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AEE Certified Energy Manager (CEM) Sample Questions:

1. Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

A) 2,250 CDD/yr
B) 2,555 CDD/yr
C) 1,845 CDD/yr
D) 1,955 CDD/yr
E) 2,975 CDD/yr

2. Which of the following is NOT a renewable-energy resource?
SELECT THE CORRECT ANSWER

A) Shale gas
B) Saw grass
C) Ocean waves
D) Crop residue
E) Geothermal heat

3. Which pump system listed below is most likely the best application for converting to variable-speed drive for energy savings?
SELECT THE CORRECT ANSWER

A) Centrifugal pump varying its flowrate with bypass control, circulating liquid in a closed loop cooling system
B) Positive displacement rotary lobe pumps in parallel, in a constant flow rebar quenching application with a static head of 80 m and negligible friction head
C) Piston pump operating at full capacity with throttle valve fully open, transferring liquid from an underground dam to the roof of a building
D) Reciprocating pump with on-off control, transferring liquid vertically for one hour per day

4. Why do electric utility companies transmit power at high voltages?
SELECT THE CORRECT ANSWER

A) Higher voltages are safer
B) Higher voltages are more stable
C) Electrical frequency is more stable
D) Transmission power losses (12R) are less

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: