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AEE Certified Energy Manager (CEM) Sample Questions:

1. Which of the advantages listed below, makes an ice TES system more preferred over a water TES system, when a load shifting strategy is considered?

A) Ice-storage systems require lower maintenance due to lower pumping volume
B) Water-storage systems require smaller storage tanks since water has a higher density than ice
C) Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
D) Ice-storage systems operate with a higher coefficient of performance (COP)

2. 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) $9,660
C) $12,500
D) $4, 580
E) $7,850

3. A 50-Hz alternating current (AC) induction motor has 3 pole pairs (6 poles). What is the synchronous speed of the motor?

A) 750 rpm
B) 600 rpm
C) 1,500 rpm
D) 1,000 rpm

4. A new energy-efficient boiler costs $60,890 to buy and install. The new energy-efficient boiler will save
$15,400 per year and last for 20 years. What is the internal rate of return (IRR) of the project?

A) 25%
B) 30%
C) 10%
D) 15%
E) 20%

5. An energy project implemented today saves $10,000 per year for the next 20 years. Using the 5% interest table, determine the total value of savings at the end of the 20th year?

A) $146,907
B) $124,620
C) $496,991
D) $330,660
E) $200,000

Solutions: