IICRC WATER DAMAGE RESTORATION TECHNICIAN (WRT)
ADVANCED CERTIFICATION EXAM 200 QUESTIONS WITH
ANSWERS AND RATIONALES
1. According to the ANSI/IICRC S500, what is the specific definition of
Category 3 water?
A. Water that is highly contaminated and could contain pathogenic,
toxigenic, or other harmful agents.
B. Water from a broken pipe that does not pose a substantial risk to
humans.
C. Water that contains significant contamination and has the potential
to cause discomfort or sickness.
D. Water originating from a source that does not pose substantial harm
to humans, such as a water supply line.
Answer: A
Rationale: Category 3 water is grossly contaminated and can contain
pathogens, silt, organic matter, and toxic substances. Examples include
sewage, toilet backflows, and rising floodwaters.
2. Which of the following describes the point at which air is 100%
saturated and can no longer hold moisture?
A. Dew Point
,B. Relative Humidity
C. Humidity Ratio
D. Vapor Pressure
Answer: A
Rationale: The dew point is the temperature at which air becomes
saturated and water vapor begins to condense into liquid water.
3. In the context of psychrometrics, what does Grains Per Pound (GPP)
measure?
A. The pressure exerted by water molecules on the surrounding air.
B. The ratio of water vapor in the air to the maximum amount the air
could hold.
C. The weight of the water vapor in one pound of dry air.
D. The weight of liquid water absorbed by a porous material.
Answer: C
Rationale: Grains Per Pound (GPP) is a measure of the humidity ratio,
representing the weight of water vapor in one pound of dry air.
4. A conventional refrigerant dehumidifier typically loses its
effectiveness when the Grains Per Pound (GPP) drops below:
A. 34 GPP
B. 45 GPP
,C. 70 GPP
D. 55 GPP
Answer: D
Rationale: Conventional refrigerant dehumidifiers generally become
inefficient once the humidity ratio reaches approximately 55-60 GPP.
5. What is the primary mechanism by which a desiccant dehumidifier
removes moisture from the air?
A. Lowering the air temperature below the dew point.
B. Increasing the air temperature to facilitate evaporation.
C. Compressing the air to force moisture out.
D. Adsorption of water molecules onto a chemical substance like silica
gel.
Answer: D
Rationale: Desiccants use chemical attraction (adsorption) to pull
moisture out of the air, allowing them to reach much lower GPP levels
than refrigerants.
6. Which document establishes the standard of care for professional
water damage restoration?
A. OSHA 1910
B. IICRC S500
C. EPA 608
, D. IICRC S520
Answer: B
Rationale: The ANSI/IICRC S500 is the Standard for Professional Water
Damage Restoration and establishes the procedures and precautions for
performing water damage restoration.
7. Water originating from a sanitary water supply line that has not
contacted other materials is classified as:
A. Category 1
B. Category 2
C. Category 3
D. Category 4
Answer: A
Rationale: Category 1 water is clean water from a sanitary source.
Examples include broken water supply lines and tub overflows with no
contaminants.
8. What is the minimum passing score required for the IICRC WRT
certification exam?
A. 60%
B. 70%
C. 75%
D. 80%
ADVANCED CERTIFICATION EXAM 200 QUESTIONS WITH
ANSWERS AND RATIONALES
1. According to the ANSI/IICRC S500, what is the specific definition of
Category 3 water?
A. Water that is highly contaminated and could contain pathogenic,
toxigenic, or other harmful agents.
B. Water from a broken pipe that does not pose a substantial risk to
humans.
C. Water that contains significant contamination and has the potential
to cause discomfort or sickness.
D. Water originating from a source that does not pose substantial harm
to humans, such as a water supply line.
Answer: A
Rationale: Category 3 water is grossly contaminated and can contain
pathogens, silt, organic matter, and toxic substances. Examples include
sewage, toilet backflows, and rising floodwaters.
2. Which of the following describes the point at which air is 100%
saturated and can no longer hold moisture?
A. Dew Point
,B. Relative Humidity
C. Humidity Ratio
D. Vapor Pressure
Answer: A
Rationale: The dew point is the temperature at which air becomes
saturated and water vapor begins to condense into liquid water.
3. In the context of psychrometrics, what does Grains Per Pound (GPP)
measure?
A. The pressure exerted by water molecules on the surrounding air.
B. The ratio of water vapor in the air to the maximum amount the air
could hold.
C. The weight of the water vapor in one pound of dry air.
D. The weight of liquid water absorbed by a porous material.
Answer: C
Rationale: Grains Per Pound (GPP) is a measure of the humidity ratio,
representing the weight of water vapor in one pound of dry air.
4. A conventional refrigerant dehumidifier typically loses its
effectiveness when the Grains Per Pound (GPP) drops below:
A. 34 GPP
B. 45 GPP
,C. 70 GPP
D. 55 GPP
Answer: D
Rationale: Conventional refrigerant dehumidifiers generally become
inefficient once the humidity ratio reaches approximately 55-60 GPP.
5. What is the primary mechanism by which a desiccant dehumidifier
removes moisture from the air?
A. Lowering the air temperature below the dew point.
B. Increasing the air temperature to facilitate evaporation.
C. Compressing the air to force moisture out.
D. Adsorption of water molecules onto a chemical substance like silica
gel.
Answer: D
Rationale: Desiccants use chemical attraction (adsorption) to pull
moisture out of the air, allowing them to reach much lower GPP levels
than refrigerants.
6. Which document establishes the standard of care for professional
water damage restoration?
A. OSHA 1910
B. IICRC S500
C. EPA 608
, D. IICRC S520
Answer: B
Rationale: The ANSI/IICRC S500 is the Standard for Professional Water
Damage Restoration and establishes the procedures and precautions for
performing water damage restoration.
7. Water originating from a sanitary water supply line that has not
contacted other materials is classified as:
A. Category 1
B. Category 2
C. Category 3
D. Category 4
Answer: A
Rationale: Category 1 water is clean water from a sanitary source.
Examples include broken water supply lines and tub overflows with no
contaminants.
8. What is the minimum passing score required for the IICRC WRT
certification exam?
A. 60%
B. 70%
C. 75%
D. 80%
