WATER DAMAGE RESTORATION QUESTIONS AND
ANSWERS GRADED A+
✔✔What is the most important factor of category 3 water - ✔✔Health of workers and
occupants
✔✔If a regulated or hazardous material is part of a water damage restoration project
who may be necessary to assist in damage assessment - ✔✔A specialized expert
✔✔Class 1 water damage - ✔✔Least amount of water
Less than 5% of the combined room is effected
✔✔Class 2 water damage - ✔✔Significant amount of water
40% or less of the combined room is effected
✔✔Class 3 water damage - ✔✔Greatest Amount of water
More than 40% of the combined room is effected
✔✔Class 4 water damage - ✔✔Deeply held water (concrete)
✔✔How can you reduce drying time in porous materials - ✔✔Multiple extraction passes
✔✔How can you minimize damage and reduce drying time - ✔✔Begin mitigation as
soon as you determine its safe to do so
✔✔Why should you no circulate air onto areas wig visible or suspected contamination -
✔✔You could contaminate unaffected areas
✔✔___________ the temp of the water in wet materials, ___________ the rate of
evaporation - ✔✔Increases
✔✔Evaporation occurs at a greater rate if... - ✔✔the materials surface temperature is
higher than dew point
✔✔70-90 degrees F - ✔✔Use refrigerant dehumidifiers
70-80 degrees F if the space is going to be occupied
✔✔What relationship must technicians understand to achieve the most efficient dryin -
✔✔The relationship between humidity, air flow and temperature (H.A.T)
✔✔Ideal temperatures for drying are... - ✔✔High temperatures with low relative humidity
(Above 70, 40% or lower)
, ✔✔Closed drying system - ✔✔Uses mechanical dehumidification (dehumidifier)
Should be used when humidity outside is higher then inside
✔✔When determining relative humidity where should you check - ✔✔Affected areas
Unaffected areas
Each dehumidifier
HVAC
✔✔What does a drying goal include - ✔✔A measurement of moisture content or level
for all affected materials taken from an unaffected area, comparable building or known
EMC
✔✔If outdoor GPP is lower than indoor you should consider using what kind of drying
system - ✔✔Open drying system
✔✔Upon entry to a water damage structure what should a restorer do - ✔✔Use
professional moisture detection equipment to determine psychrometric conditions and
moisture content or moisture level readings
✔✔Thermohygrometer - ✔✔Measures temperature and relative humidity
✔✔Thermal image cameras - ✔✔Uses infrared technology to find evaporative cooling
✔✔To operate the air mover in a manner, what should the technician do - ✔✔Have
safety screens on the inlets and outlets and cord with 3 prong
✔✔(AFD) air filtration devices, trap ______% of particles 0.3 microns and larger -
✔✔99.97
✔✔Refrigerant dehumidifiers - ✔✔- most effective type of dehumidifier
- removes moisture by pulling air across cold refrigerant coils causing the moisture to
condense
- works best between 70-90 degrees
✔✔Conventional refrigerant - ✔✔Loses efficiency when air dries below 55 gpp
✔✔Low grain refrigerant - ✔✔Som go as low as 34 gpp
✔✔Desiccant - ✔✔Create the lowest vapor pressure and dpp
✔✔Sterilizers - ✔✔Destroy 100% or organisms
✔✔Sanitizers - ✔✔Reduce number of organisms to a safe level
ANSWERS GRADED A+
✔✔What is the most important factor of category 3 water - ✔✔Health of workers and
occupants
✔✔If a regulated or hazardous material is part of a water damage restoration project
who may be necessary to assist in damage assessment - ✔✔A specialized expert
✔✔Class 1 water damage - ✔✔Least amount of water
Less than 5% of the combined room is effected
✔✔Class 2 water damage - ✔✔Significant amount of water
40% or less of the combined room is effected
✔✔Class 3 water damage - ✔✔Greatest Amount of water
More than 40% of the combined room is effected
✔✔Class 4 water damage - ✔✔Deeply held water (concrete)
✔✔How can you reduce drying time in porous materials - ✔✔Multiple extraction passes
✔✔How can you minimize damage and reduce drying time - ✔✔Begin mitigation as
soon as you determine its safe to do so
✔✔Why should you no circulate air onto areas wig visible or suspected contamination -
✔✔You could contaminate unaffected areas
✔✔___________ the temp of the water in wet materials, ___________ the rate of
evaporation - ✔✔Increases
✔✔Evaporation occurs at a greater rate if... - ✔✔the materials surface temperature is
higher than dew point
✔✔70-90 degrees F - ✔✔Use refrigerant dehumidifiers
70-80 degrees F if the space is going to be occupied
✔✔What relationship must technicians understand to achieve the most efficient dryin -
✔✔The relationship between humidity, air flow and temperature (H.A.T)
✔✔Ideal temperatures for drying are... - ✔✔High temperatures with low relative humidity
(Above 70, 40% or lower)
, ✔✔Closed drying system - ✔✔Uses mechanical dehumidification (dehumidifier)
Should be used when humidity outside is higher then inside
✔✔When determining relative humidity where should you check - ✔✔Affected areas
Unaffected areas
Each dehumidifier
HVAC
✔✔What does a drying goal include - ✔✔A measurement of moisture content or level
for all affected materials taken from an unaffected area, comparable building or known
EMC
✔✔If outdoor GPP is lower than indoor you should consider using what kind of drying
system - ✔✔Open drying system
✔✔Upon entry to a water damage structure what should a restorer do - ✔✔Use
professional moisture detection equipment to determine psychrometric conditions and
moisture content or moisture level readings
✔✔Thermohygrometer - ✔✔Measures temperature and relative humidity
✔✔Thermal image cameras - ✔✔Uses infrared technology to find evaporative cooling
✔✔To operate the air mover in a manner, what should the technician do - ✔✔Have
safety screens on the inlets and outlets and cord with 3 prong
✔✔(AFD) air filtration devices, trap ______% of particles 0.3 microns and larger -
✔✔99.97
✔✔Refrigerant dehumidifiers - ✔✔- most effective type of dehumidifier
- removes moisture by pulling air across cold refrigerant coils causing the moisture to
condense
- works best between 70-90 degrees
✔✔Conventional refrigerant - ✔✔Loses efficiency when air dries below 55 gpp
✔✔Low grain refrigerant - ✔✔Som go as low as 34 gpp
✔✔Desiccant - ✔✔Create the lowest vapor pressure and dpp
✔✔Sterilizers - ✔✔Destroy 100% or organisms
✔✔Sanitizers - ✔✔Reduce number of organisms to a safe level
