WRT Exam Questions and
Answers
Infiltration
Ans- When air comes into a structure through cracks or openings in a building,
usually due to negative pressure.
Exfiltration
Ans- 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?
Ans- Can support wet rot in wood, as well as fiber saturation.
To determine initial dehumidifier capacity recommendations, what must be
known?
,Ans- Cubic feet, class of water, Dehumidifier type.
What two documents determine if evaporation and dehumidification are
complete?
Ans- Moisture map & daily humidity record.
What is HEPA?
Ans- High Efficiency Particulate Air, 99.97% effective @ .3 microns
What is the significance of 16% moisture content?
Ans- Can support mold growth in wood.
What are examples of Category 3 water?
Ans- -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?
Ans- Standard of Care for the Water Restoration Industry
What does AHAM stand for? What are the test conditions?
Ans- Association of Home Appliance Manufacturers
Test Conditions are 80 degrees F / 60% relative humidity over a 24 hr. time
period
What are examples of Category 2 water?
Ans- - flooding from dish washers/washing machines
- broken aquariums
- overflows from toilet on room side of P trap, some urine no feces
What is the significance of 34 GPP?
Answers
Infiltration
Ans- When air comes into a structure through cracks or openings in a building,
usually due to negative pressure.
Exfiltration
Ans- 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?
Ans- Can support wet rot in wood, as well as fiber saturation.
To determine initial dehumidifier capacity recommendations, what must be
known?
,Ans- Cubic feet, class of water, Dehumidifier type.
What two documents determine if evaporation and dehumidification are
complete?
Ans- Moisture map & daily humidity record.
What is HEPA?
Ans- High Efficiency Particulate Air, 99.97% effective @ .3 microns
What is the significance of 16% moisture content?
Ans- Can support mold growth in wood.
What are examples of Category 3 water?
Ans- -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?
Ans- Standard of Care for the Water Restoration Industry
What does AHAM stand for? What are the test conditions?
Ans- Association of Home Appliance Manufacturers
Test Conditions are 80 degrees F / 60% relative humidity over a 24 hr. time
period
What are examples of Category 2 water?
Ans- - flooding from dish washers/washing machines
- broken aquariums
- overflows from toilet on room side of P trap, some urine no feces
What is the significance of 34 GPP?
