A return duct located in a home's attic has become disconnected and pulls 100% of its air from outside the home. What impact will this have on the home? Correct Ans - It will pressurize the home.
What is the purpose of a vapor diffusion retarder in buildings? Correct Ans - It retards the passage of water vapor through the building envelope.
Excessive negative pressure in the building enclosure causes CO production. Correct Ans - False
Siphon Coils are used on ________ installations? Correct Ans - Horizontal
Which of the following is NOT a cause of pressure differences in a home? Correct Ans - Solar Effect
An exhaust fan has a flow rate of 20 CFM. How much air would be moved if the
fan were left on for an entire day? Correct Ans - 28,800 ft3 per day
According to BPI Technical Standards, for buildings with central ventilation fans: Correct Ans - Each fan shall be inspected for effective operation
What is thermal bridging? Correct Ans - Rapid heat transfer through a heat conductor
What is the net area of a wall that is 8' tall, 20' long with a 20 ft2 door and four
10.5 ft2 windows? Correct Ans - 98 ft2
What does the nomenclature F32/85-TX stand for? Correct Ans - Not enough information
Which of the following is NOT something to consider when considering the balance of an HVAC system according to BPI Technical Standards? Correct
Ans - Time of year What is the volume of a wall that is 8' tall, 20' long, and 4" deep? Correct Ans - 53.3 ft3
According to ASME A13.1-2007, a yellow label with black text indicates? Correct Ans - Flammable fluids
Air that is ___________ has 100% relative humidity. Correct Ans - Saturated
What is the temperature change ( T) from -11°F to 65°F? Correct Ans - Δ
76°F
What is the area of the walls of a house if it is 40' long, 20' wide, and 10' tall? Correct Ans - 800 ft2
The percent of moisture absorbed in the air compared to the maximum amount possible is Correct Ans - Relative humidity
What is the net wall area if the wall is 10' tall and 30' wide but has a window 36" by 42"? Correct Ans - 289.5 ft2
What causes a Pressure Delta? Correct Ans - Air movement
In a cold climate, where should the vapor diffusion retarder be facing? Correct Ans - To the inside
What framing technique was common prior to the introduction of platform framing in the 20th century? Correct Ans - Balloon
Which of the following is NOT one of the ways that moisture moves? Correct Ans - Radiation
Leaking supply ducts will: Correct Ans - Depressurize the building
An 8' x 20' hallway has fifteen 32-watt lamps. What is the lumen power density of that space? Correct Ans - 3 w/ft2
Blower door tests should not be done if which of the following are present? Correct Ans - Mold