Certified Energy Auditor Certification Building Envelope and Lighting 5

Question 1

What is the thermal resistance (R-value) equivalent of a U-factor of 0.25 BTU/hr·ft²·°F?

Accepted Answer

R-4.0

Answer

R-value = 1 ÷ U-factor = 1 ÷ 0.25 = 4.0; R-value and U-factor are reciprocals of each other.

Question 2

Which lighting application is best suited for T5HO fluorescent lamps rather than standard T8 lamps?

Accepted Answer

High-bay industrial spaces with ceilings above 20 feet

Answer

T5HO (high output) lamps produce significantly more light output per lamp, making them well-suited for high-bay industrial applications where longer throw distances are needed.

Question 3

Slab-on-grade edge insulation is primarily intended to reduce heat loss through:

Accepted Answer

Conduction through the slab perimeter exposed to outdoor temperatures

Answer

Slab perimeter (edge) insulation addresses conduction losses at the slab edge where the concrete is directly exposed to cold outdoor temperatures, which is the primary heat loss path.

Question 4

Which metric is used to quantify the air leakage performance of windows and doors under standardized test conditions?

Accepted Answer

Air leakage rate (AL) in CFM/ft²

Answer

Air leakage rate (AL), expressed in CFM per square foot of frame area at a standard pressure difference, is the NFRC metric for rating window and door airtightness.

Question 5

A building has 200 fixtures each with two 32W T8 lamps and 88% efficient ballasts. What is the actual connected lighting load?

Accepted Answer

14.5 kW

Answer

Total lamp wattage = 200 × 2 × 32W = 12,800W; ballast factor increases this: 12,800W ÷ 0.88 = 14,545W ≈ 14.5 kW.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Building Envelope and Lighting 5