IICRC WRT 2025/2026 Test Questions and Verified Answers
100% Correct | Grade A (Latest Update)
1 Introduction
This document contains verified and accurate test questions and answers for the IICRC Water
Damage Restoration Technician (WRT) certification, fully updated for the 2025/2026 testing
period. It is designed for professionals preparing for the WRT exam to master standards,
procedures, and best practices in water restoration. The 80 questions cover all key domains,
including Categories and Classes of Water, Psychrometry and Moisture Measurement, Extrac-
tion, Drying, and Dehumidification, Microbial Contamination and Safety, and Documentation
and Equipment Use.
2 Exam Questions and Answers
The following questions reflect the IICRC WRT exam format and content. Each question
includes four answer options, with the correct answer highlighted in bold green. A brief rationale
referencing ANSI/IICRC S500 or industry standards is provided.
1. What is the primary characteristic of Category 3 water?
A. Clean water from a potable source C. Black water with gross contamination
B. Gray water with moderate contamina-
tion D. Water requiring no PPE
Rationale: Category 3 water, per ANSI/IICRC S500, includes grossly contaminated
sources (e.g., sewage) posing health risks.
2. Which class of water loss involves the least water absorption?
A. Class 4 C. Class 2
B. Class 3 D. Class 1
Rationale: Class 1 affects minimal low-permeance materials with little absorption.
3. What type of water can degrade to Category 2 if not extracted promptly?
A. Category 1 C. Category 3
B. Category 2 D. All categories
Rationale: Category 1 water can become Category 2 due to microbial growth if not
addressed quickly.
4. Which class requires specialized drying for bound water?
IICRC WRT Exam | 2025/2026 Update | Verified Questions and Answers
, A. Class 1 C. Class 4
B. Class 2 D. Class 3
Rationale: Class 4 involves deeply bound water in materials like hardwood, requiring
low-grain dehumidification.
5. What defines Category 2 water?
A. Clean water C. Grossly contaminated water
B. Significantly contaminated water D. Rainwater only
Rationale: Category 2 (gray water) contains significant contaminants (e.g., from dish-
washers).
6. Which class involves wet carpeting and padding in multiple rooms?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 2 affects entire rooms with absorbent materials like carpeting.
7. What is the primary source of Category 1 water?
A. Sewage backup C. Broken supply line
B. Washing machine overflow D. Floodwater
Rationale: Category 1 water originates from clean, potable sources.
8. Which class has water wicked up walls more than 24 inches?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 3 involves significant water intrusion with high absorption into walls.
9. What should be done with Category 3 water in a restoration project?
A. Dry in place C. Ignore if minimal
B. Treat as hazardous and extract imme-
diately D. Use air movers only
Rationale: Category 3 water is hazardous and requires immediate extraction and disposal.
10. Which class requires the most dehumidification capacity?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 3 has extensive water saturation, requiring significant dehumidification.
11. What is an example of Category 2 water source?
IICRC WRT Exam | 2025/2026 Update | Verified Questions and Answers
100% Correct | Grade A (Latest Update)
1 Introduction
This document contains verified and accurate test questions and answers for the IICRC Water
Damage Restoration Technician (WRT) certification, fully updated for the 2025/2026 testing
period. It is designed for professionals preparing for the WRT exam to master standards,
procedures, and best practices in water restoration. The 80 questions cover all key domains,
including Categories and Classes of Water, Psychrometry and Moisture Measurement, Extrac-
tion, Drying, and Dehumidification, Microbial Contamination and Safety, and Documentation
and Equipment Use.
2 Exam Questions and Answers
The following questions reflect the IICRC WRT exam format and content. Each question
includes four answer options, with the correct answer highlighted in bold green. A brief rationale
referencing ANSI/IICRC S500 or industry standards is provided.
1. What is the primary characteristic of Category 3 water?
A. Clean water from a potable source C. Black water with gross contamination
B. Gray water with moderate contamina-
tion D. Water requiring no PPE
Rationale: Category 3 water, per ANSI/IICRC S500, includes grossly contaminated
sources (e.g., sewage) posing health risks.
2. Which class of water loss involves the least water absorption?
A. Class 4 C. Class 2
B. Class 3 D. Class 1
Rationale: Class 1 affects minimal low-permeance materials with little absorption.
3. What type of water can degrade to Category 2 if not extracted promptly?
A. Category 1 C. Category 3
B. Category 2 D. All categories
Rationale: Category 1 water can become Category 2 due to microbial growth if not
addressed quickly.
4. Which class requires specialized drying for bound water?
IICRC WRT Exam | 2025/2026 Update | Verified Questions and Answers
, A. Class 1 C. Class 4
B. Class 2 D. Class 3
Rationale: Class 4 involves deeply bound water in materials like hardwood, requiring
low-grain dehumidification.
5. What defines Category 2 water?
A. Clean water C. Grossly contaminated water
B. Significantly contaminated water D. Rainwater only
Rationale: Category 2 (gray water) contains significant contaminants (e.g., from dish-
washers).
6. Which class involves wet carpeting and padding in multiple rooms?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 2 affects entire rooms with absorbent materials like carpeting.
7. What is the primary source of Category 1 water?
A. Sewage backup C. Broken supply line
B. Washing machine overflow D. Floodwater
Rationale: Category 1 water originates from clean, potable sources.
8. Which class has water wicked up walls more than 24 inches?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 3 involves significant water intrusion with high absorption into walls.
9. What should be done with Category 3 water in a restoration project?
A. Dry in place C. Ignore if minimal
B. Treat as hazardous and extract imme-
diately D. Use air movers only
Rationale: Category 3 water is hazardous and requires immediate extraction and disposal.
10. Which class requires the most dehumidification capacity?
A. Class 1 C. Class 3
B. Class 2 D. Class 4
Rationale: Class 3 has extensive water saturation, requiring significant dehumidification.
11. What is an example of Category 2 water source?
IICRC WRT Exam | 2025/2026 Update | Verified Questions and Answers
