Certified Energy Auditor Certification Energy Audit Data Analysis 2

Question 1

When analyzing utility bills for an energy audit, what does a high load factor indicate?

Accepted Answer

Electricity consumption is relatively consistent throughout the billing period

Answer

A high load factor (kWh / (peak kW × hours)) means demand is steady relative to peak, indicating consistent utilization throughout the billing period.

Question 2

A facility's energy use intensity (EUI) is 120 kBtu/ft²/yr. The national median for its building type is 80 kBtu/ft²/yr. What does this indicate?

Accepted Answer

The facility uses 50% more energy per square foot than the median

Answer

An EUI of 120 vs. a median of 80 means the facility consumes 50% more energy per square foot than the typical building of its type.

Question 3

What is the primary purpose of degree-day normalization in energy data analysis?

Accepted Answer

To remove the effect of weather variation when comparing energy use across periods

Answer

Degree-day normalization adjusts energy consumption data to account for weather differences, enabling fair year-to-year or site-to-site comparisons.

Question 4

During regression analysis of a building's energy use, the R² value is 0.95. What does this mean?

Accepted Answer

95% of the variation in energy use is explained by the independent variable(s) in the model

Answer

An R² of 0.95 means the regression model's independent variables (e.g., degree-days) explain 95% of the variance in the energy consumption data.

Question 5

An energy auditor finds that a building's electricity consumption drops significantly on weekends. This pattern most likely indicates:

Accepted Answer

Process or occupancy-related loads that cease during non-business hours

Answer

Significant weekend consumption drops typically reflect occupancy-driven loads such as lighting, plug loads, and HVAC setback during unoccupied periods.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Energy Audit Data Analysis 2