BPI Moisture Management 5

Question 1

A building with an exhaust-only ventilation system experiences negative pressure. What moisture-related risk does this create?

Accepted Answer

Outdoor humid air is drawn in through envelope cracks, raising indoor moisture

Answer

Exhaust-only systems depressurize the building, drawing unconditioned outdoor air through uncontrolled pathways that may carry significant humidity.

Question 2

What is the purpose of weep holes in a brick veneer wall system?

Accepted Answer

To drain bulk water that penetrates behind the veneer to the exterior

Answer

Weep holes at the base of brick veneer allow water that enters the cavity to drain out rather than accumulate against the backup wall.

Question 3

Which type of insulation is MOST resistant to moisture damage and maintains its R-value when exposed to liquid water?

Accepted Answer

Closed-cell spray foam

Answer

Closed-cell SPF is water-resistant, does not absorb liquid water, and retains its thermal performance even in damp environments.

Question 4

In hot-humid climates, what is the MOST common error made when installing vapor retarders?

Accepted Answer

Installing the retarder on the exterior warm-in-summer side, trapping moisture during cooling season

Answer

In hot-humid climates, placing an impermeable retarder on the exterior traps moisture driven inward by summer humidity against the cooled interior wall.

Question 5

What term describes the process by which concrete or masonry foundation walls transmit ground moisture to interior surfaces without bulk water intrusion?

Accepted Answer

Wicking via capillary transport

Answer

Capillary wicking draws liquid water from saturated soil through the porous concrete or masonry to the interior surface.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Moisture Management 5