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AEE Certified Energy Manager (CEM) Sample Questions:
1. Which of the following controls can optimize the operation of lighting systems?
A) Photocells
B) Dimming ballasts
C) Timer
D) Occupancy sensors
E) All of the above
2. A 1OO-kW packaged engine-generate combined heat and power (CHP) system has the specifications listed below. The CHP equipment operates fully loaded for 8.000 h/yr. What isthe annual fuel cost for the ChP equipment?
CMP equipment specifications: Electrical output 100kw Electrical efficiency: 25% Thermal recovery efficiency: 50*6 Total CMP efficiency: 75% Additional information: Fuel cost: S3.S0/GJ Electricity cost S0.06/kWh Previous water heating efficiency:
8046 Mot water usage: 75,700 liters/day (21 *C temperature rise)
[The question from the previous image, which was about calculating the annual cost of heat loss through a wall, but had a discrepancy between the calculated cost and the provided answer choices]
A) $52,222/yr
B) $28,900/yr
C) $32,668/yr
D) $58,300/yr
E) $43,776/yr
3. 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) Water-storage systems require smaller storage tanks since water has a higher density than ice
B) Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
C) Ice-storage systems require lower maintenance due to lower pumping volume
D) Ice-storage systems operate with a higher coefficient of performance (COP)
4. At the end of a performance contract, who owns the equipment installed by the project?
A) The bank
B) The energy service company
C) The company that paid the contract payments
D) The equipment manufacturer
5. An energy-saving project saves $30,000 per year. The project life is 10 years and the company minimum annual rate of return (MARR) is 15%. How much can the project cost and still be cost effective?
A) $165,903
B) $198,992
C) $201,123
D) $188,343
E) $150,570
Solutions:
Question # 1 Answer: E | Question # 2 Answer: E | Question # 3 Answer: B | Question # 4 Answer: C | Question # 5 Answer: A |