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NEW QUESTION # 23
Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings in a project that upgraded lighting in a large manufacturing plant?
- A. Option E - Stipulated savings
- B. Option B - Retrofit isolation: all parameter measurement
- C. Option A - Retrofit isolation: key parameter measurement
- D. Option C - Whole facility measurement
- E. Option D - Calibrated simulation
Answer: B
NEW QUESTION # 24
Which of the following is NOT a typical benefit of performance contracting from the building owner's perspective?
- A. Performance contracting can provide access to external financing when the owner may not have sufficient equity for in-house financing for large projects
- B. Maintenance services provided by the performance contractor can add value to the overall savings achieved
- C. Performance contracting is a simple and quick process
- D. Net cash flow can be neutral or positive for the owner
- E. The energy-service company can have a financial incentive to achieve projected savings
Answer: C
NEW QUESTION # 25
What instrument is NOT used to measure temperature?
- A. Hot-wire anemometer
- B. Bimetallic thermometer
- C. Thermistor
- D. Thermometer
- E. Optical pyrometer
Answer: A
Explanation:
Step 1: Purpose of Each Instrument
* Hot-wire anemometer# Measures air velocity, NOT temperature.
* Bimetallic thermometer# Measures temperature using metal expansion.
* Thermistor# Measures temperature using resistance change.
* Thermometer# Directly measures temperature.
* Optical pyrometer# Measures high temperatures using infrared radiation.
Since ahot-wire anemometer measures airspeed, not temperature, the correct answer isA. Hot-wire anemometer.
NEW QUESTION # 26
A three phase, 380.volt system has the following voltage measurements:
Va = 375$ volts
Vb = 380$ volts
Vc = 391$ volts
Calculate the percent voltage imbalance.
SELECT THE CORRECT ANSWER
- A. 6.2%
- B. 3.4%
- C. 1.1%
- D. 5.5%
- E. 2.4%
Answer: E
NEW QUESTION # 27
What type of heat exchanger is commonly built into AHU's or large RTU's, can be used to recover heat from exhaust air, and may cause cross-contamination between heat exchange fluids?
Select the Correct Answer
- A. Dessiccant heat wheel
- B. Plate and frame
- C. Heat pump
- D. Heat pipe
- E. Run-around coil
Answer: A
NEW QUESTION # 28
Using an interest rate of 15%, an energy project has a net-present value (NPV) of $3,500. Which statement is true about the project's internal rate of return (IRR)?
- A. IRR > 15%
- B. IRR < 15%
- C. IRR = 15%
- D. IRR < 0%
Answer: A
NEW QUESTION # 29
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. No heat energy has been removed
- B. Both sensible and latent heat
- C. Sensible heat
- D. Latent heat
Answer: B
NEW QUESTION # 30
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. 48 GJ
- C. 66 GJ
- D. 72 GJ
Answer: C
NEW QUESTION # 31
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. $1,500/yr
- B. $1,800/yr
- C. $1,200/yr
- D. $2,200/yr
- E. $2,600/yr
Answer: B
Explanation:
To determine the annual energy cost savings from switching to LED luminaires:
NEW QUESTION # 32
A heat pump water heater has an annual average coefficient of performance (COP) of 2.1 and heats water from 15°C to 50°C. Hot water use is 100 liters per day, 365 days/yr. The electricity cost is $0.10/kWh. What is the annual water heating cost? (The specific heat of water (C) is 4.2 kJ/kg-°C.)
- A. $44.88/year
- B. $70.97/year
- C. $52.20/year
- D. $88.29/year
- E. $64.66/year
Answer: E
NEW QUESTION # 33
A fully-loaded heat pump unit delivers 36-kW thermal heating with a power draw of 12-kW electric. What is the coefficient of performance (COP) at full load?
- A. 3.0
- B. 2.0
- C. 6.0
- D. 4.0
- E. 5.0
Answer: D
NEW QUESTION # 34
An air-conditioning unit delivers 10,000 kJ/h (thermal cooling). The equipment uses single-phase electrical power at 220-volt and 5.25 amps with a power factor of 100%. Calculate the coefficient of performance (COP).
- A. 16.1
- B. 13.2
- C. 3.2
- D. 6.2
- E. 2.4
Answer: C
Explanation:
NEW QUESTION # 35
Which motor parameter is the most difficult to measure with precision?
- A. Alternating current (AC) frequency
- B. Input power
- C. Output power capacity
- D. Operating (rotating) speed
- E. Operating load factor
Answer: E
NEW QUESTION # 36
A 25-kW motor, at full load, drives a centrifugal fan that produces 160,000 liters per second (l/s) of ventilation air. If the fan speed is reduced to a flow rate of 150,000 l/s, what is the new load on the motor?
- A. 20.6 kW
- B. 30.3 kW
- C. 24.2 kW
- D. 15.2 kW
- E. 25.0 kW
Answer: A
NEW QUESTION # 37
Which of the following is NOT included in commissioning documentation?
- A. Equipment operations and maintenance manuals
- B. Financing payment structure reports
- C. Original facility and equipment design intent
- D. Equipment control sequence documentation
- E. As-built drawings
Answer: B
Explanation:
Commissioning documentation, per AEE CEM and ASHRAE Guideline 0, focuses on ensuring systems are designed, installed, operated, and maintained as intended.
Included commissioning documentation typically consists of:
* Original facility and equipment design intent (OPR/BOD)
* As-built drawings
* Equipment control sequence documentation
* Operations & Maintenance (O&M) manuals
Financing payment structure reports are related to project finance or performance contracting, not commissioning.
NEW QUESTION # 38
You can buy air compressor A for $15,000 or air compressor B for $6,000. Compressor A will cost $10,000 per year to operate. Compressor B will cost $11,500 per year to operate. If both air compressors have a 10- year life and your required return on investment is 12%, which air compressor has the lowest total life-cycle cost?
- A. Compressor A
- B. Compressor B
- C. Both air compressors have the same life-cycle cost
Answer: B
NEW QUESTION # 39
Lighting systems operate with a certain recoverable light loss factor. Control systems with photocell sensor inputs combined with dimming ballasts can be used to regulate dimming levels to maintain a continuous light level in the work space. Which of the following best describes this type of control?
- A. Closed-loop controller
- B. Demand-limiting controller
- C. Open-loop controller
- D. Two-position controller
Answer: A
NEW QUESTION # 40
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. Building height
- B. Outside air wind speed
- C. Poor or missing weatherstripping
- D. Fuel type used for heating and cooling
- E. Outside air temperature
Answer: D
NEW QUESTION # 41
Using the lumen method, calculate the number of luminaires (fixtures) required to light a room to 200 lux.
Each luminaire has 2 fluorescent lamps, 3,000 lumens per lamp. The room is 20 meters by 30 meters. The total light loss factor (LLF) is 0.70 and the luminaire coefficient of utilization (CU) is 0.80.
- A. 24 luminaires
- B. 60 luminaires
- C. 48 luminaires
- D. 12 luminaires
- E. 36 luminaires
Answer: A
NEW QUESTION # 42
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. 70.0 kW
- D. 46.7 kW
- E. 17.1 kW
Answer: A
NEW QUESTION # 43
Which type of lighting control technique operates in "manual on" and "auto-off mode, and can be used in situations where there is brief occupancy that do not need lights on?
- A. Photocell control
- B. PIR/Microphonics dual technology
- C. Vacancy sensor
- D. Occupancy sensor
- E. Microphonics technology
Answer: D
NEW QUESTION # 44
Which of the following instruments is most useful for tracking long-term boiler performance?
- A. The drum water level gauge
- B. The pressure gauge
- C. The boiler room ambient temperature sensor
- D. The feedwater temperature sensor
- E. The exhaust stack temperature sensor
Answer: E
NEW QUESTION # 45
What is the main cause of low power factor?
- A. Harmonics
- B. Fluorescent lighting
- C. Solar flares
- D. Computers and electronic equipment
- E. Low-load induction motors
Answer: E
NEW QUESTION # 46
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