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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) Answers A and C
C) Removing temperature set point overrides
D) Retraining staff on the BAS functions and programming
E) All of the above

2. What is the uniform series present worth factor (P/A, i%, n) for an annual interest rate of 15% and a lifetime of 20 years?

A) 0.160
B) 6.259
C) 0.214
D) 4.676

3. A 25-kW motor, at full load, drives a centrifugal fan that produces 160,000 liters per second (l/s) of ventilation air. If the fan speed is reduced to a flow rate of 150,000 l/s, what is the new load on the motor?

A) 20.6 kW
B) 30.3 kW
C) 25.0 kW
D) 24.2 kW
E) 15.2 kW

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

5. Which of the following best describes a dead band in controls?

A) The difference between a sensor variable and its set point
B) A system which changes the output of a controller based on how fast a variable is moving from or to a set point
C) A range around a set point with no change in state even though there is a change in sensor input
D) The delay in response of a system to a controlled change
E) A value that has been assigned to a controlled variable

Solutions: