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AEE Certified Energy Manager (CEM) Sample Questions:

1. A 100-kW packaged engine-generator combined heat and power (CHP) system has the specifications listed below. What is the annual purchased fuel cost for the CHP system, assuming that the CHP is electrical output limited and operates at full electrical load all year?

SELECT THE CORRECT ANSWER

A) $32,668/yr
B) $58,300/yr
C) $43,776/yr
D) $52,222/yr
E) $28,900/yr

2. The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient (outside) air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that the cooler outside air is fed directly to the air compressor's intake, the compressor's energy requirement will now be expected to:
SELECT THE CORRECT ANSWER

A) Increase by 7.6%
B) Increase by 3.8%
C) Decrease by 7.6%
D) Decrease by 3.8%
E) Remain the same

3. Which of the following steam turbines will likely not provide steam output at a useable temperature for industrial processes?

A) Back-pressure turbine
B) Answers A and B
C) Condensing turbine
D) Extraction turbine

4. Which of the following controls can optimize the operation of lighting systems?

A) Dimming ballasts
B) All of the above
C) Occupancy sensors
D) Photocells
E) Timer

5. Which motor parameter is the most difficult to determine accurately?
SELECT THE CORRECT ANSWER

A) Operating load factor using slip calculations
B) Operating (rotating) speed
C) Output power capacity
D) Input power

Solutions: