AEE CEM : Certified Energy Manager (CEM)

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AEE Certified Energy Manager (CEM) Sample Questions:

1. What type of heat exchanger is commonly built into AHU's or large RTU's, can be used to recover heat from exhaust air, and may cause cross-contamination between heat exchange fluids?
Select the Correct Answer

A) Heat pump
B) Dessiccant heat wheel
C) Run-around coil
D) Heat pipe
E) Plate and frame

2. What will commonly be the most appropriate expected lamp life for a fluorescent lamp fitted with an occupancy sensor, that is operational in a school?
SELECT THE CORRECT ANSWER

A) 20,000 calendar hours
B) 50,000 calendar hours
C) 1,000 operational hours
D) 50,000 operational hours
E) 18,000 operational hours

3. Which of the following instruments is most useful for tracking long-term boiler performance?

A) The feedwater temperature sensor
B) The drum water level gauge
C) The boiler room ambient temperature sensor
D) The pressure gauge
E) The exhaust stack temperature sensor

4. Which problems can be caused by poor power quality?

A) All of the above
B) Circuit breakers tripping
C) Equipment overheating
D) Induction motors running backwards
E) Answers B and C

5. 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) $289,575
B) $311,556
C) $456,254
D) $154,657

Solutions: