ORIGINAL CEM QUESTIONS | ACCURATE CERTIFIED ENERGY MANAGER (CEM) 100% FREE DUMPS REVIEWS

Original CEM Questions | Accurate Certified Energy Manager (CEM) 100% Free Dumps Reviews

Original CEM Questions | Accurate Certified Energy Manager (CEM) 100% Free Dumps Reviews

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Tags: Original CEM Questions, Dumps CEM Reviews, Trustworthy CEM Source, CEM Exam Questions, CEM Latest Study Plan

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AEE Certified Energy Manager (CEM) Sample Questions (Q59-Q64):

NEW QUESTION # 59
A steam trap with a 6-mm orifice in an 0.8-MPa steam system has failed open. The steam system is pressurized8.760 hours/yr. The steam cost is $15.00 /GJ. Using thetable below, what is the annualcost 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. $5,000/yr
  • B. $30,000/yr
  • C. $10,000/yr
  • D. $40,000/yr
  • E. $20,000/yr

Answer: B


NEW QUESTION # 60
A facility has the thermal cooling load profile shown in the table below. The utility rate tariff has an on-peak time-of-use billing period that begins at 10:00 a.m. and ends at 7:00p.m. Calculate the storage capacity required for a load-shifting operating strategy, to make sure that no thermal cooling Is generated by the chiller during the on-peak utility rate period.

[Question from the previous image, which was about storage capacity for load shifting, but the table was missing]

  • A. 84 GJ
  • B. 72 GJ
  • C. 66 GJ
  • D. 48 GJ

Answer: C


NEW QUESTION # 61
A new energy-efficient boiler costs $60,890 to buy and install. The new energy-efficient boiler will save
$15,400 per year and last for 20 years. What is the internal rate of return (IRR) of the project?

  • A. 30%
  • B. 10%
  • C. 25%
  • D. 15%
  • E. 20%

Answer: E


NEW QUESTION # 62
Why do electric utility companies transmit power at high voltages?
SELECT THE CORRECT ANSWER

  • A. Higher voltages are more stable
  • B. Transmission power losses (12R) are less
  • C. Electrical frequency is more stable
  • D. Higher voltages are safer

Answer: B

Explanation:
Electric utility companies transmit power at high voltages primarily to reduce transmission power losses, which are proportional to the square of the current (I²) multiplied by the resistance (R) of the transmission lines. This relationship is expressed by the formula for power loss: P_loss = I²R.
Key Points:
* Power Loss and Current Relationship:Power losses in transmission lines are directly proportional to the square of the current flowing through them. Reducing the current decreases these losses significantly.
* High Voltage Transmission:By increasing the transmission voltage, the current required to deliver the same amount of power decreases. This is because power (P) is the product of voltage (V) and current (I): P = VI. For a given power level, increasing voltage allows for a corresponding decrease in current.
* Reduced I²R Losses:Lower current results in reduced I²R losses, enhancing the efficiency of power transmission over long distances.
Conclusion:
Transmitting power at high voltages minimizes transmission losses, making it the most efficient method for long-distance electrical power delivery. Therefore, the correct answer is C. Transmission power losses (I²R) are less.


NEW QUESTION # 63
Infiltration (inward air leakage) in a building is dependent on several factors. Which of the following is least likely to affect or influence infiltration in a building?

  • A. Outside air temperature
  • B. Poor or missing weatherstripping
  • C. Building height
  • D. Fuel type used for heating and cooling
  • E. Outside air wind speed

Answer: D


NEW QUESTION # 64
......

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