Certified Energy Auditor Certification Certified Energy Auditor Data Collection and Analysis Questions and Answers 3

Question 1

What is the recommended method for measuring the air infiltration rate of an existing commercial building during an energy audit?

Accepted Answer

Blower door depressurization test

Answer

A blower door test directly measures the building's air leakage rate by pressurizing or depressurizing the structure and quantifying airflow.

Question 2

An auditor discovers that a building's energy use intensity (EUI) is 120 kBtu/sq ft/year while the ENERGY STAR median for the same building type is 85 kBtu/sq ft/year. How should this finding be categorized?

Accepted Answer

The building has moderate energy savings potential of approximately 29%

Answer

An EUI of 120 versus a median of 85 indicates roughly 29% savings potential, representing a meaningful energy conservation opportunity.

Question 3

Which instrument is most appropriate for measuring the combustion efficiency of a natural gas boiler during a field audit?

Accepted Answer

Portable flue gas analyzer measuring O2 and CO

Answer

A portable flue gas analyzer measures excess oxygen and carbon monoxide in the flue, which are the primary indicators needed to calculate combustion efficiency.

Question 4

When analyzing time-of-use electricity billing data, an auditor notices that 40% of energy consumption occurs during on-peak periods. What type of energy conservation measure should be prioritized?

Accepted Answer

Implementing load shifting or demand response strategies

Answer

High on-peak consumption indicates significant cost savings potential through load shifting strategies that move energy use to lower-cost off-peak periods.

Question 5

What is the most reliable method for determining the actual operating efficiency of a chiller in the field?

Accepted Answer

Measuring condenser and evaporator water temperatures and flow rates along with power input

Answer

Actual chiller efficiency requires simultaneous measurement of cooling output (from water temperatures and flow) and electrical input under real operating conditions.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Certified Energy Auditor Data Collection and Analysis Questions and Answers 3