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AEE Certified Energy Manager (CEM) Sample Questions:

1. 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

2. An air conditioning unit cools make-up air from 25°C (dry bulb temperature) and 50% relative humidity down to 13°C. What type of heat has been removed from the air?

A) Both sensible and latent heat
B) No heat energy has been removed
C) Latent heat
D) Sensible heat

3. The set point for the chiller supply water temperature is varied as a function of the thermal demand for space cooling. What do you call this control strategy?

A) Condenser-water temperature reset
B) Night setback
C) Reheat coil reset
D) Chilled-water temperature reset

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) $16.22/yr
D) $10.56/yr
E) $12.35/yr

5. In general, which of the following is the least expensive and easiest way to finance an energy project?

A) Performance contract
B) Debt
C) Equity

Solutions: