WATER DAMAGE RESTORATION TEST PAPER
QUESTIONS AND ANSWERS GRADED A+
✔✔Drying job is done when - ✔✔Moisture meter indicates we have met our dry goal
✔✔Moisture sensor can be used to verify - ✔✔Drying goal has been met
✔✔Moisture sensors and IR Cameras are effective tools for - ✔✔Quickly locating
moisture in carpet and pad and establishing a wet perimeter
✔✔Thermo-hygrometer measures - ✔✔Temperature and relative humidity
✔✔(IR) infrared cameras indicate possible moisture in materials because - ✔✔Materials
surface temperature warms as water evaporates
✔✔Once an area is identified with an infrared camera as a suspect of being wet, that
area must be verified with - ✔✔A moisture meter or sensor
✔✔Psychrometric conditions have a direct effect on - ✔✔Rate at which moisture moves
within materials
✔✔Three things restorers can manipulate to promote drying - ✔✔Humidity, Airflow,
Temperature
✔✔Ratio of moisture in the air, as compared to the maximum amount the air could hold
- ✔✔Relative Humidity
✔✔Ratio of the weight of water vapor mixed with dry air - ✔✔Humidity Ratio
✔✔Humidity Ratio is measured and expressed as - ✔✔Grains Per Pound
✔✔Difference between the dew point temperature of surrounding air and the
temperature of the affected material - ✔✔The greater the potential for drying
✔✔To promote effective drying restorers need to control - ✔✔Surface temperature of
the wet materials, Air temperature of the drying chamber, Vapor pressure of the drying
chamber
✔✔Lowering the temperature in a drying chamber may cause - ✔✔Condensation
✔✔If you increase the temperature in a drying chamber, relative humidity will -
✔✔Decrease
, ✔✔Evaporation will increase when - ✔✔Wet materials are made warmer, When drier air
is used, When air is moved across the wet surface
✔✔At dew point temperature - ✔✔Vapor changes to liquid
✔✔Movement of water vapor through a material is caused by - ✔✔Vapor pressure
differentials
✔✔To stop further damage, wet documents should be - ✔✔Freezed
✔✔Process of changing a solid (ice) into a vapor without going through the liquid phase
- ✔✔Sublimation
✔✔Greater the temperature of wet materials, the more energy is available for -
✔✔Evaporation
✔✔If a drying chamber is 75 degrees and 40% RH, what is the humidity ratio? - ✔✔27
gpp
✔✔If a drying chamber is 68 degrees and 70% RH, what is the humidity ratio? - ✔✔72
gpp
✔✔If a drying chamber is 70 degrees and 60 gpp, what is the RH? - ✔✔55%
✔✔If the exterior is 42 degrees and 30% RH, what is the humidity ratio? - ✔✔12 gpp
✔✔If a drying chamber is 32% RH and 60 gpp, what is the temperature? - ✔✔870
✔✔Starting at a temperature of 70 and 60% RH, what temperature would you need to
get to 40% RH? - ✔✔950
✔✔What is the relative humidity if the dew point temperature is 35° and the dry bulb
temperature is 70°? - ✔✔40%
✔✔Material that is very weakened when wet but regains its original strength -
✔✔Gypsum (drywall, wallboard, sheetrock)
✔✔Material that is generally removed when wet or damaged - ✔✔Particle board
✔✔Ability for water vapor to move through materials - ✔✔Permeability
✔✔Volume of moisture a material may absorb - ✔✔Porosity
QUESTIONS AND ANSWERS GRADED A+
✔✔Drying job is done when - ✔✔Moisture meter indicates we have met our dry goal
✔✔Moisture sensor can be used to verify - ✔✔Drying goal has been met
✔✔Moisture sensors and IR Cameras are effective tools for - ✔✔Quickly locating
moisture in carpet and pad and establishing a wet perimeter
✔✔Thermo-hygrometer measures - ✔✔Temperature and relative humidity
✔✔(IR) infrared cameras indicate possible moisture in materials because - ✔✔Materials
surface temperature warms as water evaporates
✔✔Once an area is identified with an infrared camera as a suspect of being wet, that
area must be verified with - ✔✔A moisture meter or sensor
✔✔Psychrometric conditions have a direct effect on - ✔✔Rate at which moisture moves
within materials
✔✔Three things restorers can manipulate to promote drying - ✔✔Humidity, Airflow,
Temperature
✔✔Ratio of moisture in the air, as compared to the maximum amount the air could hold
- ✔✔Relative Humidity
✔✔Ratio of the weight of water vapor mixed with dry air - ✔✔Humidity Ratio
✔✔Humidity Ratio is measured and expressed as - ✔✔Grains Per Pound
✔✔Difference between the dew point temperature of surrounding air and the
temperature of the affected material - ✔✔The greater the potential for drying
✔✔To promote effective drying restorers need to control - ✔✔Surface temperature of
the wet materials, Air temperature of the drying chamber, Vapor pressure of the drying
chamber
✔✔Lowering the temperature in a drying chamber may cause - ✔✔Condensation
✔✔If you increase the temperature in a drying chamber, relative humidity will -
✔✔Decrease
, ✔✔Evaporation will increase when - ✔✔Wet materials are made warmer, When drier air
is used, When air is moved across the wet surface
✔✔At dew point temperature - ✔✔Vapor changes to liquid
✔✔Movement of water vapor through a material is caused by - ✔✔Vapor pressure
differentials
✔✔To stop further damage, wet documents should be - ✔✔Freezed
✔✔Process of changing a solid (ice) into a vapor without going through the liquid phase
- ✔✔Sublimation
✔✔Greater the temperature of wet materials, the more energy is available for -
✔✔Evaporation
✔✔If a drying chamber is 75 degrees and 40% RH, what is the humidity ratio? - ✔✔27
gpp
✔✔If a drying chamber is 68 degrees and 70% RH, what is the humidity ratio? - ✔✔72
gpp
✔✔If a drying chamber is 70 degrees and 60 gpp, what is the RH? - ✔✔55%
✔✔If the exterior is 42 degrees and 30% RH, what is the humidity ratio? - ✔✔12 gpp
✔✔If a drying chamber is 32% RH and 60 gpp, what is the temperature? - ✔✔870
✔✔Starting at a temperature of 70 and 60% RH, what temperature would you need to
get to 40% RH? - ✔✔950
✔✔What is the relative humidity if the dew point temperature is 35° and the dry bulb
temperature is 70°? - ✔✔40%
✔✔Material that is very weakened when wet but regains its original strength -
✔✔Gypsum (drywall, wallboard, sheetrock)
✔✔Material that is generally removed when wet or damaged - ✔✔Particle board
✔✔Ability for water vapor to move through materials - ✔✔Permeability
✔✔Volume of moisture a material may absorb - ✔✔Porosity
