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AEE Certified Energy Manager (CEM) Sample Questions:

1. 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) Yes
B) No

2. Which type of single-phase alternating-current motor has the highest efficiency?

A) Permanent split-capacitor motor
B) Electronic-commutated motor
C) Shaded-pole motor

3. For general indoor residential lighting applications, which light source can provide the most appropriate illumination with the highest efficacy?

A) Light-emitting diode (LED)
B) Compact fluorescent (CFL)
C) Mercury vapor (MV)
D) Low-pressure sodium (LPS)
E) Incandescent

4. A building has a 100 m² wall with an R-value of 14.4 (m²-C/W) in a climate with 3,500 heating degree days (HDD). The building heater is 85% efficient [based on the fuel's higher-heating value (HHV)]. The fuel cost is $5.00/GJ [based on the fuel's higher-heating value (HHV)]. What is the annual cost of the heat loss through the wall?

A) $22.56/yr
B) $14.44/yr
C) $10.56/yr
D) $12.35/yr
E) $16.22/yr

5. A piece of equipment costs $250,000 to buy and install. The annual operating cost for the equipment is
$50,000 per year. The equipment will last 15 years. After 15 years, the equipment will have no net salvage value. The annual interest rate is 10%. What is the present value of the life-cycle cost to own and operate the equipment? Use end-of-year annual cash flow analysis.

A) $250,000
B) $556,945
C) $756,113
D) $630,300

Solutions: