WRT (WATER RESTORATION
TECHNICIAN) CERTIFICATION LATEST
UPDATE 2026 – PRACTICE QUESTIONS
WITH VERIFIED ANSWERS AND
DETAILED RATIONALES ||A+ GRADED
1. Category 1 water is best described as:
A. Grossly contaminated water
B. Clean water from sanitary source
C. Sewage water
D. River flood water
Answer: B
Rationale: Category 1 originates from a sanitary source and poses minimal risk initially.
2. Category 2 water contains:
A. Pathogenic agents
B. Significant contamination
C. Chemicals and microorganisms that may cause illness
D. No contaminants
Answer: C
Rationale: Category 2 (gray water) may contain microorganisms and nutrients.
3. Category 3 water is also known as:
A. Clean water
B. Gray water
C. Black water
D. Potable water
Answer: C
Rationale: Category 3 is grossly contaminated (sewage, flooding, etc.).
,4. If Category 1 water remains untreated for 48 hours, it may become:
A. Category 2 or 3
B. Still Category 1
C. Potable
D. Safe to drink
Answer: A
Rationale: Microbial growth can increase contamination over time.
5. Flood water from a river is typically:
A. Category 1
B. Category 2
C. Category 3
D. Category 0
Answer: C
Rationale: River flooding is presumed grossly contaminated.
Category 2: Classes of Water Damage
6. Class 1 water damage affects:
A. Entire building
B. Only part of a room with low absorption materials
C. All walls and ceiling
D. Structural framing
Answer: B
Rationale: Minimal moisture and low permeance materials.
7. Class 4 involves:
A. Carpet only
B. Hardwood only
C. Specialty drying situations like plaster, concrete
D. Drywall only
Answer: C
Rationale: Low permeance materials require special drying methods.
8. Class 3 water damage includes:
A. Ceiling and walls saturated
B. Floor only
C. Carpet only
, D. No absorption
Answer: A
Rationale: Water from overhead affecting ceilings, walls, insulation.
9. Class is determined by:
A. Water category
B. Rate of evaporation
C. Type of building
D. Age of structure
Answer: B
Rationale: Class refers to amount of water and evaporation potential.
10. Class 2 damage usually affects:
A. One wall and floor
B. Ceiling only
C. Multiple walls with absorption
D. HVAC only
Answer: C
Rationale: Significant absorption into structural materials.
Category 3: Psychrometry & Drying Science
11. Relative humidity (RH) measures:
A. Temperature
B. Air movement
C. Moisture vapor in air relative to capacity
D. Dew point only
Answer: C
Rationale: RH is percentage of moisture in air compared to maximum at that temperature.
12. Dew point is:
A. Highest temperature
B. Temperature at which condensation occurs
C. Lowest RH
D. Wet bulb reading
Answer: B
Rationale: Dew point is where vapor becomes liquid.
TECHNICIAN) CERTIFICATION LATEST
UPDATE 2026 – PRACTICE QUESTIONS
WITH VERIFIED ANSWERS AND
DETAILED RATIONALES ||A+ GRADED
1. Category 1 water is best described as:
A. Grossly contaminated water
B. Clean water from sanitary source
C. Sewage water
D. River flood water
Answer: B
Rationale: Category 1 originates from a sanitary source and poses minimal risk initially.
2. Category 2 water contains:
A. Pathogenic agents
B. Significant contamination
C. Chemicals and microorganisms that may cause illness
D. No contaminants
Answer: C
Rationale: Category 2 (gray water) may contain microorganisms and nutrients.
3. Category 3 water is also known as:
A. Clean water
B. Gray water
C. Black water
D. Potable water
Answer: C
Rationale: Category 3 is grossly contaminated (sewage, flooding, etc.).
,4. If Category 1 water remains untreated for 48 hours, it may become:
A. Category 2 or 3
B. Still Category 1
C. Potable
D. Safe to drink
Answer: A
Rationale: Microbial growth can increase contamination over time.
5. Flood water from a river is typically:
A. Category 1
B. Category 2
C. Category 3
D. Category 0
Answer: C
Rationale: River flooding is presumed grossly contaminated.
Category 2: Classes of Water Damage
6. Class 1 water damage affects:
A. Entire building
B. Only part of a room with low absorption materials
C. All walls and ceiling
D. Structural framing
Answer: B
Rationale: Minimal moisture and low permeance materials.
7. Class 4 involves:
A. Carpet only
B. Hardwood only
C. Specialty drying situations like plaster, concrete
D. Drywall only
Answer: C
Rationale: Low permeance materials require special drying methods.
8. Class 3 water damage includes:
A. Ceiling and walls saturated
B. Floor only
C. Carpet only
, D. No absorption
Answer: A
Rationale: Water from overhead affecting ceilings, walls, insulation.
9. Class is determined by:
A. Water category
B. Rate of evaporation
C. Type of building
D. Age of structure
Answer: B
Rationale: Class refers to amount of water and evaporation potential.
10. Class 2 damage usually affects:
A. One wall and floor
B. Ceiling only
C. Multiple walls with absorption
D. HVAC only
Answer: C
Rationale: Significant absorption into structural materials.
Category 3: Psychrometry & Drying Science
11. Relative humidity (RH) measures:
A. Temperature
B. Air movement
C. Moisture vapor in air relative to capacity
D. Dew point only
Answer: C
Rationale: RH is percentage of moisture in air compared to maximum at that temperature.
12. Dew point is:
A. Highest temperature
B. Temperature at which condensation occurs
C. Lowest RH
D. Wet bulb reading
Answer: B
Rationale: Dew point is where vapor becomes liquid.
