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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) $7,850
B) $3,280
C) $12,500
D) $4, 580
E) $9,660

2. Air is heated from 10°C (dry bulb temperature) and 80% relative humidity to 32°C (dry bulb temperature).
What is the new relative humidity?

A) 40%
B) 80%
C) 20%
D) 60%
E) 30%

3. A 50-Hz alternating current (AC) induction motor has 3 pole pairs (6 poles). What is the synchronous speed of the motor?

A) 750 rpm
B) 1,000 rpm
C) 1,500 rpm
D) 600 rpm

4. 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) $630,300
C) $556,945
D) $756,113

5. What is the purpose of top (or skimming) blowdown in a steam boiler?

A) To flush out the boiler room drain system
B) To reduce the buildup of feedwater chemicals in the boiler
C) To dilute the level of impurities in the boiler water thus allowing the addition of cleaner make up water
D) To reduce the buildup of sediment in the boiler

Solutions: