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AEE Certified Energy Manager (CEM) Sample Questions:
1. Calculate the monthly electric bill for a customer that used 400 kW and 75,000 kwh during one month. Use the following declining block structure for a monthly bill:
SELECT THE CORRECT ANSWER
A) $9,660
B) $7,850
C) $4, 580
D) $12,500
E) $3,280
2. Using an interest rate of 15%, an energy project has a net-present value (NPV) of $3,500. Which statement is true about the project's internal rate of return (IRR)?
A) IRR = 15%
B) IRR < 15%
C) IRR > 15%
D) IRR < 0%
3. 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) Sensible heat
D) Latent heat
4. A new lighting system costs $60,000. The new lighting system has a 15-year life and the minimum required rate of return (MARR) is 15%. How much must the new lighting system save to be life-cycle cost effective?
A) $27,090/year
B) $33,200/year
C) $10,260/year
D) $12,556/year
E) $15,650/year
5. A cooling tower is delivering water to a chilled-water plant. The cooling tower outlet temperature has a 6°C approach temperature to the ambient air, wet-bulb temperature. The outside air conditions are 20°C dry bulb,
60% relative humidity. Using the psychrometric chart, at what temperature can the cooling tower deliver water to the chilled-water plant?
A) 21°C
B) 13°C
C) 25°C
D) 17°C
Solutions:
Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: D |