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AEE Certified Energy Manager (CEM) Sample Questions:

1. If outside air has a temperature of 25°C dry bulb and 15°C wet bulb, what is the enthalpy of the air?

A) 42 kJ/kg
B) 52 kJ/kg
C) 32 kJ/kg
D) 62 kJ/kg

2. When comparing two similar facilities, you see that the facility with newer, higher-efficiency equipment has a higher energy-use index [EUI] (kJ/m²-yr). What might be the cause?

A) The facility with the lower EUI is in need of commissioning
B) The facility with the higher efficiency equipment should have a higher EUI
C) The facility with the lower EUI requires a performance contract
D) The facility with the higher EUI is in need of commissioning
E) The facility with the higher EUI requires a supervisory control and data acquisition (SCADA) system

3. If a boiler cycles on and off too frequently, what control can you adjust to reduce the number of times a boiler cycles on and off?

A) Increase the controller set point
B) Increase the controller differential
C) Reduce the controller differential

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) $311,556
C) $456,254
D) $289,575

5. A 55-kW motor at full load is used to drive a pump that generates 50 meters of head while pumping water at a rate of 5,000 liters per minute. Calculate the pump efficiency.

A) 88%
B) 74%
C) 62%
D) 58%

Solutions: