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AEE Certified Energy Manager (CEM) Sample Questions:

1. A 75-kW induction motor operates at 80% partial load and 88% efficiency. A new high-efficiency 75-kW motor can be installed that will operate at 95% efficiency (also at 80% partial load). What is the reduction in electric power demand?

A) 5 kW
B) 2 kW
C) 4 kW
D) 1 kW
E) 8 kW

2. What is the purpose of monitoring energy consumption?
SELECT THE CORRECT ANSWER

A) To support analysis of energy information
B) All of the above
C) To establish a basis of management control
D) To establish when and why there is a deviation in energy consumption patterns

3. A building is conditioned by an air-conditioning and heating system. What technology can directly prevent simultaneous heating and cooling of the space?

A) Derivative control
B) Variable air volume control
C) Setback thermostat
D) Indoor air quality sensors
E) Air handling unit

4. Which of the following is NOT a renewable-energy resource?
SELECT THE CORRECT ANSWER

A) Saw grass
B) Crop residue
C) Geothermal heat
D) Shale gas
E) Ocean waves

5. A compressed air system has a total volume of 247,500 liters. During a 30-minute break in production (air compressor system turned off and no production demand for compressed air), the system pressure drops from
7 bar, gauge (700 kPa, gauge) to 5 bar, gauge (500 kPa, gauge). Calculate the leakage rate in the compressed air system.

A) 32,000 liters/minute
B) 48,250 liters/minute
C) 22,750 liters/minute
D) 8,250 liters/minute
E) 16,500 liters/minute

Solutions: