あなたを合格させるEnergy Management CEM試験問題集で2025年07月30日には132問あります
CEM無料試験学習ガイド！（更新された132問あります)
質問 # 51
What is the definition of lamp life for a fluorescent lamp?
- A. The time at which 50% of a large sample of lamps have failed
- B. The time at which 70% of a large sample of lamps have failed
- C. The time at which lamps begin to fail
- D. The time at which lumen output has reduced to 70% of the initial light output
- E. The time at which lumen output has reduced by 50%
正解：D
質問 # 52
In an ammonia-water absorption chiller, what material is the refrigerant?
- A. Water
- B. Ammonia
- C. Some form of fluorocarbon
- D. Lithium bromide
正解：B
質問 # 53
Which of the following steam turbines will likely not provide steam output at a useable temperature for industrial processes?
- A. Answers A and B
- B. Extraction turbine
- C. Back-pressure turbine
- D. Condensing turbine
正解：D
質問 # 54
A refrigerant-to-water heat exchanger can be added to air-conditioning equipment to heat water using the waste heat in the vapor compression refrigerant cycle. Where is this type of heat exchanger located in the refrigerant loop?
- A. After the condenser coil, before the thermal expansion valve
- B. After the expansion valve, before the evaporator coil
- C. After the compressor, before the condenser coil
- D. After the evaporator coil, before the compressor
正解：C
質問 # 55
An outdoor parking area has 25 light poles. Each pole has a 420 Watt (ballast included) high-pressure sodium (HPS) luminaire. The parking area lights are illuminated 4,500 hours per year and the electricity cost is $0.08
/kWh. What is the annual energy cost reduction if each luminaire is replaced with a 220-Watt (driver included) LED luminaire?
- A. $2,200/yr
- B. $1,500/yr
- C. $1,200/yr
- D. $1,800/yr
- E. $2,600/yr
正解：D
解説：
To determine the annual energy cost savings from switching to LED luminaires:
A table with numbers and symbols AI-generated content may be incorrect.
質問 # 56
A high-pressure steam system passes 180°C condensate (saturated liquid) through a steam trap to an atmospherically vented condensate receiver tank. If the steam trap is working properly, how much of the condensate mass can be lost out the vent of the receiver tank in the form of flash steam?
- A. 15%
- B. 66%
- C. 25%
- D. 100%
- E. 6%
正解：C
質問 # 57
In a performance contract, which group has the greatest investment risk?
- A. The equipment manufacturer
- B. Risk is shared by the terms in the performance contract
- C. The energy-service company
- D. The company installing the energy project
正解：C
質問 # 58
A compressed air system has a total volume of 247,500 liters. During a 30-minute break in production (air compressor system turned off and no production demand for compressed air), the system pressure drops from
7 bar, gauge (700 kPa, gauge) to 5 bar, gauge (500 kPa, gauge). Calculate the leakage rate in the compressed air system.
- A. 16,500 liters/minute
- B. 48,250 liters/minute
- C. 8,250 liters/minute
- D. 22,750 liters/minute
- E. 32,000 liters/minute
正解：A
質問 # 59
Which heat recovery device listed below can be used to preheat boiler make-up water using the heat energy from skimming blowdown?
- A. Heat pipe
- B. Desiccant heat wheel
- C. Regenerative recouperator
- D. Shell and tube heat exchanger
正解：D
質問 # 60
Periodic commissioning of a building automation system (BAS) might include which of the following?
- A. Verify controls are still responsive to the BAS
- B. Answers A and C
- C. All of the above
- D. Retraining staff on the BAS functions and programming
- E. Removing temperature set point overrides
正解：C
質問 # 61
What does a manometer measure?
- A. Pressure
- B. Distance
- C. Volume
- D. Voltage
正解：A
解説：
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.
質問 # 62
In general, which of the following is the least expensive and easiest way to finance an energy project?
- A. Equity
- B. Debt
- C. Performance contract
正解：B
質問 # 63
How much fuel is required to heat 50 kg water from 20°C water to 200°C saturated steam? Assume the boiler is 80% efficient (based on the higher-heating value of the fuel).
- A. 511.2 MJ
- B. 169.3 MJ
- C. 210.5 MJ
- D. 127.2 MJ
正解：B
質問 # 64
An air-conditioning system at full load is rated at 70-kW (thermal cooling) and has a coefficient of performance (COP) of 4.1. What is the electrical load at full load?
- A. 23.3 kW
- B. 35.0 kW
- C. 17.1 kW
- D. 70.0 kW
- E. 46.7 kW
正解：A
質問 # 65
An air conditioning unit cools make-up air from 25°C (dry bulb temperature) and 50% relative humidity down to 13°C. What type of heat has been removed from the air?
- A. Latent heat
- B. Both sensible and latent heat
- C. No heat energy has been removed
- D. Sensible heat
正解：B
質問 # 66
What is the best type of heat exchanger to recover and transfer latent heat energy from one air stream to another?
- A. Ceramic recuperator
- B. Run-around system
- C. Shell and tube
- D. Desiccant heat wheel
- E. Heat pipe
正解：D
質問 # 67
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