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  1. Home
  2. USGBC Certification
  3. LEED-AP-BD-C Exam
  4. USGBC.LEED-AP-BD-C.v2025-12-01.q236 Dumps
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Question 81

To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate

Correct Answer: C
Explanation
To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate that all luminaires meet acceptable fixture ratings for the project's Model Lighting Ordnance (MLO) lighting zone. The MLO lighting zone is determined by the site-specific characteristics and the definitions provided in the IES/IDA MLO User Guide1. The fixture ratings are based on the backlight-uplight-glare (BUG) system, which measures the amount of light emitted in different directions by a luminaire, as defined in IES TM-15-11, Addendum A2. The maximum allowable ratings for each lighting zone are given in Table 1 of the credit language3. References: IES/IDA MLO User Guide; IES TM-15-11, Addendum A; Light pollution reduction
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Question 82

When calculating the reverberation time of a room, which of the following pieces of information is least relevant?

Correct Answer: D
When calculating the reverberation time of a room, the operating sound level of the nearest HVAC equipment is the least relevant piece of information. The reverberation time is the time it takes for the sound to decay by 60 decibels after the source stops emitting sound. The reverberation time depends on the volume and the surface area of the room, as well as the sound absorption coefficients of the materials that cover the surfaces. The height and width of the room are needed to calculate the volume and the surface are a. The noise reduction coefficient of the ceiling surface and the sound absorption coefficient of the floor surface are needed to calculate the total sound absorption of the room. The operating sound level of the nearest HVAC equipment is not relevant for calculating the reverberation time, but it may affect the background noise level and the speech intelligibility in the room.
Reference:
* LEED v4 Reference Guide for Building Design and Construction, Indoor Environmental Quality Credit: Acoustic Performance, page 7101
* Sounds of Silence: Acoustic Performance in LEED v4.12
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Question 83

A Healthcare Project is constructing a new building adjacent to an existing LEED Certified hospital facility. The new building's location is on the same hospital campus as the certified facility. The entire hospital campus was analyzed with an Environmental Site Assessment (ESA) as part of the certified facility's project scope. The new building project needs to complete a new Phase I ESA if

Correct Answer: D
. the local equivalent standard is more stringent than ASTM E1527-05
According to the LEED v4 Reference Guide for Building Design and Construction, a Phase I ESA is required for all projects, except for those located on previously developed land that has not been used for industrial, commercial, or agricultural purposes. The Phase I ESA must follow the ASTM E1527-05 standard or a local equivalent. However, if the local equivalent is more stringent than the ASTM standard, then the project must comply with the local equivalent. Therefore, if the new building project is located in a jurisdiction that has a more rigorous standard for Phase I ESA than ASTM E1527-05, then it must complete a new Phase I ESA, regardless of the previous ESA done for the certified facility.
Reference:
Reference Guide for Building Design and Construction v4 - Pages 81-821
LEED v4: Building Design + Construction Guide - U.S. Green Building Council2
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Question 84

What standard should an engineer use when establishing minimum ventilation rates for a new mechanically ventilated space to earn Indoor Environmental Quality, Minimum Indoor Air Quality Performance?

Correct Answer: B
ASHRAE 62.1-2010 is the standard that an engineer should use when establishing minimum ventilation rates for a new mechanically ventilated space to earn Indoor Environmental Quality, Minimum Indoor Air Quality Performance. This is the standard referenced by the LEED v4 BD+C Reference Guide for this prerequisite. Local building code, International Mechanical Code 2012, and the ventilation code requiring the greatest volume of outside air are not acceptable alternatives for this prerequisite.
Reference: LEED v4 BD+C Reference Guide, Indoor Environmental Quality Category, EQp Minimum Indoor Air Quality Performance, page 674.
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Question 85

Which of the following is required for a cooling tower or evaporative condenser in Water Efficiency Prerequisite, Indoor Water Use Reduction?

Correct Answer: D
Explanation
Makeup water meters, conductivity controllers and overflow alarms
According to the Water Efficiency Prerequisite for Indoor Water Use Reduction, cooling towers and evaporative condensers must be equipped with makeup water meters, conductivity controllers and overflow alarms to reduce water consumption and prevent water waste. These devices help monitor and control the water quality, flow rate and level of the cooling system, and alert the operators of any malfunctions or leaks.
References: As per the LEED AP Building Design + Construction (LEED AP BD+C) V4 resources, the installation of makeup water meters, conductivity controllers and overflow alarms is a requirement for cooling towers and evaporative condensers under the Water Efficiency Prerequisite for Indoor Water Use Reduction.
This prerequisite aims to reduce indoor water consumption by setting baseline and efficiency standards for fixtures, fittings, appliances, equipment and processes. For cooling towers and evaporative condensers, the prerequisite also requires efficient drift eliminators that reduce drift to a maximum of 0.002% of recirculated water volume for counterflow towers and 0.005% of recirculated water flow for cross-flow towers. For more detailed information, you can refer to the web-based reference guide in the credit library at USGBC's official website.
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