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Wrt Exam. Questions With 100% Correct Answers.

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What is the definition of class 4 water? Deeply bound or held water, with a significant amount of water absorption. What is the definition of class 3 water? greatest amount of water absorption and evaporation load. -more than 40% of combined floor, wall, and ceiling surface in a space. What is the definition of class 2 water? significant amount of water absorption and evaporation load. -5-40% of combined floor, wall, and ceiling surface in a space. What is the definition of condensation? the process of a vapor changing to a liquid What is the definition of moisture level? measurement of amount of moisture contained in a material on a relative scale. -This term is used when using an instrument that is not calibrated for that material. What is a combined drying system? Merges the benefits of dry exterior air and mechanical dehumidification. What is the definition of convection? the transfer of heat through the movement of liquids or gases What is the definition of a moisture meter? device that measures moisture content or level in a material. What is the definition of vapor diffusion?

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WRT EXAM
Infiltration
When air comes into a structure through cracks or openings in a building, usually due
to negative pressure.




Exfiltration
When air leaves a structure through cracks or openings in a building usually due to
positive pressure.




What is the significance of 30% moisture content?
Can support wet rot in wood, as well as fiber saturation.




To determine initial dehumidifier capacity recommendations, what must be
known?
Cubic feet, class of water, Dehumidifier type.

, What two documents determine if evaporation and dehumidification are
complete?
Moisture map & daily humidity record.




What is HEPA?
High Efficiency Particulate Air, 99.97% effective @ .3 microns




What is the significance of 16% moisture content?
Can support mold growth in wood.




What are examples of Category 3 water?
-Sewage
- Ground surface water, rivers/streams
- all flooding from sea water
- wind-driven rain, weather related events
- toilet backflows from beyond the P trap




What is the S-500?
Standard of Care for the Water Restoration Industry

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