WRT & ASD UPDATED ACTUAL
Questions and CORRECT Answers
Psychrometry - CORRECT ANSWER - Study of the relationship between air, humidity,
and temperature and their effects on materials and comfort levels
Evaporation - CORRECT ANSWER - Process of changing a liquid to a vapor
Dehumidification - CORRECT ANSWER - Reducing moisture content in the air
Dry Bulb Temperature - CORRECT ANSWER - Temperature degree registered by a
thermometer
Dew Point - CORRECT ANSWER - The point at which humidity in the air reaches
saturation or 100 Percent RH
Saturation Point - CORRECT ANSWER - Point at which air or materials can absorb no
more moisture, drying stops, and air temperature reached dew point
Condensation - CORRECT ANSWER - Conversion of water from vapor state back to
liquid state
Relative Humidity (RH) - CORRECT ANSWER - The amount of moisture in a given
volume of air, expressed as a percentage, at a given temperature
Infiltration - CORRECT ANSWER - Migration of air into an area from an outside area due
to high VP differential
Balanced Drying - CORRECT ANSWER - Ideal drying situation in which the rate of
evaporation is equal to or slightly less than the rate of dehumidification or ventilation
, GPP - CORRECT ANSWER - Unit used to measure humidity ratio
7000 Grains of water vapor - CORRECT ANSWER - Equals 1 pound of water
14 cubic feet of dry air - CORRECT ANSWER - Equals 1 pound
Humidity Ratio - CORRECT ANSWER - The weight of suspended moisture in air
expressed in GPP
Hygroscopic - CORRECT ANSWER - Material that readily absorbs and retains moisture
or water vapor from air in an attempt to reach equilibrium
Moisture Content (MC) - CORRECT ANSWER - Weight or percentage of moisture in
materials, as compared to the weight of oven dried , like material
Permeance - CORRECT ANSWER - A measure of water flow through materials of
specific thickness
Moisture Gradient - CORRECT ANSWER - Different levels of moisture content within a
wood material
Vapor Pressure - CORRECT ANSWER - Pressure on surfaces exerted by substances in a
gaseous state directly related to dehumidification
Vapor Barrier - CORRECT ANSWER - Permeance Factor of 1 or less
Grain Depression - CORRECT ANSWER - Reduction of humidity ratio as noted in
difference from ambient air to output on dehumidifier
Questions and CORRECT Answers
Psychrometry - CORRECT ANSWER - Study of the relationship between air, humidity,
and temperature and their effects on materials and comfort levels
Evaporation - CORRECT ANSWER - Process of changing a liquid to a vapor
Dehumidification - CORRECT ANSWER - Reducing moisture content in the air
Dry Bulb Temperature - CORRECT ANSWER - Temperature degree registered by a
thermometer
Dew Point - CORRECT ANSWER - The point at which humidity in the air reaches
saturation or 100 Percent RH
Saturation Point - CORRECT ANSWER - Point at which air or materials can absorb no
more moisture, drying stops, and air temperature reached dew point
Condensation - CORRECT ANSWER - Conversion of water from vapor state back to
liquid state
Relative Humidity (RH) - CORRECT ANSWER - The amount of moisture in a given
volume of air, expressed as a percentage, at a given temperature
Infiltration - CORRECT ANSWER - Migration of air into an area from an outside area due
to high VP differential
Balanced Drying - CORRECT ANSWER - Ideal drying situation in which the rate of
evaporation is equal to or slightly less than the rate of dehumidification or ventilation
, GPP - CORRECT ANSWER - Unit used to measure humidity ratio
7000 Grains of water vapor - CORRECT ANSWER - Equals 1 pound of water
14 cubic feet of dry air - CORRECT ANSWER - Equals 1 pound
Humidity Ratio - CORRECT ANSWER - The weight of suspended moisture in air
expressed in GPP
Hygroscopic - CORRECT ANSWER - Material that readily absorbs and retains moisture
or water vapor from air in an attempt to reach equilibrium
Moisture Content (MC) - CORRECT ANSWER - Weight or percentage of moisture in
materials, as compared to the weight of oven dried , like material
Permeance - CORRECT ANSWER - A measure of water flow through materials of
specific thickness
Moisture Gradient - CORRECT ANSWER - Different levels of moisture content within a
wood material
Vapor Pressure - CORRECT ANSWER - Pressure on surfaces exerted by substances in a
gaseous state directly related to dehumidification
Vapor Barrier - CORRECT ANSWER - Permeance Factor of 1 or less
Grain Depression - CORRECT ANSWER - Reduction of humidity ratio as noted in
difference from ambient air to output on dehumidifier
