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AEE CEM Exam Syllabus Topics:

AEE Certified Energy Manager (CEM) Sample Questions:

1. Which type of lighting control technique operates in "manual on" and "auto-off mode, and can be used in situations where there is brief occupancy that do not need lights on?

A) Occupancy sensor
B) PIR/Microphonics dual technology
C) Vacancy sensor
D) Microphonics technology
E) Photocell control

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

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

3. A three phase, 380-volt system, has the following voltage measurements:
Va = 375 volts
Vb = 380 volts
Vc = 391 volts
Calculate the percent voltage imbalance.

A) 3.4%
B) 6.2%
C) 5.5%
D) 1.1%
E) 2.4%

4. 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) 58%
B) 74%
C) 62%
D) 88%

5. A cooling tower delivers water to a chilled-water plant at 21°C. The outside ambient air conditions are 19°C dry bulb, 50% relative humidity. Using the psychrometric chart, what is the approach temperature of the cooling tower outlet water temperature to the ambient air wet-bulb temperature?
SELECT THE CORRECT ANSWER

A) 6°C
B) 4°C
C) 8°C
D) 10°C

Solutions: