Certified Energy Auditor Certification Building Envelope and Lighting 2

Question 1

Which window property describes the fraction of incident solar radiation that passes through the glazing system as heat?

Accepted Answer

Solar heat gain coefficient (SHGC)

Answer

Solar heat gain coefficient (SHGC) measures the fraction of solar radiation admitted through a window as heat gain, on a scale of 0 to 1.

Question 2

A building's thermal mass is most beneficial in which climate condition?

Accepted Answer

Hot-dry climates with large diurnal temperature swings

Answer

Thermal mass is most effective in hot-dry climates where large day-night temperature swings allow the mass to absorb heat during the day and release it during cooler nights.

Question 3

What is the primary purpose of a vapor retarder in a wall assembly?

Accepted Answer

Control the diffusion of water vapor to prevent condensation within the assembly

Answer

A vapor retarder limits water vapor diffusion through the building envelope, preventing condensation within the wall assembly that can cause mold and structural damage.

Question 4

In lighting energy audits, what does the term 'lamp lumen depreciation' (LLD) describe?

Accepted Answer

The decrease in lamp light output over its operating life

Answer

Lamp lumen depreciation (LLD) is the gradual reduction in light output that occurs as a lamp ages over its operating life, used in lighting design calculations.

Question 5

Which insulation material has the highest R-value per inch?

Accepted Answer

Closed-cell spray polyurethane foam

Answer

Closed-cell spray polyurethane foam provides approximately R-6 to R-7 per inch, the highest thermal resistance per inch of common insulation materials.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Building Envelope and Lighting 2