BPI Study Exam Questions With Verified Answers

BPI Study Exam Questions With Verified Answers What is a BTU? - answerBritish Thermal Unit - the amount of energy required to heat 1 pound of water 1 degrees Fahrenheit Why does warm air rise? - answerWarm air is less dense than cool air What is a thermal boundary? - answerA line or plane defined by insulation and air barrier What is NOT a goal of air leakage control? - answerMeeting code (no code exists for air leakage) What is air leakage OUT of a house called? - answerExfiltration What happens to the neutral pressure plane of a house when you turn on all the exhaust fans? - answerIt would be HIGHER, more of the house is under negative pressure What metric is used to measure a home's performance? - answerCFM50 What units is CFM50 measured in - answerCubic feet per minute at 50 Pascals What is not important in a strategy for reducing air leakage and providing adequate ventilation? - answerSeal the home as tight as possible and make sure windows are adequate What is a big benefit from dense packing cellulose? - answerReduced air infiltration What is found on 90% furnaces and not 80%? - answerDrain for condensate CFM50 measures what? - answerAir tightness level of a building What improvement will consistently give the largest envelope leakage reductions for most houses in the US? - answerAir sealing all attic bypasses What building component, if installed wrong, has a big effect on performance? - answerInsulation Max federal flow rate for faucets to be considered low flow - answer1.5gpm When estimating wall insulation, what measurement is unnecessary? - answerWindow to wall area Upgrading mechanical equipment does what for a house - answerDecreases homes cost of ownerhsip What does a psychrometer measure? - answerWet