Pressure Diagnostics for Auditors

MT Weatherization Training Center's "Pressure Diagnostics" Webinar Quiz

To gain BPI credit for the webinar, completion of this quiz is required. If you would like for us to submit for credit for you, please remember to provide your BPI number! A 70% or higher is required to receive BPI credits.

Question Title

* 1. Address

First and Last Name *

Agency Name *

BPI Number (if applicable)

City/Town *

State/Province *

Email Address *

Phone Number

Question Title

* 2. What is the standard blower door pressure that auditors use for measuring air leakage in a home?

a. -25 pascals

b. -50 pascals

c. -50 inches of water

d. -50 inches of mercury

Question Title

* 3. What is the best interpretation if a zone test of a bedroom shows -45 pascals with respect to the rest of the house during a -50 pascals blower door test?

a. The room is almost totally inside the house with very little leakage to outdoors.

b. The room is almost totally outside the house pressure boundary.

c. The door to the room should be undercut.

d. Both b and c.

Question Title

* 4. If a zone test conducted from the living space into a well-ventilated attic shows -48 pascals with the blower door running, what do we probably know about the ceiling air barrier?

a. It has numerous air leaks.

b. It is probably very cold.

c. It is very well sealed.

d. The house may have a rodent problem.

Question Title

* 5. When performing your walk around during an audit, what design features may suggest that you should perform pressure diagnostics?

a. Cantilevered floors.

b. Rooms over garages.

c. Return and supply registers at the ceiling with ducting in the attic.

d. All of the above

Question Title

* 6. Why is it helpful to run the blower door when doing an IR scan?

a. Moving air has a higher specific heat and shows up better in the IR camera.

b. The pressure helps warm outdoor air when it enters building cavities.

c. Air moved by the blower door helps disclose the presence of outdoor air in building cavities.

d. The blower door reduces the chance of back-drafting combustion appliances.

Question Title

* 7. If the door is shut to the CAZ when the air handler comes on, and the CAZ goes from -3.8 pascals to -6.8 pascals, what does this tell us about the supply and return system?

a. There may be leaks in the return ducting in the CAZ.

b. There may be supply leaks in the CAZ.

c. The central vacuum system is creating a bypass.

d. The return ducting is connected to the rim joist.

Question Title

* 8. Besides heat loss, what is another negative effect of air leakage?

a. Moisture transport into concealed spaces.

b. Smells of burnt food moving to the outdoors.

c. Over-heated rooms at the far end of the house.

d. Poor TV reception and interference with wireless signals.

Question Title

* 9. What data do you need for a calculation of ASHRAE-required ventilation?

a. The final CFM at 50 pascals for the house.

b. The number of bedrooms.

c. The exhaust fan flow in CFM.

d. All of the above

Question Title

* 10. What have you learned if you get a pressure pan reading of -20 pascals while running the blower door at -50 pascals?

a. That the ducting is well sealed in this area.

b. That the ducting is poorly sealed in this area.

c. That there is a restriction in the duct in this area.

d. That the house needs more negative pressure.

Question Title

* 11. Why do residents often not notice air leaking out of high openings in the home?

a. They don’t pay attention to the ceiling area.

b. The heated air is going away and does not create a cold draft at that location.

c. High leaks are not that important in most homes.

d. The air flow through high leaks is often blocked by normal pressure boundaries.

Question Title

* 12. Do you want to be added to our email newsletter list (no spam, we promise)?

Yes, please!

No, thank you.

I am already subscribed.