BPI Building Analyst Test Exam Questions With Verified Answers

BPI Building Analyst Test Exam Questions With Verified Answers What % of air is oxygen? - answer21% what is a heating degree day? - answereach degree that the average daily temperature is below the base temperature (65 degrees F) is one heating degree day. HDD What is a cooling degree day? - answerair temperature differences btwn the outdoors and 78 degrees F over the hot season If the high was 60 degrees F and the low was 30 degrees F, how many HDDs occured? - answerbase temp-delta T so 60+30 divided by 2=45. 45 is the delta T. so 64(which is the base temp always) minus 45 =20 HDDs Heat will always move from - answerhot to cold (more to less) 2nd law of thermodynamics pressure will always move from - answerhigh to low (more to less) 2nd law of thermodynamics moisture will always move from - answerwet to dry (more to less) 2nd law of thermodynamics what 2 things are needed ofr air to move? - answerpath and change in pressure if condensation occurs on a window, what 2 things must be true? - answerthe window surface is below dew point and there is moisture in the air if air is heated, does the relative humidity go up or down? - answerdown what is the definition of the building envelope? - answerany part that creates a separation of indoor and outdoor spaces. this is where the thermal and pressure boundaries will be located. what is a vapor diffusion retarder? - answervapor barrier what natural force is a vapor diffustion retarder attempting to stop? - answerdiffusion define vapro diffusion - answerflow of water vapor through a solid material what doea sling psychrometer measure? - answerrelative humidity how many thermometers does a sling psychrometer have to measure RH? - answertwo what is the soffit? - answerunder side of the roof overhang or a small lowered ceiling like above cabinets or a shower what does a blower door measure? - answerair leaks, measures the square inches of holes in a building what is the single most important thing to do if attempting to control moisture in the home? - answercontrol air flow/leaks if a house has 50 CFM going out through the bath exhaust,how many CFM must be coming back in? - answer50 CFM, for every cfm in, there is 1cfm out when air sealing a home you should always start where? - answerthe top and bottom (some answers say the top is the top priority and some say top AND bottom) because of stack effect define stack effect - answerdraft established in a building from air infiltrating low and exfiltrating high what are four reasons to fix the hole around loose HVAC boots in the floor? - answer1. IAQ (indoor air quality) 2. comfort/cost 3. effective air flow 4. to maintain pressure flows 5. prevent moisture from entering from crawlspace 6. prevent harmful gases/vapors/pollutants from entering home name 3 forms of heat transfer - answerconduction, convection, radiation what has more potential energy, propane or natural gas? - answerpropane what does MSDS mean and how is it used? - answermaterial safety data sheet, and shows mfg and product infomation health and safety issues what is the typical human comfort range in RH? - answer40-60% define infiltration - answerthe inflow of outdoor air into the indoors which is accompanied by equal outflow of air from the indoors to the outdoors define exfiltration - answerair flowing out of a residence from the conditioned space through the shell to the outside define ventilation - answermovement of air through an area for the purpose of removing moisture, air pollution and unwanted heat