AEE Energy Management CEM

Help you relieve the burden

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AEE Certified Energy Manager (CEM) Sample Questions:

1. A 25-kW motor, at full load, drives a centrifugal fan that produces 160,000 liters per second (l/s) of ventilation air. If the fan speed is reduced to a flow rate of 150,000 l/s, what is the new load on the motor?

A) 20.6 kW
B) 24.2 kW
C) 15.2 kW
D) 30.3 kW
E) 25.0 kW

2. In a typical compressed air system, energy can be saved by which of the following actions?

A) Decreasing supply air pressure
B) Move the inlet air filter to a warmer location
C) Reducing the capacity of the compressed air receiver tanks
D) Raising the air pressure
E) Reducing the air distribution pipe size

3. A facility has a monthly peak power demand of 1,000 kW and an average power factor of 80%. The facility pays a demand charge of $7.50/kVA-month. What is the additional cost per month because the power factor is less than 100%?

A) $3,370/month
B) $0/month
C) $2,244/month
D) $1,875/month
E) $187/month

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

5. When should commissioning be included in the design and construction of a facility?

A) When the design is finalized
B) When construction is finalized
C) When the occupancy permit is accepted
D) When installation of the energy systems begins
E) When the planning process begins

Solutions: