes particulate from the air
When can an AFD be used? - ANSWER-cat 3 water losses and
when occupants are at risk
,2|Page
when should an indoor environmental professional (IEP) be
used? - ANSWER-specialty situations, daycares, seniors homes,
etc.
"the amount of water vapor mixed with a given volume of dry
air" is called: - ANSWER-Humidity Ratio
"the pressure exerted by the water vapor molecules in the air on
surrounding surfaces." is called: - ANSWER-vapor pressure
When the air is at 100% RH, it is also at its: - ANSWER-
saturation point
When vapor passes through a solid material, this is
the material's": - ANSWER-permeance
what does it mean when we say "nature always seeks and
equilibrium" - ANSWER-areas of high pressure seek areas of
low pressure
,3|Page
if the outside is "warm and wet" the what conditions would be
necessary outside if we were to use the outdoor air to dry the
structure? - ANSWER-warm and dry
cat 1 water; 45*F in the house. How would you address the
drying - ANSWER-raise the temperature
when water evaporates, does the surface become cooler or
hotter? Why? - ANSWER-Cooler- uses the energy from the
surface to change to a gas
what relative humidity (and Above) can support microbial
growth? - ANSWER-70%
What three pieces of information are on the right hand side of
the psychrometry chart? are they related to each other? -
ANSWER-GPP humidity ratio, dewpoint, and Vapor Pressure
how do you determine cubic feet in a room - ANSWER-LxWxH
how many gallons in a cubic foot of water - ANSWER-7.48 gal
, 4|Page
How many air movers are installed in each affected room - to
start? - ANSWER-1
ADD one airmover for every "how many" square feet of floor -
ANSWER-50-70
ADD another air mover for every "how many"
square feet for wet walls above 2' high? - ANSWER-100-150
ADD another air mover for every "what" that is
larger than 18 inches? - ANSWER-offset
what tool do you use to remove moisture from air? - ANSWER-
dehumidifier
how does a refrigerant humidifier collect water vapor? -
ANSWER-Through the process of condensation
what temperature range do refrigerant humidifiers work best in?
- ANSWER-70-90 Degrees F
IICRC Water Damage Restoration (WRT) Course Exam
Newest 2025 featuring 200 accurate and verified questions
covering water damage categories and classes,
psychrometry, equipment usage, drying standards, microbial
concerns, and safety protocols. Aligned with IICRC
certification requirements.
what is a balanced drying system? - ANSWER-The rate of
evaporation does not exceed rate of dehumidification.
If you use the outdoor air in your drying process, is that an
"open" or "closed" drying system? - ANSWER-open drying
system
how do you know if you can use the outdoor air in your drying
strategy? - ANSWER-if it is warmer than the dew point
temperature and is dryer than the inside of the structure
what does and air filtration device (AFD) do? - ANSWER-
removes particulate from the air
When can an AFD be used? - ANSWER-cat 3 water losses and
when occupants are at risk
,2|Page
when should an indoor environmental professional (IEP) be
used? - ANSWER-specialty situations, daycares, seniors homes,
etc.
"the amount of water vapor mixed with a given volume of dry
air" is called: - ANSWER-Humidity Ratio
"the pressure exerted by the water vapor molecules in the air on
surrounding surfaces." is called: - ANSWER-vapor pressure
When the air is at 100% RH, it is also at its: - ANSWER-
saturation point
When vapor passes through a solid material, this is
the material's": - ANSWER-permeance
what does it mean when we say "nature always seeks and
equilibrium" - ANSWER-areas of high pressure seek areas of
low pressure
,3|Page
if the outside is "warm and wet" the what conditions would be
necessary outside if we were to use the outdoor air to dry the
structure? - ANSWER-warm and dry
cat 1 water; 45*F in the house. How would you address the
drying - ANSWER-raise the temperature
when water evaporates, does the surface become cooler or
hotter? Why? - ANSWER-Cooler- uses the energy from the
surface to change to a gas
what relative humidity (and Above) can support microbial
growth? - ANSWER-70%
What three pieces of information are on the right hand side of
the psychrometry chart? are they related to each other? -
ANSWER-GPP humidity ratio, dewpoint, and Vapor Pressure
how do you determine cubic feet in a room - ANSWER-LxWxH
how many gallons in a cubic foot of water - ANSWER-7.48 gal
, 4|Page
How many air movers are installed in each affected room - to
start? - ANSWER-1
ADD one airmover for every "how many" square feet of floor -
ANSWER-50-70
ADD another air mover for every "how many"
square feet for wet walls above 2' high? - ANSWER-100-150
ADD another air mover for every "what" that is
larger than 18 inches? - ANSWER-offset
what tool do you use to remove moisture from air? - ANSWER-
dehumidifier
how does a refrigerant humidifier collect water vapor? -
ANSWER-Through the process of condensation
what temperature range do refrigerant humidifiers work best in?
- ANSWER-70-90 Degrees F
