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AEE Certified Energy Manager (CEM) Sample Questions:

1. The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that ambient air is fed directly to the air compressor's intake, what impact can be expected on the air compressor's energy requirement?

A) No measureable change in energy use
B) Increase energy use by 3.8%
C) Decrease energy use by 7.6%
D) Decrease energy use by 3.8%
E) Increase energy use by 7.6%

2. A facility has the thermal cooling load profile shown in the table below. The utility rate traffic has an no-peak time-of-use period that begins at 10:00 a.m ends at 7:00 p.m. What chiller capacity (output) is required for a load-leveling operating strategy?

[Question from the previous image, which was about chiller capacity for load leveling, but the table was missing]

A) 4.0 GJ/h
B) 5.0 GJ/h
C) 8.0 GJ/h
D) 7.0 GJ/h

3. 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) 1,955 CDD/yr
C) 1,845 CDD/yr
D) 2,555 CDD/yr
E) 2,975 CDD/yr

4. Which of the following statements regarding refrigerants is NOT correct?
5ELECT THE CORRECT ANSWER

A) R-32 and R-134a are Hydro Fluoro Carbons with zero ozone depleting potential, and significant global warming impact
B) R-22 is a Hydro Chloro Carbon with significant ozone depleting potential and significant global warming impact
C) R-11 and R-12 are Chloro Fluoro Carbons with significant ozone depleting potential
D) R-1234yf is a Hydro Fluoro Olefin with zero ozone depleting potential, and little global warming potential
E) R-407C is a blended Hydro Fluoro Carbon or near Azeotropic mixture, and can be used as a replacement for R-22 in commercial applications

5. The International Performance Measurement and Verification Protocol (IPMVP) has how many categories (method options) to determine the performance of an energy- or water-consuming system?

A) 2 Options
B) 5 Options
C) 4 Options
D) 6 Options
E) 3 Options

Solutions: