BPI Diagnostic Testing & Performance Evaluation 2

Question 1

During a blower door test, what does the metric 'CFM50' specifically measure?

Accepted Answer

Airflow in cubic feet per minute at 50 Pascals of pressure difference

Answer

CFM50 is the volumetric airflow rate (in cubic feet per minute) required to maintain a 50 Pascal pressure difference across the building envelope.

Question 2

Which diagnostic tool is primarily used to detect moisture intrusion and thermal anomalies in building assemblies?

Accepted Answer

Infrared camera

Answer

Infrared (IR) cameras detect surface temperature differences that indicate moisture intrusion, missing insulation, or air leakage paths in building assemblies.

Question 3

What is the purpose of the 'house pressure' test conducted during combustion safety testing?

Accepted Answer

To determine if appliances can backdraft under worst-case depressurization

Answer

The worst-case house pressure test simulates maximum depressurization conditions to determine if combustion appliances are at risk of backdrafting.

Question 4

When performing duct leakage testing, a 'Duct Blaster' pressurizes the duct system to what standard test pressure?

Accepted Answer

25 Pascals

Answer

Duct leakage testing is standardized at 25 Pascals of pressure difference across the duct system walls.

Question 5

What does a negative pressure reading inside a mechanical room indicate during worst-case combustion safety testing?

Accepted Answer

The room is depressurized, increasing backdraft risk for combustion appliances

Answer

A negative pressure in the mechanical room means it is depressurized relative to outdoors, which can draw combustion gases back into the living space.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Diagnostic Testing & Performance Evaluation 2