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AEE Certified Energy Manager (CEM) Sample Questions:

1. A facility owner is considering installing a new chiller. The installed project cost will be $300,000. The annual savings from the energy-saving project will be $45,000 for the 20-year life of the chiller. If an energy- service company requires a minimum 20% return on investment (pre-tax), will the energy-service company agree to finance this project?

A) No
B) Yes

2. How can you tell if steam traps in a steam distribution system may NOT be working correctly?

A) Robust flash steam rising from condensate receiver tank vent pipes
B) All of the above
C) Rapid chattering of disk steam traps
D) No sound from inverted bucket steam traps
E) An increase in make-up water requirements relative to steam demand

3. A facility has the thermal cooling load profile shown in the table below. The utility rate tariff has an on-peak time-of-use billing period that begins at 10:00 a.m. and ends at 7:00p.m. Calculate the storage capacity required for a load-shifting operating strategy, to make sure that no thermal cooling Is generated by the chiller during the on-peak utility rate period.

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

A) 66 GJ
B) 84 GJ
C) 72 GJ
D) 48 GJ

4. Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings in a project that upgraded lighting in a large manufacturing plant?

A) Option D - Calibrated simulation
B) Option E - Stipulated savings
C) Option C - Whole facility measurement
D) Option A - Retrofit isolation: key parameter measurement
E) Option B - Retrofit isolation: all parameter measurement

5. If the temperature difference across an external wall is 20°C and the heat flow across the wall is 2.5 Watts/m², calculate the insulation value of the wall (including inside and outside air films)?

A) R = 8 m²-°C/W
B) R = 4 m²-°C/W
C) R = 12 m²-°C/W
D) R = 10 m²-°C/W
E) R = 6 m²-°C/W

Solutions: