IICRC WRT EXAM 2 EXAM VERSIONS 2023/2024 ACTUAL
COMPLETE 100 REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES /ALREADY
GRADED A+.
In a basement that measures 25' x 30' and has water standing at a
depth of 9", how many gallons total are there? - ANSWER -4,208
gallons 25 x 30 x (9/12 =
0.75) x 7.481
In a crawlspace that measures 12' x 15' and has water standing at
a depth of 5'3", how many total gallons of water is there? -
ANSWER -12 x 15 x (5'3" = 5 3/12 = 5.25) x 7.481= 7,069 gallons
What happens when temperature decreases? - ANSWER -Relative
humidity increases:
To illustrate this, let's consider an example: Suppose you have a
room with a fixed amount of water vapor in the air. As the
temperature decreases, the air's capacity to hold water vapor
decreases, and at some point, the air becomes saturated.
Saturation occurs when the air reaches 100% relative humidity,
meaning it cannot hold any more moisture at that temperature.
,Any further decrease in temperature will cause the excess
moisture to condense out as dew or frost.
If cellulosic insulation is affected, what should be done? -
ANSWER -Typically remove the insulation and dry the structure.
Why are desiccant dehumidifiers typically used in Class 4 losses?
- ANSWER They create the lowest vapor pressure of any type of
dehumidifier.
What is the primary function of a dehumidifier? - ANSWER -
Remove water vapor from the air
If thermal energy is added to affected materials then..... -
ANSWER -Evaporation increases
If humidity remains high, what can happen to hygroscopic
materials? - ANSWER Secondary damage can occur
How often should a job site be monitored? - ANSWER -Every day
If the ambient conditions in a drying chamber are 75 degrees and
65% RH, at what surface temprature could condensation form on
materials? (psychometric chart) - ANSWER -62 degrees F:
Here's how you can calculate the dew point temperature:
, Convert the relative humidity (RH) from a percentage to a decimal
fraction: 65% RH = 0.65.
Convert the temperature from Fahrenheit to Celsius: T = (75°F -
32) × (5/9) = 23.9°C.
Use the following formula to calculate the dew point temperature
(Td): Td = T - ((100 - RH)/5).
Substituting the values: Td = 23.9°C - ((100 - 65)/5) = 23.9°C -
(35/5) = 23.9°C - 7°C = 16.9°C.
Convert the dew point temperature back to Fahrenheit: Td =
(16.9°C × (9/5)) + 32 = 62.4°F.
Which of the following has the lowest GPP?
45* and 40%RH
55* and 70%RH
65* and 35% RH
75* and 45% RH
(psychometric chart) - ANSWER -45 degrees and 40%RH
If plywood is affected by water damage it ..... - ANSWER -It is
typically resistant to water damage and can be restored if dried
properly
Which of the following is a vapor retarding material?
OSB
Drywall
COMPLETE 100 REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES /ALREADY
GRADED A+.
In a basement that measures 25' x 30' and has water standing at a
depth of 9", how many gallons total are there? - ANSWER -4,208
gallons 25 x 30 x (9/12 =
0.75) x 7.481
In a crawlspace that measures 12' x 15' and has water standing at
a depth of 5'3", how many total gallons of water is there? -
ANSWER -12 x 15 x (5'3" = 5 3/12 = 5.25) x 7.481= 7,069 gallons
What happens when temperature decreases? - ANSWER -Relative
humidity increases:
To illustrate this, let's consider an example: Suppose you have a
room with a fixed amount of water vapor in the air. As the
temperature decreases, the air's capacity to hold water vapor
decreases, and at some point, the air becomes saturated.
Saturation occurs when the air reaches 100% relative humidity,
meaning it cannot hold any more moisture at that temperature.
,Any further decrease in temperature will cause the excess
moisture to condense out as dew or frost.
If cellulosic insulation is affected, what should be done? -
ANSWER -Typically remove the insulation and dry the structure.
Why are desiccant dehumidifiers typically used in Class 4 losses?
- ANSWER They create the lowest vapor pressure of any type of
dehumidifier.
What is the primary function of a dehumidifier? - ANSWER -
Remove water vapor from the air
If thermal energy is added to affected materials then..... -
ANSWER -Evaporation increases
If humidity remains high, what can happen to hygroscopic
materials? - ANSWER Secondary damage can occur
How often should a job site be monitored? - ANSWER -Every day
If the ambient conditions in a drying chamber are 75 degrees and
65% RH, at what surface temprature could condensation form on
materials? (psychometric chart) - ANSWER -62 degrees F:
Here's how you can calculate the dew point temperature:
, Convert the relative humidity (RH) from a percentage to a decimal
fraction: 65% RH = 0.65.
Convert the temperature from Fahrenheit to Celsius: T = (75°F -
32) × (5/9) = 23.9°C.
Use the following formula to calculate the dew point temperature
(Td): Td = T - ((100 - RH)/5).
Substituting the values: Td = 23.9°C - ((100 - 65)/5) = 23.9°C -
(35/5) = 23.9°C - 7°C = 16.9°C.
Convert the dew point temperature back to Fahrenheit: Td =
(16.9°C × (9/5)) + 32 = 62.4°F.
Which of the following has the lowest GPP?
45* and 40%RH
55* and 70%RH
65* and 35% RH
75* and 45% RH
(psychometric chart) - ANSWER -45 degrees and 40%RH
If plywood is affected by water damage it ..... - ANSWER -It is
typically resistant to water damage and can be restored if dried
properly
Which of the following is a vapor retarding material?
OSB
Drywall
