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BPI questions and answers certified 2024
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BPI questions and answers certified 2024
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BPIHeating Degree Days - correct answer ✔The number of degrees that a day's
average temperature is below 65o Fahrenheit (18o Celsius), which is the
temperature below which buildings need to be heated
Adding total HDDs or CDDs help us compare heating and cooling
requirements for different geographic locations
Outdoor Design Temperature - correct answer ✔The temperature at which
an HVAC system is designed to operate and maintain the temperature 99% of
the time
Cooling Degree Days - correct answer ✔A cooling degree day (CDD) is a
measurement designed to quantify the demand for energy needed to cool a
building. It is the number of degrees that a day's average temperature is
above 65o Fahrenheit (18o Celsius), which is the temperature above which
buildings need to be cooled.
Convection - correct answer ✔The transfer of heat by the movement of a
fluid or gas. From one area to another. Energy waste. Due to temperature
gradients
Conduction - correct answer ✔Heat transfer through a solid. Most insulations
designed to block heat transfer by conduction. Heat tranfers from hot to cold
by conduction until equilibrium
Radiation - correct answer ✔The direct transfer of energy by electromagnetic
waves without a medium
, Convective Loops - correct answer ✔Air on warm side rise, on cool side falls.
Interferes with thermal barrier. Occurs in attics, eves cantilever.
Relative humidity - correct answer ✔the percentage of water vapor in the air
compared to the maximum amount the air could hold. As the air cools, RH
increases.
Absolute Humidity - correct answer ✔The mass of water vapor contained in
a certain volume of air
Dew Point - correct answer ✔the temperature at which the water vapor in the
air becomes saturated and condensation begins. 100% RH
Wet Bulb Temperature - correct answer ✔The wet-bulb temperature is the
temperature read by a thermometer covered in water-soaked cloth over which
air is passed. At 100% relative humidity, the wet-bulb temperature is equal to
the air temperature and is lower at lower humidity
Moisture Movement - correct answer ✔#1 cause of structural failure.
Moverment occurs through:
-Simple air flow
-capillary action (in foundation walls of a damp basement
Source control is the best way to stop it
Bulk Moisture - correct answer ✔Roof leaks
Plumbing leaks
Foundation leaks
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