AEE Certified Energy Manager (CEM) 認定 CEM 試験問題:

1. Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

A) 1,955 CDD/yr
B) 2,975 CDD/yr
C) 2,250 CDD/yr
D) 2,555 CDD/yr
E) 1,845 CDD/yr

2. A 100-kW electrical load has a power factor of 75%. What capacitance, in KVAR, will improve the power factor to 95%?

A) 15.7 kVAR
B) 45.2 kVAR
C) 55.3 kVAR
D) 33.1 kVAR
E) 25.3 kVAR

3. 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 < 0%
B) IRR = 15%
C) IRR > 15%
D) IRR < 15%

4. A steam trap with a 6-mm orifice in an 0.8-MPa steam system has failed open. The steam system is pressurized 8.760 hours/yr. The steam cost is $15.00 /GJ. Using the table below, what is the annual cost of the vented steam through the failed steam trap? ignore any condensate return issues.

[The question from the previous image, which was about calculating the annual cost of heat loss through a wall, but had a discrepancy between the calculated cost and the provided answer choices]

A) $30,000/yr
B) $10,000/yr
C) $5,000/yr
D) $20,000/yr
E) $40,000/yr

5. What is the uniform series present worth factor (P/A, i%, n) for an annual interest rate of 15% and a lifetime of 20 years?

A) 4.676
B) 6.259
C) 0.160
D) 0.214

質問と回答：