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AEE Certified Energy Manager (CEM) Sample Questions:

1. An outdoor parking area has 25 light poles. Each pole has a 420 Watt (ballast included) high-pressure sodium (HPS) luminaire. The parking area lights are illuminated 4,500 hours per year and the electricity cost is $0.08
/kWh. What is the annual energy cost reduction if each luminaire is replaced with a 220-Watt (driver included) LED luminaire?

A) $1,200/yr
B) $1,500/yr
C) $1,800/yr
D) $2,600/yr
E) $2,200/yr

2. In general, which of the following is the least expensive and easiest way to finance an energy project?

A) Equity
B) Performance contract
C) Debt

3. Which type of lighting control technique operates in "manual on" and "auto-off mode, and can be used in situations where there is brief occupancy that do not need lights on?

A) Microphonics technology
B) Occupancy sensor
C) Photocell control
D) PIR/Microphonics dual technology
E) Vacancy sensor

4. Using an interest rate of 15%, an energy project has a net-present value (NPV) of $3,500. Which statement is true about the project's internal rate of return (IRR)?

A) IRR < 0%
B) IRR > 15%
C) IRR = 15%
D) IRR < 15%

5. Lighting systems operate with a certain recoverable light loss factor. Control systems with photocell sensor inputs combined with dimming ballasts can be used to regulate dimming levels to maintain a continuous light level in the work space. Which of the following best describes this type of control?

A) Demand-limiting controller
B) Two-position controller
C) Closed-loop controller
D) Open-loop controller

Solutions: