Certified Energy Auditor Certification Data Collection and Analysis 3

Question 1

What does a power quality analyzer measure that a standard clamp meter cannot?

Accepted Answer

Harmonic distortion and power factor

Answer

Power quality analyzers capture waveform distortion (THD), power factor, and transients that are invisible to basic clamp meters.

Question 2

An auditor collects spot measurements of compressed air pressure at multiple points in a distribution system. What pattern indicates excessive pressure drop?

Accepted Answer

Pressure at end-use points significantly lower than at the compressor outlet

Answer

A large pressure differential between the compressor outlet and end-use points signals pipe friction losses or blockages that waste energy.

Question 3

Which statistical method is best suited for determining the relationship between outdoor air temperature and a building's chilled water consumption?

Accepted Answer

Linear regression analysis

Answer

Linear regression quantifies the correlation between a dependent variable (chilled water use) and an independent variable (outdoor temperature).

Question 4

When inventorying HVAC equipment for an energy audit, which nameplate value is most critical for calculating annual energy consumption?

Accepted Answer

Full-load rated input power (kW or hp)

Answer

Full-load rated input power combined with operating hours enables calculation of annual energy use.

Question 5

A steam trap survey reveals 15% of traps are failed-open. What does this indicate for the energy audit?

Accepted Answer

Live steam is blowing through, causing direct energy loss

Answer

Failed-open steam traps allow live steam to pass continuously into the condensate return, wasting boiler fuel.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Data Collection and Analysis 3