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AEE Certified Energy Manager (CEM) Sample Questions:

1. What is the definition of lamp life for a fluorescent lamp?

A) The time at which lumen output has reduced by 50%
B) The time at which lumen output has reduced to 70% of the initial light output
C) The time at which 50% of a large sample of lamps have failed
D) The time at which 70% of a large sample of lamps have failed
E) The time at which lamps begin to fail

2. An outdoor parking area has 25 light poles. Each pole has a 420 Watt (ballast included) high-pressure sodium (HPS) luminaire. The parking area lights are illuminated 4,500 hours per year and the electricity cost is $0.08
/kWh. What is the annual energy cost reduction if each luminaire is replaced with a 220-Watt (driver included) LED luminaire?

A) $1,200/yr
B) $2,600/yr
C) $1,800/yr
D) $2,200/yr
E) $1,500/yr

3. A facility has the thermal cooling load profile shown in the table below. The utility rate traffic has an no-peak time-of-use period that begins at 10:00 a.m ends at 7:00 p.m. What chiller capacity (output) is required for a load-leveling operating strategy?

[Question from the previous image, which was about chiller capacity for load leveling, but the table was missing]

A) 4.0 GJ/h
B) 8.0 GJ/h
C) 5.0 GJ/h
D) 7.0 GJ/h

4. What type of passive heat exchanger can wrap around an evaporator coil to precool entering air and reheat the air after the cooling coil without adding more moisture to the supply air stream?

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

5. Which of the following statements best describe Demand Control Ventilation (DVC) in Building Automation Systems?

A) It satisfies indoor ventilation rates by preconditioning outdoor air with the exhaust air to decrease energy cost during cold, warm, or humid weather
B) It's a prescriptive procedure in which outdoor air intake rates are calculated based on the energy cost method that compares a proposed building design to a base annual energy cost design
C) It's a building standard for enclosed spaces in which biological, chemical, and physical contaminants are considered to meet thermal comfort requirements
D) It's an active evaluation of outdoor and indoor space conditions to determine the amount of thermal, mechanical and natural conditioning that is required

Solutions: