Are 5.0 Ppd Exam With Correct Answers,2025 Latest Updateds

Are 5.0 Ppd Exam With Correct
Answers,2025 Latest Updateds.




lamella - CORRECT ANSWER✔✔type of roof structure, geometry allows it to span large distances with little or no support
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British Thermal Unit (BTU) - CORRECT ANSWER✔✔the amount of heat required to raise the temperature of 1 bm of water by 1°F
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Coefficient of Heat Transmission - CORRECT ANSWER✔✔the overall rate of heat flow through any combination of materials,
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including air spaces and air layers on the interior and exterior of a building assembly
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Conductance - CORRECT ANSWER✔✔the number of British thermal units per house that pass through 1 ft² of homogeneous
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material 1 in thick when the temperature differential is 1°F
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Dew point - CORRECT ANSWER✔✔the temperature at which water vapor in the air becomes saturated and begins to condense to
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drops of water
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Dry bulb temperature - CORRECT ANSWER✔✔the temperature of the air water mixture as measured with a standard dry bulb
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thermometer
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Enthalpy - CORRECT ANSWER✔✔the total heat in a substance, including latent heat and sensible heat
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Latent heat - CORRECT ANSWER✔✔heat that causes a change of state of a substance, such as the heat required to change water into
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steam
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Resistance - CORRECT ANSWER✔✔the number of hours needed for 1 Btu to pass through 1 ft² of material or assembly of a given
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thickness when the temperature differential is 1 °F. It is the reciprocal of conductance
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Sensible heat - CORRECT ANSWER✔✔heat that causes a change in temperature of a substance but not a change of state
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Specific heat - CORRECT ANSWER✔✔the number of Btus (joules) required to raise the temperature of a specific material by 1 °F
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(1K)
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Wet bulb temperature - CORRECT ANSWER✔✔the temperature of the air as measured with a sling psychrometer
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Radiation - CORRECT ANSWER✔✔the transfer of heat energy through electromagnetic waves from one surface to a cooler surface
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,Conduction - CORRECT ANSWER✔✔the transfer of heat through direct contact between two objects of different temperatures
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Viewed angle - CORRECT ANSWER✔✔the solid angle formed between the measuring position and the outer edges of the object
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Emissivity - CORRECT ANSWER✔✔the measure of an objects ability to absorb and then radiate heat j j j j j j j j j j j j j j




Mean radiant temperature (MRT) - CORRECT ANSWER✔✔the weighted average of the various surface temperatures in a room and
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the angle of exposure of the occupant to these surfaces as well as of any sunlight present
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Operative temperature - CORRECT ANSWER✔✔an average of the air temperature of a space and the mean radiant temperature (MRT)
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of the space, measured with a globe thermometer
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clo - CORRECT ANSWER✔✔unit for measuring human comfort of clothing, equal to an American man's business suit or 0.15 clo/lbm
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psychrometry - CORRECT ANSWER✔✔the study of the content of air j j j j j j j j j




enthalpy - CORRECT ANSWER✔✔the total amount of both sensible and latent heat in the air moisture mixture
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conduction - CORRECT ANSWER✔✔the transfer of heat through direct contact between molecules j j j j j j j j j j j




convection - CORRECT ANSWER✔✔the transfer of heat through the movement of air j j j j j j j j j j j




radiation - CORRECT ANSWER✔✔the transfer of heat energy through electromagnetic waves from one surface to a colder surface
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building envelope - CORRECT ANSWER✔✔consists of the walls, roof, doors, windows, and foundation
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conductivity (k) - CORRECT ANSWER✔✔the amount of heat lost through 1ft² of a 1 in thickness other than 1 in j j j j j j j j j j j j j j j j j j j




resistance (R) - CORRECT ANSWER✔✔the number of hours needed for 1 Btu to pass through a material of a given thickness when the
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temperature differential is 1K
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design equivalent temperature difference (DETD) - CORRECT ANSWER✔✔value calculated as part of heat gain, takes into account
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the air temperature differences, effects of the sun, thermal mass, storage effects of materials, colors of finishes exposed to the sun, and the
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daily temperature range
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sol air temperature - CORRECT ANSWER✔✔an outdoor temperature that combines the effects of temperature difference with solar
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radiation
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design cooling load factor (DCLF) - CORRECT ANSWER✔✔takes into account several variables that affect how solar heat gain
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occurs including the type of glazing, the type of interior shading, and the outdoor design temperature
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heat pump - CORRECT ANSWER✔✔device that can either heat in the winter or cool in the summer
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degree days - CORRECT ANSWER✔✔a measure of the approximate average yearly temperature difference between the outside and
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the inside in a particular location
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furnace - CORRECT ANSWER✔✔burn either gas or oil to heat air, then distribute throughout the building
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boiler - CORRECT ANSWER✔✔use fuel to heat water, and steam or hot water is used to distribute heat
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upflow furnace - CORRECT ANSWER✔✔return air is supplied at the bottom of the unit and the heated air is delivered to the bonnet
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above the furnace where it's distributed through ductwork
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downflow furnace - CORRECT ANSWER✔✔used in cases where the duct work is in a basement or crawl space and the furnace is locate
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on the first floor
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, horizontal furnace - CORRECT ANSWER✔✔used where headroom is limited, such as in crawl spaces j j j j j j j j j j j j j




compressive refrigeration - CORRECT ANSWER✔✔based on the transfer of heat during the liquification and evaporation of a j j j j j j j j j j j j j j j j




refrigerant
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compressor - CORRECT ANSWER✔✔takes the refrigerant in a gaseous form and compresses it to a liquid j j j j j j j j j j j j j j j




a ton of refrigeration - CORRECT ANSWER✔✔unit used to describe the capacity of a refrigeration system
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direct expansion - CORRECT ANSWER✔✔also called DX system or incremental unit, self contained unit that passes nonducted air,
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which is to be cooled over the evaporator and back into the room (placed in an exterior wall)
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all air system - CORRECT ANSWER✔✔cool or heat spaces by conditioned air alone, heat is transported with supply & return air ducts
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single duct system - CORRECT ANSWER✔✔used in residential and small commercial applications, air is heated and cooled in a
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central furnace or air conditioner and is distributed throughout the building in duct work at a constant volume w/one central thermostat to
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control the furnace
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variable air volume system - CORRECT ANSWER✔✔VAV, air is heated or cooled as required in a central plant and distributed to the
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building at a constant temperature through a single duct, a thermostat in each zone controls a damper that varies the volume of conditioned
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air entering the space to respond to the users needs
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dual duct system - CORRECT ANSWER✔✔high velocity system, provides two parallel ducts, one with hot air and one with cool air,
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streams of air are joined in a mixing box in proportions to suit the temperature requirements of the conditioned space
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reheat constant volume system - CORRECT ANSWER✔✔constant volume system, takes return air and fresh outdoor air and cools and
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dehumidifies the mixture which is distributed in a constant volume at low temperature throughout the building
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absorption cooling - CORRECT ANSWER✔✔produces chilled water and is accomplished by the loss of heat when water evaporates
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economizer cycle - CORRECT ANSWER✔✔allows outdoor air to be used for cooling when temperatures are low enough (adjusts with j j j j j j j j j j j j j j j j j j




dampers)
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multizone system - CORRECT ANSWER✔✔supplies air into a central mixing unit where separate heating and cooling coils produce
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hot and cold air streams, then mixed with dampers controlled by zone thermostats and resulting tempered air is delivered to zones
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all water systems - CORRECT ANSWER✔✔uses a fan coil unit in each conditioned space, fan coils are connected to one or two water
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circuits
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air water induction systems - CORRECT ANSWER✔✔rely on central air to provide humidity control and ventilation air to conditioned
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spaces, used where return air cannot be recirculated (hospitals & laboratories), outside air is supplied and return air is exhausted to the
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exterior
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nuisance - CORRECT ANSWER✔✔legal term meaning that which is dangerous to human life or detrimental to health
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desiccant - CORRECT ANSWER✔✔a material either liquid or solid that absorbs water j j j j j j j j j j j




direct contact water heater - CORRECT ANSWER✔✔heats water by passing hot gasses directly through water
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recuperative gas boiler - CORRECT ANSWER✔✔recovers the sensible and latent heat from the high heat of exhaust flue gases that j j j j j j j j j j j j j j j j j j j




would normally be discharged to the atmosphere
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displacement ventilation - CORRECT ANSWER✔✔an air distribution system in which supply air originates at floor level and rises to j j j j j j j j j j j j j j j j j j




return air grilles in the ceiling
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water loop heat pump - CORRECT ANSWER✔✔compose a heating and cooling system that uses a series of heat pumps for different
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