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AEE Certified Energy Manager (CEM) Sample Questions:

1. What is the main cause of low power factor?

A) Computers and electronic equipment
B) Harmonics
C) Solar flares
D) Low-load induction motors
E) Fluorescent lighting

2. A desk lamp is located inside a windowless office. The office is heated during the winter and cooled during the summer. When the lamp is switched on, how much of the energy consumed by the lamp becomes heat in the office space?

A) 100%
B) 25%
C) 120%
D) 80%

3. What is a common method to reduce the impact of voltage imbalance?

A) Rebalance single-phase loads
B) Reverse phase connections on three-phase motors
C) Install harmonic filters
D) Install capacitors to improve power factor on three-phase loads

4. Lighting systems operate with a certain recoverable light loss factor. Control systems with photocell sensor inputs combined with dimming ballasts can be used to regulate dimming levels to maintain a continuous light level in the work space. Which of the following best describes this type of control?

A) Open-loop controller
B) Two-position controller
C) Demand-limiting controller
D) Closed-loop controller

5. How can you tell if steam traps in a steam distribution system may NOT be working correctly?

A) All of the above
B) Robust flash steam rising from condensate receiver tank vent pipes
C) Rapid chattering of disk steam traps
D) An increase in make-up water requirements relative to steam demand
E) No sound from inverted bucket steam traps

Solutions: