USGBC Updated LEED-Green-Associate Exam Questions and Answers by lawson

ENERGY STAR is a program run by the U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy that promotes energy efficiency. Products that earn the ENERGY STAR label meet strict criteria for energy efficiency and often for water efficiency as well, helping consumers save money on utility bills and protect the environment through energy-efficient products and practices. References: LEED Green Associate Candidate Handbook, U.S. Green Building Council resources

A neighborhood that includes a diversity of uses is most appropriate to encourage a walkable street design. A diversity of uses means that different types of activities and functions are located within walking distance of each other, such as residential, commercial, retail, educational, recreational, cultural, and civic uses. A diversity of uses creates a vibrant and lively neighborhood that attracts pedestrians and supports social interaction. A walkable street design also incorporates elements such as sidewalks, crosswalks, street trees, lighting, benches, bike lanes, public transit stops, and reduced vehicle speeds to enhance pedestrian safety and comfort. The other options are not appropriate to encourage a walkable street design. An area with a decreased building-height-to-street-width ratio creates a wide and open street that exposes pedestrians to more sun and wind, reducing their comfort level. A development that uses many culs-de-sac in the street design creates a disconnected and irregular street network that limits pedestrian access and mobility. A project in an area designed with streets to facilitate increased speed limits prioritizes vehicle movement over pedestrian safety and comfort. References: LEED Green Associate Candidate Handbook, page 29; USGBC [Location & Transportation], page 2-3.

R-12 is the correct answer because it is a chlorofluorocarbon (CFC) refrigerant, and CFCs are known for high Ozone Depletion Potential. LEED Energy and Atmosphere includes refrigerant management requirements to reduce damage to the stratospheric ozone layer and limit climate impacts from HVAC & R systems. New LEED projects must avoid CFC-based refrigerants in new HVAC & R systems, and existing systems with CFCs generally require replacement, retrofit, or a phase-out plan. R-134a and R-410A are non-CFC refrigerants and do not have the same ozone depletion impact as CFCs, though they may still have global warming impacts. Ammonia has no ozone depletion potential but has safety and application considerations.

The Integrative Process is most effective during the early design stage of a project. This is when key decisions about the project are being made that can have a significant impact on its sustainability performance. By considering sustainability objectives from the outset, teams can identify opportunities for synergies and cost savings that may not be apparent later in the project. References: LEED Green Associate Candidate Handbook, U.S. Green Building Council resources