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[General] Guaranteed CEM Success & Exam CEM Simulations

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【General】 Guaranteed CEM Success & Exam CEM Simulations

Posted at yesterday 10:03      View：8 | Replies：0        Print      Only Author   [Copy Link] 1#
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AEE Certified Energy Manager (CEM) Sample Questions (Q34-Q39):NEW QUESTION # 34
Electricity costs SO. 10 per kWh. if an electric water heater has an efficiency of 95*6. what is the equivalent price of natural gas per Gigajoule for a natural gas water heater? The natural gas water heater has an efficiency of 95*t based on lower-heating value.
[Natural gas has an energy content of 36.400 K|/m3 (higher-heating value) and 32-760 K/m3 (lower-heating value).] SELECT THE CORRECT ANSWER
  • A. $15/GJ
  • B. $25 /GJ
  • C. $33 /GJ
  • D. $21 /GJ
Answer: D
Explanation:
To determine the equivalent price of natural gas per gigajoule (GJ) for a natural gas water heater, we compare the cost of electricity and natural gas on an energy-equivalent basis.
Step 1: Convert Electricity Cost to Cost per GJ
* Electricity cost0.10/kWh
* 1 GJ =277.8 kWh
A table with numbers and equations AI-generated content may be incorrect.


NEW QUESTION # 35
Which is the best application for variable-speed drives?
  • A. Centrifugal fan motor in a multi-zone air conditioning system
  • B. Reciprocating air compressor
  • C. Waste-water sewer lift pump
  • D. Centrifugal fan motor in a variable-air volume air-conditioning system
Answer: D

NEW QUESTION # 36
A hot-water boiler has a cut-in set point of 65°C on the hot water supply temperature and a differential set point of 10°C. What is the hot-water supply temperature that causes the boiler to turn off?
  • A. It depends on the return water temperature
  • B. 65°C
  • C. 55°C
  • D. 75°C
Answer: D

NEW QUESTION # 37
Which of the following is NOT a renewable-energy resource?
SELECT THE CORRECT ANSWER
  • A. Geothermal heat
  • B. Shale gas
  • C. Crop residue
  • D. Saw grass
  • E. Ocean waves
Answer: B
Explanation:
Renewable energy resources are naturally replenished on a human timescale. Let's evaluate each option:
A). Saw grass:
A biomass resource, renewable through regrowth.
B). Shale gas:
A fossil fuel extracted from shale formations, non-renewable.
C). Geothermal heat:
Energy from Earth's internal heat, renewable.
D). Ocean waves:
Mechanical energy from ocean surface waves, renewable.
E). Crop residue:
Organic materials from agriculture, renewable.
Conclusion:
Shale gas is not a renewable energy resource. Therefore, the correct answer is B.

NEW QUESTION # 38
Using the natural gas combustion efficiency tables in your workbook, find the combustion efficiency (based on higher-heating value) of a natural-gas-fired boiler if the excess air level is measured at 31.9% and the stack temperature rise is 187.8°C.
  • A. 80%
  • B. 78%
  • C. 82%
  • D. 76%
  • E. 84%
Answer: B

NEW QUESTION # 39
......
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