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USGBC LEED-AP-Homes Exam Syllabus Topics:

Topic	Details
Topic 1	Materials & Resources: This section of the exam measures the skills of a Sustainability Specialist. It emphasizes the selection and management of eco-friendly materials, efficient usage of resources, and implementation of waste reduction strategies to support green residential construction.
Topic 2	Regional Priority Credits: This section of the exam measures the skills of a Regional Performance Advisor. It covers specific environmental credits that reflect local priorities, enabling tailored certification strategies that align with regional ecosystems or regulatory contexts.
Topic 3	Location & Transportation: This section of the exam measures the skills of an Environmental Planner. It focuses on how homes integrate with their surroundings and connect to transportation networks, emphasizing sustainable siting strategies aligned with urban planning practices.

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USGBC LEED AP Homes (Residential) Exam Sample Questions (Q10-Q15):NEW QUESTION # 10
A project team is pursuing Water Efficiency Credit, Outdoor Water Use. The site contains a total of 57,500 ft² (5,342 m²) of softscape.
What ratio of turf grass and native or adapted landscape is required to achieve four points for this credit? (Refer to the table below)  Turf grass area Native or adapted plant area Points
< 60%
> 25%
1
< 40%
> 50%
2
< 20%
> 75%
3
< 5%
> 75%
4

• A. 12,600 ft² (1,171 m²) turf grass and 40,000 ft² (3,716 m²) native or adapted landscape
• B. 4,500 ft² (418 m²) turf grass and 44,000 ft² (4,088 m²) native or adapted landscape
• C. 2,500 ft² (232 m²) turf grass and 44,000 ft² (4,088 m²) native or adapted landscape
• D. 11,500 ft² (1,068 m²) turf grass and 40,000 ft² (3,716 m²) native or adapted landscape
  

Answer: C
Explanation:
TheLEED for Homes Rating System (v4)includes theWater Efficiency (WE) Credit: Outdoor Water Use, which awards points based on the ratio of turf grass (high water use) to native or adapted plants (low water use) in the softscape to reduce irrigation needs.
According to theLEED Reference Guide for Homes Design and Construction (v4):
WE Credit: Outdoor Water Use (1-4 points)
Reduce outdoor water use by selecting native or adapted plants and limiting turf grass. Points are awarded based on the percentage of softscape area:
* < 5% turf grass and > 75% native or adapted plants: 4 points.The total softscape area is used to calculate the percentages of turf grass and native/adapted plants.Source: LEED Reference Guide for Homes Design and Construction, v4, Water Efficiency Credit: Outdoor Water Use, p. 98-99.
TheLEED v4.1 Residential BD+Crating system confirms:
WE Credit: Outdoor Water Use
Achieve 4 points by ensuring less than 5% of the softscape is turf grass and more than 75% is native or adapted plants, based on area calculations.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Calculation for 4 points:
* Total softscape area: 57,500 ft².
* For 4 points:
* Turf grass: < 5% of 57,500 ft² = < 0.05 × 57,500 = < 2,875 ft².
* Native or adapted plants: > 75% of 57,500 ft² = > 0.75 × 57,500 = > 43,125 ft².
Evaluate options:
* A. 12,600 ft² turf grass and 40,000 ft² native or adapted:
* Turf grass: 12,600 / 57,500 = 21.91% (> 5%).
* Native: 40,000 / 57,500 = 69.57% (< 75%).
* Does not meet 4-point criteria (only qualifies for 1 point: < 60% turf, > 25% native).
* B. 11,500 ft² turf grass and 40,000 ft² native or adapted:
* Turf grass: 11,500 / 57,500 = 20% (> 5%).
* Native: 40,000 / 57,500 = 69.57% (< 75%).
* Does not meet 4-point criteria (qualifies for 2 points: < 40% turf, > 50% native).
* C. 2,500 ft² turf grass and 44,000 ft² native or adapted:
* Turf grass: 2,500 / 57,500 = 4.35% (< 5%).
* Native: 44,000 / 57,500 = 76.52% (> 75%).
* Meets 4-point criteria.
* D. 4,500 ft² turf grass and 44,000 ft² native or adapted:
* Turf grass: 4,500 / 57,500 = 7.83% (> 5%).
* Native: 44,000 / 57,500 = 76.52% (> 75%).
* Does not meet 4-point criteria (qualifies for 3 points: < 20% turf, > 75% native).
Answer Option C(2,500 ft² turf grass and 44,000 ft² native or adapted landscape) meets the requirements for 4 points.
TheLEED AP Homes Candidate Handbookemphasizes WE credits, including outdoor water use, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of the table's criteria.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Water Efficiency Credit:
Outdoor Water Use, p. 98-99.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org/resources/ ... and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming softscape ratios.

NEW QUESTION # 11
Envelope leakage is minimized by:

• A. Conducting a blower door test.
• B. Installing a continuous air barrier.
• C. Specifying HERS Grade II Insulation.
• D. Installing a drainage plane.
  

Answer: B
Explanation:
Minimizing envelope leakage is a critical component of improving energy efficiency in homes, as it reduces unintended air infiltration and exfiltration through the building envelope. This concept is addressed in the LEED for Homes Rating System (v4)under theEnergy and Atmosphere (EA)category, specifically in credits related toAir InfiltrationandBuilding Envelope Performance.
According to theLEED Reference Guide for Homes Design and Construction (v4), the primary method to minimize envelope leakage is to install acontinuous air barrier:
EA Prerequisite: Minimum Energy Performance
To reduce air infiltration, projects must include a continuous air barrier system that is sealed at all penetrations, joints, and interfaces to prevent air leakage. The air barrier must be installed around the entire building envelope, including walls, roofs, and floors.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Prerequisite: Minimum Energy Performance, p. 112.
Additionally, theLEED v4.1 Residential BD+Crating system reinforces this requirement:
EA Credit: Air Infiltration
Install a continuous air barrier system to control air leakage through the building envelope. The air barrier must be airtight, durable, and continuous, with all seams, penetrations, and transitions sealed.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Acontinuous air barrieris a system of materials (e.g., house wraps, sealed drywall, or spray foam) that forms a complete barrier to air movement, significantly reducing energy losses due to leakage. This is a proactive design and construction strategy to achieve energy efficiency goals.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, Sustainable Sites Credit:
Rainwater Management, p. 76, which discusses drainage planes in the context of moisture control.
B). Conducting a blower door test: A blower door test is a diagnostic tool used tomeasureair leakage in a building, not to minimize it. It quantifies the air tightness of the envelope (in air changes per hour, ACH) but does not physically reduce leakage. It is required for verification in LEED v4 (EA Credit: Air Infiltration) but is not a solution for minimizing leakage.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Air Infiltration, p. 124.
D). Specifying HERS Grade II Insulation: HERS (Home Energy Rating System) insulation grades refer to the quality of insulation installation, with Grade II indicating moderate defects. While proper insulation reduces conductive heat loss, it does not directly address air leakage, which is managed by the air barrier system.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Insulation, p.
120, which discusses HERS insulation grades but not air leakage.
TheLEED AP Homes Candidate Handbookemphasizes the importance of understanding EA credits, including air infiltration, for the exam, referencing theLEED Reference Guide for Homes Design and Constructionas a key study resource. The handbook confirms that the exam is based onLEED v4, ensuring the relevance of the continuous air barrier requirement.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere Prerequisite: Minimum Energy Performance, p. 112, and EA Credit: Air Infiltration, p. 124.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming air barrier requirements.

NEW QUESTION # 12
In order to take advantage of mountain views, a designer would like to include large glazing areas in a new home. Energy and Atmosphere Credit, Windows requires more stringent window performance if the:

• A. Window-to-exterior wall area ratio is greater than 15%
• B. Window-to-exterior wall area ratio is greater than 24%
• C. Window-to-floor area ratio is greater than 24%
• D. Window-to-floor area ratio is greater than 15%
  

Answer: B
Explanation:
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Windows, which sets performance requirements for windows to balance energy efficiency with design goals, such as large glazing areas for views. Higher window-to-wall ratios require more stringent performance to mitigate heat loss or gain.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Windows (1-3 points)
Meet the prescriptive window performance requirements based on the window-to-exterior wall area ratio (WWR). If the WWR exceeds 24%, more stringent U-factor and solar heat gain coefficient (SHGC) values are required to ensure energy efficiency.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit:
Windows, p. 122.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Windows
For projects with a window-to-exterior wall area ratio greater than 24%, windows must meet enhanced performance criteria (e.g., lower U-factor and SHGC) to reduce energy losses.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer iswindow-to-exterior wall area ratio is greater than 24%(Option C), as this triggers stricter window performance requirements to maintain energy efficiency.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Windows, p. 122.
B). Window-to-floor area ratio is greater than 15%: The credit uses window-to-exterior wall ratio, not window-to-floor ratio, for performance criteria.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Windows, p. 122.
D). Window-to-floor area ratio is greater than 24%: The credit does not reference window-to-floor ratio; the 24% threshold applies to window-to-wall ratio.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Windows, p. 122.
TheLEED AP Homes Candidate Handbookemphasizes EA credits, including window performance, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of the 24% WWR threshold.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere Credit: Windows, p. 122.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via USGBC LEED Online (https://www.usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming window performance criteria.

NEW QUESTION # 13
Which of the following power needs requires special consideration at the design phase?

• A. ENERGY STAR appliances
• B. Continuously operating bathroom fans
• C. 220-volt supply to laundry room
• D. Electric vehicle charging station
  

Answer: D
Explanation:
TheLEED for Homes Rating System (v4)encourages planning for energy-efficient and sustainable technologies during the design phase, particularly for significant electrical loads that impact infrastructure, as addressed in credits likeEnergy and Atmosphere (EA) Credit: Optimize Energy Performance.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Optimize Energy Performance
Design the home to accommodate high-efficiency systems and emerging technologies, such as electric vehicle (EV) charging stations, which require dedicated electrical capacity (e.g., 240-volt circuits) and planning during the design phase to ensure adequate panel capacity and conduit placement.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit:
Optimize Energy Performance, p. 118.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Optimize Energy Performance
Electric vehicle charging stations require special consideration in the design phase, including dedicated circuits and infrastructure to support high-voltage, high-amperage loads, ensuring future scalability and energy efficiency.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Anelectric vehicle charging station(Option D) requires special consideration during the design phase due to its high power demand (typically 240 volts, 30-50 amps), necessitating dedicated circuits, panel capacity upgrades, and potential conduit or wiring planning to avoid costly retrofits.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Enhanced Ventilation, p. 146.
B). 220-volt supply to laundry room: While a 220-volt circuit is common for dryers, it is standard in residential design and does not require special consideration beyond typical electrical planning.Reference: No specific LEED requirement for laundry circuits.
C). ENERGY STAR appliances: These focus on efficiency and do not require unique electrical infrastructure beyond standard outlets.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: High-Efficiency Appliances, p. 136.
TheLEED AP Homes Candidate Handbookemphasizes EA credits, including energy-efficient design, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of EV charging considerations.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere Credit: Optimize Energy Performance, p. 118.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming EV charging design needs.

NEW QUESTION # 14
The owner is considering a fireplace in a new house and is pursuing LEED for Homes certification. Which type of fireplace, if any, should be installed in order to achieve the maximum credit for Indoor Environmental Quality Credit, Enhanced Combustion?

• A. Masonry wood-burning fireplace
• B. Install no fireplace
• C. EPA-certified woodstove
• D. Factory-built wood-burning fireplace with catalytic combustor
  

Answer: B
Explanation:
TheLEED for Homes Rating System (v4)includes theIndoor Environmental Quality (EQ) Credit:
Enhanced Combustion Venting, which awards points for minimizing indoor air quality risks from combustion appliances, including fireplaces. Avoiding combustion appliances altogether is the most effective way to achieve the maximum credit.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Enhanced Combustion Venting (1 point)
To achieve the maximum credit, install no combustion appliances, including fireplaces, to eliminate the risk of combustion byproducts (e.g., carbon monoxide) entering the home. If fireplaces are installed, they must be direct-vented or power-vented with doors. EPA-certified woodstoves or factory-built fireplaces with catalytic combustors reduce emissions but do not achieve the maximum credit compared to no fireplace.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Enhanced Combustion Venting, p. 144.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Credit: Enhanced Combustion Venting
The highest level of compliance is achieved by installing no combustion appliances, including fireplaces. If fireplaces are used, they must be sealed and vented, but avoiding fireplaces maximizes indoor air quality protection.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isinstall no fireplace(Option A), as this eliminates combustion risks entirely, achieving the maximum credit for Enhanced Combustion Venting.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Enhanced Combustion Venting, p. 144.
C). Masonry wood-burning fireplace: These are less efficient and produce more emissions, not meeting the credit's stringent requirements.Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Enhanced Combustion Venting, p. 144.
D). Factory-built wood-burning fireplace with catalytic combustor: While improved, it still involves combustion and does not achieve the maximum credit compared to no fireplace.Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Enhanced Combustion Venting, p. 144.
TheLEED AP Homes Candidate Handbookemphasizes EQ credits, including combustion venting, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of avoiding fireplaces for maximum credit.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Indoor Environmental Quality Credit: Enhanced Combustion Venting, p. 144.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming combustion venting criteria.

NEW QUESTION # 15
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