AEE CEM real exam prep : Certified Energy Manager (CEM)

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AEE CEM Exam Syllabus Topics:

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

2. Which of the following best describes a dead band in controls?

A) The delay in response of a system to a controlled change
B) A system which changes the output of a controller based on how fast a variable is moving from or to a set point
C) The difference between a sensor variable and its set point
D) A value that has been assigned to a controlled variable
E) A range around a set point with no change in state even though there is a change in sensor input

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

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

4. Calculate the monthly electric bill for a customer that used 400 kW and 75,000 kwh during one month. Use the following declining block structure for a monthly bill:

SELECT THE CORRECT ANSWER

A) $3,280
B) $12,500
C) $4, 580
D) $7,850
E) $9,660

5. For general indoor residential lighting applications, which lamp would you recommend to replace an 11 watt CFL with in order to provide the most appropriate illumination with the highest efficacy?
SELECT THE CORRECT ANSWER

A) 10 watt light-emitting diode
B) 5 watt low-pressure sodium
C) 4 watt incandescent
D) 36 watt fluorescent tube with electronic ballast
E) 7 watt light-emitting diode

Solutions: