Certified Energy Auditor Certification Certified Energy Auditor Building Envelope and Lighting Questions and Answers 3

Question 1

An energy auditor uses an infrared camera and detects cold spots on an interior wall during winter. What does this most likely indicate?

Accepted Answer

Missing or compressed insulation within the wall cavity

Answer

Cold spots on interior walls during heating season typically reveal areas where insulation is missing, compressed, or has settled, allowing greater heat loss.

Question 2

What is the recommended maintained illuminance level for a typical US office workspace per IES standards?

Accepted Answer

30-50 foot-candles

Answer

IES recommends approximately 30-50 foot-candles (300-500 lux) of maintained illuminance for general office tasks.

Question 3

Which building envelope component typically contributes the most to air leakage in commercial buildings?

Accepted Answer

Roof-to-wall connections and penetrations

Answer

Roof-to-wall junctions, mechanical penetrations, and similar transitions are typically the largest sources of uncontrolled air leakage in commercial buildings.

Question 4

What is the primary advantage of LED lighting over fluorescent lighting in an energy audit recommendation?

Accepted Answer

LEDs have significantly longer rated life and higher efficacy

Answer

LEDs offer substantially longer operational life and higher luminous efficacy compared to fluorescent sources, resulting in lower energy and maintenance costs.

Question 5

During an energy audit, an auditor measures a wall assembly with R-13 cavity insulation and R-5 continuous exterior insulation. What is the approximate total R-value of the insulation components?

Accepted Answer

R-18

Answer

Thermal resistances in series are additive, so R-13 plus R-5 yields a combined insulation R-value of approximately R-18.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Certified Energy Auditor Building Envelope and Lighting Questions and Answers 3