Certified Energy Auditor Certification Certified Energy Auditor Energy Audit Data Analysis Questions and Answers 2

Question 1

When performing a regression analysis on building energy consumption, which variable is most commonly used as the independent variable?

Accepted Answer

Heating degree days

Answer

Building square footage

Answer

Number of occupants

Answer

Electricity rate

Question 2

What does a Coefficient of Determination (R-squared) value of 0.92 indicate in an energy baseline model?

Accepted Answer

92% of energy variance is explained by the model

Answer

The model has a 92% chance of being correct

Answer

Energy use will decrease by 92%

Answer

The building operates at 92% efficiency

Question 3

During an energy audit, you discover that a building's Energy Use Intensity (EUI) is 120 kBtu per square foot per year. Compared to the CBECS median for office buildings, this value is:

Accepted Answer

Above average, indicating potential for improvement

Answer

Below average, indicating good performance

Answer

Exactly at the national median

Answer

Too low to be accurate

Question 4

Which statistical method is most appropriate for identifying abnormal energy consumption patterns in interval meter data?

Accepted Answer

CUSUM analysis

Answer

Simple averaging

Answer

Peak demand calculation

Answer

Power factor correction

Question 5

When normalizing energy data for weather, what is the primary purpose of using a change-point model instead of a simple linear regression?

Accepted Answer

To account for different heating and cooling energy relationships

Answer

To simplify the calculation process

Answer

To eliminate the need for weather data

Answer

To reduce the number of data points required

Question 6

An energy auditor collects 12 months of utility bill data and finds the coefficient of variation of the root mean square error (CV-RMSE) is 28%. According to ASHRAE Guideline 14, this baseline model is:

Accepted Answer

Not acceptable for monthly data

Answer

Acceptable for monthly data

Answer

Acceptable for hourly data only

Answer

Not enough information to determine