Certification IICRC ASD Practice Exam

Applied Structural Drying Technician Certification (IICRC ASD) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following best defines the primary goal of structural

drying?

• Remove all moisture from the building materials
• Restore the property to pre-loss condition
• Control and reduce moisture content to prevent secondary

damage

• Eliminate all microbial growth

Rationale: The main objective of structural drying is to control moisture

levels to prevent further damage, such as mold growth, corrosion, and material deterioration. 1 / 4

2. Water migration occurs primarily due to:

• Gravity
• Differences in vapor pressure
• Surface tension
• Capillary action

Rationale: Moisture moves from areas of high vapor pressure to low vapor

pressure, driving evaporation and condensation processes during drying.

• Which category of water contamination is considered the most

hazardous?

• Category 1
• Category 2
• Category 3
• Category 4

Rationale: Category 3 water contains gross contaminants, such as sewage

or floodwater, and poses a significant health risk.

• Which class of water damage affects low-porosity materials and

usually requires minimal drying?

• Class 1
• Class 1
• Class 3
• Class 4 2 / 4

Rationale: Class 1 water damage involves only a small amount of water

absorption and affects low-porosity materials.

• Which of the following instruments measures the relative humidity in

air?

• Thermometer
• Psychrometer
• Hygrometer
• Anemometer

Rationale: Hygrometers are specifically designed to measure the amount

of water vapor in the air, providing relative humidity readings essential for drying decisions.

• What is the primary purpose of air movers in structural drying?
• Heat the air to evaporate moisture
• Increase air circulation to accelerate evaporation
• Reduce humidity directly
• Remove contaminants from the air

Rationale: Air movers enhance the rate of evaporation by moving air

across wet surfaces, facilitating moisture migration from materials into the air.

• Which of the following best describes hardwood drying procedures?
• Use high heat for rapid drying
• Rely solely on dehumidifiers 3 / 4

• Apply controlled drying to prevent warping and splitting
• Remove and replace the material

Rationale: Hardwood must be dried gradually and evenly to prevent

warping, cupping, or splitting.

8. Dehumidification removes moisture from:

• Only wet materials
• Air and materials indirectly through condensation or absorption
• Air exclusively
• Only surface water

Rationale: Dehumidifiers reduce moisture from the air, which in turn

encourages water to migrate out of wet materials.

• Which psychrometric parameter represents the actual water vapor

present in the air?

• Relative humidity
• Absolute humidity
• Wet bulb temperature
• Dew point

Rationale: Absolute humidity quantifies the actual water vapor content in

the air, independent of temperature.

• What is the main risk of drying without monitoring moisture

levels?

• Extended drying time
• / 4