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AEE Certified Energy Manager (CEM) Sample Questions:

1. Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings in a project that upgraded lighting in a large manufacturing plant?

A) Option A - Retrofit isolation: key parameter measurement
B) Option B - Retrofit isolation: all parameter measurement
C) Option E - Stipulated savings
D) Option D - Calibrated simulation
E) Option C - Whole facility measurement

2. Why do electric utility companies transmit power at high voltages?
SELECT THE CORRECT ANSWER

A) Higher voltages are more stable
B) Electrical frequency is more stable
C) Transmission power losses (12R) are less
D) Higher voltages are safer

3. In a PID control system, what is the purpose of the Proportional Gain?

A) Control point
B) Reduces/eliminates offset
C) Senses high load rate
D) Reacts to change

4. According to the institute of Electrical and Electronic Engineers (IEEE) standard 519. "Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems." the maximum total harmonic distortion (THD) for general low voltage systems less than 600 votts) should be:
SELECT THE CORRECT ANSWER

A) Greater than 1%
B) Less than 5%
C) Less than 20%
D) Less than 10%
E) Less than 1%

5. In an ammonia-water absorption chiller, what material is the refrigerant?

A) Water
B) Some form of fluorocarbon
C) Ammonia
D) Lithium bromide

Solutions: