CEM LATEST EXAM PASS4SURE - CEM RELIABLE TEST ONLINE

CEM Latest Exam Pass4sure - CEM Reliable Test Online

CEM Latest Exam Pass4sure - CEM Reliable Test Online

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Tags: CEM Latest Exam Pass4sure, CEM Reliable Test Online, Minimum CEM Pass Score, Training CEM Pdf, Latest CEM Exam Discount

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AEE Certified Energy Manager (CEM) Sample Questions (Q21-Q26):

NEW QUESTION # 21
Thermal scans of electrical equipment are useful for:

  • A. Reading current carrying capacity of installed conductors
  • B. Locating a loose electrical connection
  • C. Measuring the load on a refrigerant system
  • D. Locating areas of high power factor

Answer: B

Explanation:
Step 1: Purpose of Thermal Scans
Thermal scans (infrared thermography) detecttemperature variationsin electrical components.
* Loose connectionsincrease resistance # causeoverheating, which isvisible in thermal scans.
Step 2: Analysis of Each Option
* A. Locating areas of high power factor#Incorrect#Power factor is measured with power meters.
* B. Reading current-carrying capacity of conductors#Incorrect#Measured using ammeters and engineering data.
* C. Locating a loose electrical connection#Correct#Loose connections causeheat buildup, easily detected with thermal scans.
* D. Measuring the load on a refrigerant system#Incorrect#Refrigerant loads are measured using pressure sensors and flow meters.
Thus, the correct answer isC. Locating a loose electrical connection.


NEW QUESTION # 22
Which of the following is/are benefits of commissioning?

  • A. Ensures a system is installed to operate as intended
  • B. Ensures staff know how to operate a system as intended
  • C. Ensures staff know how to maintain a system as intended
  • D. All of the above
  • E. Ensures a system is designed to operate as intended

Answer: D


NEW QUESTION # 23
Which of the following steam turbines will likely not provide steam output at a useable temperature for industrial processes?

  • A. Condensing turbine
  • B. Extraction turbine
  • C. Back-pressure turbine
  • D. Answers A and B

Answer: A


NEW QUESTION # 24
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. $756,113
  • C. $630,300
  • D. $556,945

Answer: D


NEW QUESTION # 25
According to the institute of Electrical and Electronic Engineers (IEEE) standard 519. "Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems." the maximum total harmonic distortion (THD) for general low voltage systems less than 600 votts) should be:
SELECT THE CORRECT ANSWER

  • A. Less than 20%
  • B. Less than 5%
  • C. Greater than 1%
  • D. Less than 10%
  • E. Less than 1%

Answer: B

Explanation:
The Institute of Electrical and Electronics Engineers (IEEE) Standard 519, titled "Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems," sets forth guidelines to maintain the quality of electrical power by limiting harmonic distortions. According to IEEE 519, for general low-voltage systems (defined as systems with a voltage less than 600 volts), the Total Harmonic Distortion (THD) of the voltage waveform should not exceed 5%. This threshold ensures the reliable operation of electrical equipment and minimizes potential issues such as overheating or malfunctioning caused by excessive harmonics.
Therefore, the correct answer is C. Less than 5%.


NEW QUESTION # 26
......

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