Continuous improvement of operating system

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Quick delivery

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AEE CEM Exam Syllabus Topics:

AEE Certified Energy Manager (CEM) Sample Questions:

1. How much fuel is required to heat 50 kg water from 20°C water to 200°C saturated steam? Assume the boiler is 80% efficient (based on the higher-heating value of the fuel).

A) 127.2 MJ
B) 169.3 MJ
C) 511.2 MJ
D) 210.5 MJ

2. A three phase, 380-volt system, has the following voltage measurements:
Va = 375 volts
Vb = 380 volts
Vc = 391 volts
Calculate the percent voltage imbalance.

A) 1.1%
B) 3.4%
C) 6.2%
D) 2.4%
E) 5.5%

3. An office building is illuminated with T8 fluorescent lamps. Which of the following is the best schedule for group relamping (total replacement of all the T8 fluorescent lamps in the building)?

A) When 20% of the ballasts have failed
B) When you reach 70% of the rated lamp life
C) When the building owner changes
D) When 25% of the lamps have failed
E) Every 4 years

4. An energy-saving project costs $540,000. The project will have maintenance costs of $25,000 per year. The energy savings from the project are $160,000 per year. What is the simple payback of the project?

A) 3.0 years
B) 2.0 years
C) 5.0 years
D) 4.0 years

5. A facility replaces a natural gas heating system rated at 10,000 kJ/h and 80% efficiency with an electric heat pump rated at 10,000 kJ/h and a coefficient of performance (COP) of 2.3. Will this project also reduce the annual energy utilization index (EUI) for the facility?

A) No
B) Yes

Solutions: