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100% Pass Quiz AEE CEM - Certified Energy Manager (CEM) High Hit-Rate Reliable Exam Online

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AEE Certified Energy Manager (CEM) Sample Questions (Q88-Q93):

NEW QUESTION # 88
Insulation has a thermal conductivity of 0.04 Watt/(m-°C). What is the R-value for this insulation when it is 5- cm thick?

A. 20 Watt/(m²-°C)
B. 0.8 (m²-°C)/Watt
C. 20 (m²-°C)/Watt
D. 1.25 (m²-°C)/Watt
E. 2.20 Watt/m²

Answer: D

NEW QUESTION # 89
An energy-saving project costs $540,000. The project will have maintenance costs of $25,000 per year. The energy savings from the project are $160,000 per year. What is the simple payback of the project?

A. 4.0 years
B. 5.0 years
C. 2.0 years
D. 3.0 years

Answer: A

Explanation:
To determine the simple payback period for the energy-saving project, we need to apply the standard formula used in energy management as per the Association of Energy Engineers (AEE) Certified Energy Manager (CEM) guidelines. The simple payback period is a widely used metric in energy efficiency projects to evaluate how long it takes for the initial investment to be recovered through net savings. Let's break this down step-by-step using the provided data and CEM-aligned methodology.
Step 1: Understand the Simple Payback Formula
* Formula: Simple Payback Period (years)=Initial Investment CostNet Annual Savings ext{Simple Payback Period (years)} = rac{ ext{Initial Investment Cost}}{ ext{Net Annual Savings}} Simple Payback Period (years)=Net Annual SavingsInitial Investment Cost
* Definition: The simple payback period represents the time (in years) required for the cumulative savings to equal the initial investment, without considering the time value of money (e.g., discount rates or inflation).
* CEM Reference: AEE CEM training materials emphasize this formula in the "Energy Economics" section, where simple payback is a fundamental tool for assessing project feasibility.
Step 2: Identify Given Data
* Initial Investment Cost: $540,000 (one-time cost of the project).
* Annual Energy Savings: $160,000 per year (benefit from the project).
* Annual Maintenance Costs: $25,000 per year (additional cost incurred due to the project).
* Net Annual Savings: This must account for both the savings and the costs incurred annually.
Step 3: Calculate Net Annual Savings
* Definition: Net annual savings is the difference between the annual energy savings and any additional annual costs (e.g., maintenance).
* Verification: The problem specifies maintenance costs as an ongoing expense tied to the project, which reduces the effective savings. CEM guidelines require including such costs in payback calculations unless explicitly stated otherwise.
Step 4: Compute the Simple Payback Period
* Apply the Formula: Simple Payback Period=Initial Investment CostNet Annual Savings ext{Simple Payback Period} = rac{ ext{Initial Investment Cost}}{ ext{Net Annual Savings}} Simple Payback Period=Net Annual SavingsInitial Investment Cost Simple Payback Period=540,
000135,000=4.0 years ext{Simple Payback Period} = rac{540,000}{135,000} = 4.0 , ext{years} Simple Payback Period=135,000540,000=4.0years
* Result: The payback period is exactly 4.0 years, meaning it takes 4 years for the net savings to recover the initial investment.
Step 5: Validate Against Options
* Options:A. 2.0 yearsB. 3.0 yearsC. 4.0 yearsD. 5.0 years
* Check:
* If we ignored maintenance costs (incorrectly), payback would be 540,000160,000=3.375 rac
{540,000}{160,000} = 3.375 160,000540,000=3.375 years, which rounds to 3.4-not an exact match for any option.
* With maintenance costs included, 540,000135,000=4.0 rac{540,000}{135,000} = 4.0
135,000540,000=4.0, which matches option C precisely.
* Conclusion: Option C (4.0 years) is correct based on the net savings approach.

NEW QUESTION # 90
What does a manometer measure?

A. Distance
B. Volume
C. Voltage
D. Pressure

Answer: D

Explanation:
Amanometeris used to measurepressure, particularly in gases and liquids.
Step 1: Analysis of Each Option
* Pressure (A):#Correct. Manometers are commonly used in HVAC, industrial, and lab applications.
* Volume (B):#Incorrect. Volume is measured using flow meters or tanks.
* Distance (C):#Incorrect. Distance is measured using rulers or lasers.
* Voltage (D):#Incorrect. Voltage is measured using voltmeters.
Thus, the correct answer isA. Pressure.

NEW QUESTION # 91
A facility replaces a natural gas heating system rated at 10,000 kJ/h and 80% efficiency with an electric heat pump rated at 10,000 kJ/h and a coefficient of performance (COP) of 2.3. Will this project also reduce the annual energy utilization index (EUI) for the facility?

A. No
B. Yes

Answer: B

Explanation:
The Energy Utilization Index (EUI) is measured astotal energy consumption per unit area.
Step 1: Compare Energy Inputs for Both Systems
* Existing Natural Gas System:
* Heating output:10,000 kJ/h
* Efficiency:80%
* Required input energy
A screenshot of a math test AI-generated content may be incorrect.

NEW QUESTION # 92
What is the purpose of monitoring energy consumption?
SELECT THE CORRECT ANSWER

A. To establish when and why there is a deviation in energy consumption patterns
B. All of the above
C. To support analysis of energy information
D. To establish a basis of management control

Answer: B

Explanation:
Monitoring energy consumption is a critical component of effective energy management. It serves multiple purposes that collectively enhance an organization's ability to control energy use, identify inefficiencies, and implement improvements. These purposes include:
* Establishing a Basis of Management Control:By systematically tracking energy consumption, organizations create a foundation for managing energy use effectively. This data enables the setting of benchmarks and performance indicators, facilitating informed decision-making and strategic planning.
* Identifying Deviations in Energy Consumption Patterns:Continuous monitoring allows for the detection of anomalies or unexpected changes in energy usage. Recognizing when and why these deviations occur is essential for diagnosing potential issues, such as equipment malfunctions or operational inefficiencies, and addressing them promptly.
* Supporting Analysis of Energy Information:Comprehensive energy data collection supports detailed analysis, aiding in understanding consumption trends, evaluating the impact of energy conservation measures, and identifying opportunities for further efficiency improvements.
Given that monitoring energy consumption fulfills all the above functions, the correct answer is D. All of the above.

NEW QUESTION # 93
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Hugh Fox Hugh Fox

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