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AEE Certified Energy Manager (CEM) Sample Questions:

1. What is a common cause of poor power quality?

A) Incandescent lighting
B) Partially loaded induction motors
C) Electronic equipment, such as personal computers
D) Synchronous motors
E) Natural gas turbine power generation by utilities

2. Which of the advantages listed below, makes an ice TES system more preferred over a water TES system, when a load shifting strategy is considered?

A) Ice-storage systems require lower maintenance due to lower pumping volume
B) Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
C) Ice-storage systems operate with a higher coefficient of performance (COP)
D) Water-storage systems require smaller storage tanks since water has a higher density than ice

3. A new lighting system costs $60,000. The new lighting system has a 15-year life and the minimum required rate of return (MARR) is 15%. How much must the new lighting system save to be life-cycle cost effective?

A) $12,556/year
B) $33,200/year
C) $27,090/year
D) $15,650/year
E) $10,260/year

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

5. A facility owner is considering installing a new chiller. The installed project cost will be $300,000. The annual savings from the energy-saving project will be $45,000 for the 20-year life of the chiller. If an energy- service company requires a minimum 20% return on investment (pre-tax), will the energy-service company agree to finance this project?

A) Yes
B) No

Solutions: