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AEE Certified Energy Manager (CEM) Sample Questions:

1. 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) $12,500
B) $3,280
C) $4, 580
D) $9,660
E) $7,850

2. What is the main cause of low power factor?

A) Fluorescent lighting
B) Computers and electronic equipment
C) Harmonics
D) Low-load induction motors
E) Solar flares

3. 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) $32,668/yr
B) $58,300/yr
C) $43,776/yr
D) $52,222/yr
E) $28,900/yr

4. Which of the following is NOT a typical benefit of performance contracting from the building owner's perspective?

A) Maintenance services provided by the performance contractor can add value to the overall savings achieved
B) Performance contracting can provide access to external financing when the owner may not have sufficient equity for in-house financing for large projects
C) Net cash flow can be neutral or positive for the owner
D) The energy-service company can have a financial incentive to achieve projected savings
E) Performance contracting is a simple and quick process

5. Some international electric utilities use 'net metering" for customers with renewable energy equipment, such as photovoltaic power panels. Which of the following best describes net metering with regard to excess power generation and utility billing practices?
SELECT THE CORRECT ANSWER

A) Accept excess electric energy generated by a customer's energy system but with no financial compensation for the energy fed into the utility's transmission system
B) Accept excess electric energy generated by a customer's energy system, the value of which can offset the value of energy consumed by the customer over the net metering period
C) Transmit electric energy generated by a customer's energy system so that the customer may sell the excess electricity to another company on the transmission system

Solutions: