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AEE Certified Energy Manager (CEM) Sample Questions:

1. According to ISO 50001. when performing internal audits on the energy management system in an organization the internal auditor should do which of the following?
SELECT THE CORRECT ANSWER

A) Assess actual activities as practiced against what the written procedures state
B) All of the above
C) Review the written procedures related to the area under audit
D) Look for opportunities for energy improvement and to minimize bureaucracy in the energy management system
E) Focus on the areas of significant energy use

2. Problems Caused by Harmonic Distortion
Which of the following problems is unlikely to be caused by harmonic distortion?
SELECT THE CORRECT ANSWER

A) "Nuisance" tripping of circuit breakers
B) Circulating currents in motor shafts
C) Torque pulsation in motors
D) Degraded power factor C. Lighting "flicker"

3. 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) 50,000 calendar hours
B) 18,000 operational hours
C) 50,000 operational hours
D) 20,000 calendar hours
E) 1,000 operational hours

4. A controlled valve is full closed when it gets a signal of 4 mA. The valve is full open when it gets a signal of
20 mA. With a control signal of 8 mA, what is the valve position?

A) 25% open
B) 45% open
C) 75% open
D) 12.5% open
E) 82% open

5. The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that ambient air is fed directly to the air compressor's intake, what impact can be expected on the air compressor's energy requirement?

A) Decrease energy use by 7.6%
B) No measureable change in energy use
C) Increase energy use by 3.8%
D) Increase energy use by 7.6%
E) Decrease energy use by 3.8%

Solutions: