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AEE Certified Energy Manager (CEM) Sample Questions:

1. Periodic commissioning of a building automation system (BAS) might include which of the following?

A) Verify controls are still responsive to the BAS
B) Retraining staff on the BAS functions and programming
C) All of the above
D) Removing temperature set point overrides
E) Answers A and C

2. What type of heat transfer is reduced by adding insulation to the inside surface of a wall?

A) Conduction
B) Radiation
C) Convection

3. A cooling tower delivers 29°C water to a central chilled water plant. The cooling tower is capable of delivering water to the chilled-water plant with a 6°C approach temperature to the ambient wet bulb temperature. Using this information, what type of control strategy would you recommend be added to the cooling tower operation to save additional energy?

A) Condenser-water temperature reset
B) Static-pressure reset
C) Chiller demand limiting
D) Chilled-water temperature reset

4. An energy-saving project costs $540,000. The project will have maintenance costs of $25,000 per year. The energy savings from the project are $160,000 per year. The project has a life of 10 years with no salvage value. The minimum attractive rate of return (MARR) is 10%. Using end-of-year cash flows, calculate the net- present value (NPV) of the project.

A) $456,254
B) $289,575
C) $154,657
D) $311,556

5. Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

A) 1,955 CDD/yr
B) 2,975 CDD/yr
C) 1,845 CDD/yr
D) 2,555 CDD/yr
E) 2,250 CDD/yr

Solutions: