LEED-AP-BD+C USGBC Exam Lab Questions

This option requires the project to classify wood derived fuel as a recycled material that contributes towards the credit, because it is a waste material that is converted into a useful energy source1. Wood derived fuel can be used for heating, electricity generation, or co-firing with other fuels2. According to the LEED V5: Building Design + Construction Guide, recycled materials are those that have been reprocessed or remanufactured from recovered materials3.

The strategy that will contribute toward the Interior Cross-Contamination Prevention strategy in Indoor Environmental Quality Credit, Enhanced Indoor Air Quality Strategies is to provide a ventilation system specifically for the laundry facility that has no recirculating air. This is because the laundry facility is a space where hazardous gases or chemicals may be present or used, such as detergents, bleach, or fabric softeners. According to the LEED V5 Reference Guide for Building Design and Construction, the project must "sufficiently exhaust each space where hazardous gases or chemicals may be present or used (e.g., garages, housekeeping and laundry areas, copying and printing rooms), using the exhaust rates determined in EQ Prerequisite Minimum Indoor Air Quality Performance or a minimum of 0.50 cfm per square foot (2.54 l/s per square meter), to create negative pressure with respect to adjacent spaces when the doors to the room are closed. For each of these spaces, provide self-closing doors and deck-to-deck partitions or a hard-lid ceiling." 1 Therefore, option D is the correct answer. The other options will not prevent cross-contamination from the laundry facility to the locker rooms. Relocating the laundry facility to the basement (option A) may reduce the exposure of the occupants to the laundry chemicals, but it will not eliminate the possibility of cross-contamination to other spaces in the basement. Naturally ventilating the laundry space per ASHRAE 62.1-2010 (option B) may not provide sufficient exhaust to create negative pressure and prevent cross-contamination, especially if the outdoor air quality is poor or the natural ventilation is not well designed. Installing particle filters, with a MERV of 13 or higher or F7 (option C) may improve the air quality in the laundry space, but it will not prevent the hazardous gases or chemicals from escaping to the adjacent spaces through the ventilation system or the gaps in the doors or ceiling. References : LEED V5 Reference Guide for Building Design and Construction, p. 688 1 ; ASHRAE Standard 62.1-2010, Section 6.2.5 2

Light pipes transport daylight from the roof or exterior envelope into enclosed interior areas that would otherwise depend heavily on electric lighting. This can improve the occupant lighting environment by providing access to natural light while reducing lighting-energy consumption. Lower electric-lighting demand can also reduce internal heat gains and associated cooling loads. Open community spaces and preservation of site topography primarily support social and ecological outcomes rather than the lighting-environment option. Double-glazed windows improve envelope performance and thermal comfort, but the stated strategy does not necessarily improve lighting quality in enclosed spaces. Light pipes therefore demonstrate a direct synergy: the same design measure enhances visual conditions for occupants and contributes to reduced building energy demand.

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