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AEE Certified Energy Manager (CEM) Sample Questions:

1. Exhaust gases from an industrial furnace flow through a heat-recovery steam generator, which generates medium-pressure steam. This steam is used in a steam turbine to generate shaft power driving a fan. Which type of combined heat and power (CHP) cycle does this process describe?

A) Bottoming cycle
B) Combined cycle
C) Topping cycle
D) This cycle is not a combined heat and power system

2. In a PID control system, what is the purpose of the Proportional Gain?

A) Reacts to change
B) Control point
C) Reduces/eliminates offset
D) Senses high load rate

3. An air-conditioning system at full load is rated at 70-kW (thermal cooling) and has a coefficient of performance (COP) of 4.1. What is the electrical load at full load?

A) 17.1 kW
B) 23.3 kW
C) 70.0 kW
D) 46.7 kW
E) 35.0 kW

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

5. A fully-loaded heat pump unit delivers 36-kW thermal heating with a power draw of 12-kW electric. What is the coefficient of performance (COP) at full load?

A) 4.0
B) 5.0
C) 3.0
D) 2.0
E) 6.0

Solutions: