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| Section | Weight | Objectives |
|---|---|---|
| Distributed Generation and Renewable Energy | 4–6 | - Combined heat and power (CHP) - Grid integration and economics - Solar, wind, biomass, geothermal |
| Codes, Standards and Regulations | 5% | - Compliance and reporting requirements - Energy efficiency codes and standards - Sustainability policies and frameworks |
| Electrical Power Systems and Motors | 15% | - Power factor correction and load management - Power distribution and quality - Motor systems, efficiency and controls |
| Energy Audits and Instrumentation | 10% | - Data collection and analysis - Energy performance indicators - Audit levels and methodologies - Measurement tools and instrumentation |
| Industrial Systems | 6–8 | - Compressed air, pumping, and drying systems - Process energy efficiency |
| Boiler and Steam Systems | 4–6 | - Maintenance and optimization - Operation and efficiency |
| Lighting Systems | 10% | - Design and control strategies - Daylighting integration - Lighting technologies and efficiency |
| HVAC Systems and Building Envelope | 15% | - Thermal envelope performance - Load calculation and system selection - Heating, ventilation and air conditioning |
| Measurement and Verification | 5% | - M&V protocols and standards - Baseline development and savings calculation |
| Building Automation and Controls | 5% | - Automation and optimization - Building management systems - Control systems and strategies |
| Energy Accounting and Economics | 15% | - Energy units and conversions - Time value of money, NPV, IRR, payback analysis - Utility rate structures and tariffs - Life cycle costing and economic analysis |
| Energy Storage Systems | 3–5 | - Integration and benefits - Storage technologies and applications |
| Operations, Maintenance and Commissioning | 5% | - Commissioning and retro-commissioning - Maintenance best practices |
| Energy Savings Performance Contracting | 5% | - Guaranteed savings and risk allocation - Contract structures and financing |
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NEW QUESTION # 72
Air is heated from 10°C (dry bulb temperature) and 80% relative humidity to 32°C (dry bulb temperature).
What is the new relative humidity?
Answer: A
NEW QUESTION # 73
A controller has a signal output that can range from 4 to 20 mA (milli-amperes). The controller regulates the output temperature from a three-way mixing valve from 5°C to 15°C. What is the control gain?
Answer: D
NEW QUESTION # 74
How can you tell if steam traps in a steam distribution system may NOT be working correctly?
Answer: D
NEW QUESTION # 75
When comparing two similar facilities, you see that the facility with newer, higher-efficiency equipment has a higher energy-use index [EUI] (kJ/m²-yr). What might be the cause?
Answer: D
Explanation:
1) CEM Principle: Equipment Efficiency # System Performance
The AEE CEM Body of Knowledge stresses that higher-efficiency equipment does not guarantee lower energy use unless systems are:
* Properly commissioned
* Correctly controlled
* Operated as designed
2) Evaluation of Options
* A. The facility with the higher EUI is in need of commissioning #
* Most common cause per CEM case studies: controls, sequences, and integration not optimized.
* B. The facility with the lower EUI is in need of commissioning #
* Lower EUI indicates better performance.
* C. The facility with the lower EUI requires a performance contract #
* No evidence supports this.
* D. The facility with the higher efficiency equipment should have a higher EUI #
* Contradicts energy efficiency principles.
* E. The facility with the higher EUI requires a SCADA system #
* Monitoring alone does not correct poor performance.
CEM Exam Insight
Commissioning ensures that high-efficiency equipment actually delivers expected energy performance.
NEW QUESTION # 76
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?
Answer: B
NEW QUESTION # 77
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