WRT & ASD TEST QUESTIONS FULLYS SOLVED 2024.

Psychrometry Study of the relationship between air, humidity, and temperature and their effects on materials and comfort levels Evaporation Process of changing a liquid to a vapor Dehumidification Reducing moisture content in the air Dry Bulb Temperature Temperature degree registered by a thermometer Dew Point The point at which humidity in the air reaches saturation or 100 Percent RH Saturation Point Point at which air or materials can absorb no more moisture, drying stops, and air temperature reached dew point Condensation Conversion of water from vapor state back to liquid state Relative Humidity (RH) The amount of moisture in a given volume of air, expressed as a percentage, at a given temperature Infiltration Migration of air into an area from an outside area due to high VP differential Balanced Drying Ideal drying situation in which the rate of evaporation is equal to or slightly less than the rate of dehumidification or ventilation GPP Unit used to measure humidity ratio 7000 Grains of water vapor Equals 1 pound of water 14 cubic feet of dry air Equals 1 pound Humidity Ratio The weight of suspended moisture in air expressed in GPP Hygroscopic Material that readily absorbs and retains moisture or water vapor from air in an attempt to reach equilibrium Moisture Content (MC) Weight or percentage of moisture in materials, as compared to the weight of oven dried , like material Permeance A measure of water flow through materials of specific thickness Moisture Gradient Different levels of moisture content within a wood material Vapor Pressure Pressure on surfaces exerted by substances in a gaseous state directly related to dehumidification Vapor Barrier Permeance Factor of 1 or less Grain Depression Reduction of humidity ratio as noted in difference from ambient air to output on dehumidifier HAT Humidity, Airflow, Temperature Control Directly Related Vapor Pressure (VP), Humidity Ratio, and Dew Point Inversely Related Temperature and RH Open Drying Intentionally exchanging inddor with outdoor air without using dehu's Closed Drying Use of mechanical dehu's Heat Drying Systems Directed Heat and Ambient Heat Applications increase the rate of evaporation by increasing the surface temperature of wet materials 40 Percent RH to attempt to achieve after initial 24 hours of drying 60 Percent RH hygroscopic materials start to readily take on humidity and growth begins 14 Cubic feet in a pound of dry air 7000 Grains in a pound of dry air 55 GPP where conventional dehu's start to lose efficiency 34 GPP where LGR dehu's start to lose efficiency 70-90 Degrees Temp at which refrigerant dehu's have best performance 30 percent RH where LGR dehu's start to lose efficiency 12,000 Btu removal action per ton of air conditioning per hour 10-16 feet distance recommended per foot with most airmovers for potentially effective evaporation 50-60 feet Alternative per square foot recommendation for airmover placement 7.48 Gallons per cubic foot of water depth 3 feet Distance of hardwood floor panels pulling from any direction as maximum distance set up for injectidry system 100 percent RH at saturation / dew point 16 percent Non-rotting fungi growth ON wood Shall Means that the practice or procedure is mandatory Should Means the practice or procedure is a component of the accepted "standard of care" to be followed Recommended Means the practice or procedure is advised or suggested but is not a component of the the accepted "standard of care" to be followed Class 1 Water intrusion with the least amount of water, absorption and evaporation load representing less than 5 percent of the affected area Class 2 Water intrusion with a large amount of water, absorption, and evaporation load representing 5-40 percent of the affected area Class 3 Water intrusion with the greatest amount of water, absorption, and evaporation load representing more than 40 percent o