BPI Health, Safety & Energy Efficiency 4

Question 1

What is the primary function of a ground vapor retarder in a vented crawl space?

Accepted Answer

To block moisture evaporation from soil into the crawl space

Answer

A ground vapor retarder (typically 6-mil poly) blocks moisture evaporation from the soil, reducing humidity and preventing structural damage.

Question 2

Which condition makes an atmospherically vented combustion appliance most susceptible to backdrafting?

Accepted Answer

Negative building pressure relative to outdoors

Answer

Negative indoor pressure relative to outdoors overpowers the natural draft, pulling combustion gases back down the flue into the living space.

Question 3

Per BPI standards, what is the action level for radon concentration that requires mitigation before energy work proceeds?

Accepted Answer

4 pCi/L

Answer

The EPA and BPI action level for radon is 4 pCi/L; concentrations at or above this require mitigation, especially before air sealing.

Question 4

What type of ventilation control strategy is required by ASHRAE 62.2 for whole-house mechanical ventilation?

Accepted Answer

Continuous or controlled intermittent ventilation meeting minimum airflow rates

Answer

ASHRAE 62.2 requires continuous or controlled intermittent mechanical ventilation that delivers the minimum airflow rate determined by floor area and occupants.

Question 5

Which health hazard is specifically associated with older homes having insulation or pipe wrapping that contains friable material?

Accepted Answer

Asbestos fiber inhalation

Answer

Friable asbestos-containing materials in older homes can release carcinogenic fibers when disturbed during weatherization work.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Health, Safety & Energy Efficiency 4