US Green Building Council LEED-Green-Associate Exam Actual Questions

A closed system is a type of approach that promotes the conservation of materials and resources by linking elements in order to form relationships with their function1.A closed system is one that does not exchange matter or energy with its surroundings, and therefore minimizes waste and maximizes efficiency2.A closed system aims to achieve a circular economy, where resources are reused, recycled, or recovered, rather than disposed of3.A closed system can also enhance resource productivity, reduce environmental impacts, and foster innovation4.

Zero Waste Definition

Closed system | physics

Material Resources, Productivity and the Environment

Sustainable Materials Management: The Road Ahead

The percentage rule is a method to determine the most appropriate LEED rating system for a project when several rating systems may be applicable1.To use this rule, first assign a rating system to each square foot or square meter of the building, and then choose the most appropriate rating system based on the resulting percentages1.The entire gross floor area of a LEED project must be certified under a single rating system and is subject to all prerequisites and attempted credits in that rating system1.The percentage rule states that if one rating system covers more than 60% of the gross floor area, that rating system should be used1.If no rating system covers more than 60% of the gross floor area, but one covers more than 40%, then that rating system should be used1.If no rating system covers more than 40% of the gross floor area, then the project team can choose any applicable rating system1. Therefore, the answer is B. 40/60 rule.

LEED rating system selection guidance

The LEED rating systems reference the standards of various organizations that are relevant to green building design, construction, and operation. The National Fire Protection Association (NFPA) is one of these organizations, and its standards cover topics such as fire safety, electrical safety, emergency power systems, and fire suppression systems. The LEED rating systems reference the NFPA standards in several credits and prerequisites, such as Minimum Energy Performance, Minimum Indoor Air Quality Performance, and Environmental Tobacco Smoke Control.

LEED rating system

LEED rating system selection guidance

What is LEED certification?

LEED - Wikipedia

Volatile organic compounds (VOCs) are compounds that have a high vapor pressure and low water solubility, and are emitted as gases from certain solids or liquids1.VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects2.Concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors2.VOCs are emitted by a wide array of products, such as paints, solvents, cleaners, fuels, pesticides, building materials, office equipment, etc2.Breathing VOCs can irritate the eyes, nose and throat, can cause difficulty breathing and nausea, and can damage the central nervous system and other organs3.Some VOCs can cause cancer3. Therefore, VOCs negatively impact the quality of indoor air, which is option B.

Sizing the building appropriately means designing the building to meet the needs and expectations of the occupants, without creating excess space that would require more energy to heat, cool, and light. This strategy reduces the energy demand of the building and also saves on construction costs and materials.

LEED v4 for Building Design and Construction, p. 36

LEED Green Associate Candidate Handbook, p. 11