IICRC MASTER RESTORATION
TECHNICIAN (MRT) CERTIFICATION
EXAM QUESTION AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. Which IICRC standard governs water damage restoration?
A. S500
B. S520
C. S540
D. S700
Answer: A
Rationale: The ANSI/IICRC S500 Standard provides principles and
procedures for professional water damage restoration.
2. Category 2 water is best described as:
A. Clean potable water
B. Water with significant chemical contamination
C. Water with biological contaminants causing illness
D. Distilled water
Answer: B
Rationale: Category 2 (gray water) contains significant chemical,
biological, or physical contaminants.
3. Which drying principle focuses on increasing vapor pressure difference?
A. Air movement
B. Temperature control
C. Dehumidification
, D. Pressure balancing
Answer: B
Rationale: Raising temperature increases vapor pressure, accelerating
evaporation.
4. Class 4 water loss is defined by:
A. Minimal water absorption
B. Significant absorption in porous materials
C. Deeply held water in low-permeance materials
D. Surface wetting only
Answer: C
Rationale: Class 4 involves bound water in materials like hardwood, brick,
or plaster.
5. Which psychrometric value measures actual moisture in air?
A. Relative humidity
B. Dew point
C. Grains per pound
D. Specific volume
Answer: C
Rationale: Grains per pound directly measure the amount of water vapor
in air.
6. The primary goal of dehumidification is to:
A. Increase airflow
B. Lower temperature
C. Remove water vapor from air
D. Kill microorganisms
Answer: C
Rationale: Dehumidifiers remove moisture from the air to facilitate
drying.
7. Which dehumidifier is most effective in cooler conditions?
A. Refrigerant (LGR)
B. Conventional refrigerant
C. Desiccant
D. Axial fan
, Answer: C
Rationale: Desiccant dehumidifiers perform well at low temperatures and
low humidity.
8. What instrument measures moisture inside materials?
A. Hygrometer
B. Anemometer
C. Moisture meter
D. Barometer
Answer: C
Rationale: Moisture meters measure moisture content within materials.
9. The S520 standard primarily addresses:
A. Fire damage
B. Water damage
C. Mold remediation
D. Biohazard cleanup
Answer: C
Rationale: ANSI/IICRC S520 is the Standard for Professional Mold
Remediation.
10.Which PPE level is typically required for Category 3 water?
A. Minimal PPE
B. Gloves only
C. Full PPE including respirator
D. No PPE
Answer: C
Rationale: Category 3 water poses high health risks, requiring full PPE.
11.Which document establishes the scope of work?
A. Job diary
B. Work authorization
C. Contract
D. Safety plan
Answer: B
TECHNICIAN (MRT) CERTIFICATION
EXAM QUESTION AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. Which IICRC standard governs water damage restoration?
A. S500
B. S520
C. S540
D. S700
Answer: A
Rationale: The ANSI/IICRC S500 Standard provides principles and
procedures for professional water damage restoration.
2. Category 2 water is best described as:
A. Clean potable water
B. Water with significant chemical contamination
C. Water with biological contaminants causing illness
D. Distilled water
Answer: B
Rationale: Category 2 (gray water) contains significant chemical,
biological, or physical contaminants.
3. Which drying principle focuses on increasing vapor pressure difference?
A. Air movement
B. Temperature control
C. Dehumidification
, D. Pressure balancing
Answer: B
Rationale: Raising temperature increases vapor pressure, accelerating
evaporation.
4. Class 4 water loss is defined by:
A. Minimal water absorption
B. Significant absorption in porous materials
C. Deeply held water in low-permeance materials
D. Surface wetting only
Answer: C
Rationale: Class 4 involves bound water in materials like hardwood, brick,
or plaster.
5. Which psychrometric value measures actual moisture in air?
A. Relative humidity
B. Dew point
C. Grains per pound
D. Specific volume
Answer: C
Rationale: Grains per pound directly measure the amount of water vapor
in air.
6. The primary goal of dehumidification is to:
A. Increase airflow
B. Lower temperature
C. Remove water vapor from air
D. Kill microorganisms
Answer: C
Rationale: Dehumidifiers remove moisture from the air to facilitate
drying.
7. Which dehumidifier is most effective in cooler conditions?
A. Refrigerant (LGR)
B. Conventional refrigerant
C. Desiccant
D. Axial fan
, Answer: C
Rationale: Desiccant dehumidifiers perform well at low temperatures and
low humidity.
8. What instrument measures moisture inside materials?
A. Hygrometer
B. Anemometer
C. Moisture meter
D. Barometer
Answer: C
Rationale: Moisture meters measure moisture content within materials.
9. The S520 standard primarily addresses:
A. Fire damage
B. Water damage
C. Mold remediation
D. Biohazard cleanup
Answer: C
Rationale: ANSI/IICRC S520 is the Standard for Professional Mold
Remediation.
10.Which PPE level is typically required for Category 3 water?
A. Minimal PPE
B. Gloves only
C. Full PPE including respirator
D. No PPE
Answer: C
Rationale: Category 3 water poses high health risks, requiring full PPE.
11.Which document establishes the scope of work?
A. Job diary
B. Work authorization
C. Contract
D. Safety plan
Answer: B
