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AEE Certified Energy Manager (CEM) Sample Questions:

1. How can commissioning reduce the life-cycle cost to owners and operators?

A) Reduce the cost of change orders during construction
B) All of the above
C) Improve the performance of energy systems
D) Improve the effectiveness of operations and maintenance
E) Improve the satisfaction of building occupants

2. What instrument determines flow rate by measuring pressure differential?

A) Psychrometer
B) Hot-wire anemometer
C) Ultrasonic flow meter
D) Pitot tube
E) Infrared camera

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

4. Using the natural gas combustion efficiency tables in your workbook, find the combustion efficiency (based on higher-heating value) of a natural-gas-fired boiler if the excess air level is measured at 31.9% and the stack temperature rise is 187.8°C.

A) 80%
B) 78%
C) 82%
D) 76%
E) 84%

5. Which of the following is a closed-loop controller?

A) Accelerator pedal in an automobile
B) Time clock schedule controller
C) Manual dimmer for a light switch
D) Thermostat for an air conditioning unit

Solutions: