LEED-AP-ID-C Exam Questions and Answers

QUESTION: 11

A project has access to two alternative water sources. How should they determine which source to use where?

A project may not use two alternative water sources
Target the uses that require the least treatment first, such as toilet flushing or irrigation
Match uses by location: indoor sources to indoor uses, outdoor sources to outdoor uses
All sources should be treated to potable water standards and used to supplement the municipal supply

Answer(s): B

Explanation:

When a project has access to two alternative water sources, the strategy is to use the source that requires the least amount of treatment for applications where water quality is less critical. This approach is efficient and sustainable as it reduces the need for extensive treatment processes. For instance, using untreated rainwater for irrigation or treated greywater for toilet flushing makes practical and environmental sense.

Reference:

LEED v4: Interior Design + Construction Guide2

LEED v4 water efficiency credits and standards3

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QUESTION: 12

Source reduction appears at the top of the Environmental Protection Agency's (EPA's) hierarchy because it

reduces environmental impacts by reusing existing materials
reduces environmental impacts associated with material containing high levels of toxic chemicals
reduces environmental impacts throughout the material's life cycle by specifying recycled content in the material selected
reduces environmental impacts throughout the material's life cycle, from the supply chain and use to recycling and waste disposal

Answer(s): D

Explanation:

According to the EPA's hierarchy, source reduction is prioritized because it addresses the environmental impacts of materials across their entire life cycle. This includes the extraction of raw materials, manufacturing, distribution, usage, and end-of-life management, including recycling and disposal. By reducing the amount of material used, source reduction minimizes the environmental footprint throughout the entire process.

Reference:

The explanation aligns with the principles outlined in the EPA's waste management hierarchy, which emphasizes the importance of source reduction as the most preferred approach to managing materials and waste streams. This is also consistent with the sustainable materials management strategies detailed in the LEED v4 Reference Guide for Interior Design and Construction.

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QUESTION: 13

An owner has expressed concerns to the LEED AP about the costs associated with the integrative process. How can the LEED AP relieve the owner's concerns?

The LEED AP should explain to the owner that since the integrative process is not a prerequisite, it can be dropped from the project thus cutting back project costs
The LEED AP should explain that while the first costs and the design fees will be higher due to the integrative process, the operational savings will make up for the extra costs
The LEED AP should explain that the integrative process can easily be postponed and reconsidered until after the design for the construction phase, when it will most likely save costs for the project
The LEED AP should explain that the integrative process reduces costs by avoiding delays associated with design changes during the construction document phase and reducing change orders during construction

Answer(s): D

Explanation:

The integrative process is a strategy that can lead to both immediate and long-term cost savings. By engaging in early analysis of the interrelationships among systems, the project team can identify unique opportunities and challenges. This early engagement helps to optimize the design, which can reduce the time and cost associated with making design changes later in the project and minimize the need for change orders during construction.

Reference:

Understanding Integrative Design in LEEDv4 - BuildingGreen. LEED v4 for Interior Design and Construction (ID+C): Reference Guide. New LEED Integrative Process Credit Encourages Design-Build.

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QUESTION: 14

To satisfy the Increased Ventilation strategy in the Indoor Environmental Quality Credit, Enhanced Indoor Air Quality Strategies, the breathing zone rates of outdoor air ventilation to all occupied spaces must be increased above the minimum rates required in ASHRAE 62.1-2010 by at least what percentage?

10%
20%
30%
50%

Answer(s): C

Explanation:

To meet the Increased Ventilation strategy under the Enhanced Indoor Air Quality Strategies credit, the breathing zone outdoor air ventilation rates must be increased by at least 30% above the minimum rates required by ASHRAE 62.1-2010. This increase is intended to improve indoor air quality and promote a healthier indoor environment.

Reference:

The LEED v4 reference guide for Interior Design and Construction includes this requirement as part of the strategies to enhance indoor air quality.

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QUESTION: 15

Which of the following phases should be included in the Integrative Process Credit, Integrative Process in order to comply with the intent of this credit?

Discovery; design and construction; occupancy; operations and feedback
Discovery and design; construction and occupancy; post occupancy and operations
Pre-design and design; construction and occupancy; post occupancy and operations
Pre-design and design; construction and pre-occupancy; post occupancy and operations

Answer(s): A

Explanation:

The Integrative Process Credit under LEED AP Interior Design + Construction V4 emphasizes the importance of a holistic approach that includes various phases of a project. The correct phases that should be included to comply with the intent of this credit are Discovery, Design and Construction, Occupancy, Operations, and Feedback. This approach ensures that sustainable strategies are integrated from the earliest stages of the project and continue through to post-occupancy to maximize performance and sustainability.

Reference:

The LEED v4 Reference Guide for Interior Design and Construction provides detailed guidance on the Integrative Process Credit, highlighting the need for a comprehensive approach that spans the entire project timeline.

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US Green Building Council LEED-AP-ID-C Exam (page: 3) US Green Building Council LEED AP Interior Design + Construction V4 Updated on: 12-Feb-2026

QUESTION: 11

Explanation:

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QUESTION: 12

Explanation:

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QUESTION: 13

Explanation:

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QUESTION: 14

Explanation:

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QUESTION: 15

Explanation:

Reference:

US Green Building Council LEED-AP-ID-C Exam (page: 3)
US Green Building Council LEED AP Interior Design + Construction V4
Updated on: 12-Feb-2026