CSC Sustainable Design & Green Building Practices 3 — Questions and Answers
Question 1: Which biophilic design element has been shown in research to most directly reduce occupant stress and improve cognitive performance?
- Use of natural wood textures on surfaces
- Views of nature and access to daylight (Correct answer)
- Incorporation of nature-inspired geometric patterns
- Water features producing ambient sound
Correct answer: Views of nature and access to daylight
Multiple peer-reviewed studies link views of natural landscapes and access to daylight with measurable reductions in cortisol levels and improvements in cognitive function and productivity.
Question 2: A sustainable designer specifies recycled-content steel for structural framing. Which environmental product declaration (EPD) type provides the most credible third-party data for this material?
- Type I: eco-label
- Type II: self-declared claim
- Type III: third-party verified EPD (Correct answer)
- Type IV: industry average EPD
Correct answer: Type III: third-party verified EPD
Type III EPDs, verified by an independent third party against ISO 14025, provide transparent, lifecycle-assessment-based environmental data that is most credible for specification decisions.
Question 3: What is the primary goal of an integrated design process (IDP) in sustainable construction?
- Reducing construction timelines by overlapping design phases
- Enabling all disciplines to collaborate from project inception to optimize whole-system performance (Correct answer)
- Standardizing material specifications across all trades
- Ensuring code compliance before design begins
Correct answer: Enabling all disciplines to collaborate from project inception to optimize whole-system performance
IDP brings architects, engineers, contractors, and owners together from the earliest design phases so that decisions about one system (e.g., mechanical) can be optimized in relation to all others (e.g., envelope, lighting).
Question 4: Which passive cooling strategy uses the principle of radiative heat loss to the night sky to cool thermal mass?
- Evaporative cooling
- Night flush (night purge) ventilation
- Night sky radiant cooling (Correct answer)
- Earth-coupled cooling
Correct answer: Night sky radiant cooling
Night sky radiant cooling exposes high-mass surfaces to the clear night sky, allowing them to emit longwave radiation and cool down for use as a heat sink the following day.
Question 5: Under the International Green Construction Code (IgCC), which approach is used to set energy performance requirements?
- Prescriptive-only path with fixed efficiency values
- Outcome-based path tied to metered energy use intensity
- Both prescriptive and performance paths are available (Correct answer)
- A point-based scoring system similar to LEED
Correct answer: Both prescriptive and performance paths are available
The IgCC offers both a prescriptive compliance path and a performance path (typically via energy modeling), giving designers flexibility while ensuring equivalent outcomes.
Question 6: A project team wants to minimize heat island effect on a commercial parking structure. Which combination of strategies is MOST effective?
- Dark pavement with underground cisterns
- High-albedo (cool) paving and shading from tree canopy or PV canopy (Correct answer)
- Permeable pavement alone
- White roof coating on top deck only
Correct answer: High-albedo (cool) paving and shading from tree canopy or PV canopy
Combining high-reflectance paving with overhead shading (trees or solar canopies) addresses both surface temperature reduction and solar interception, making it the most comprehensive approach.
Question 7: In mass timber construction, what is the primary sustainability advantage of cross-laminated timber (CLT) compared to concrete structural systems?
- Higher compressive strength per unit weight
- Long-term carbon sequestration in the building structure (Correct answer)
- Easier seismic retrofitting
- Lower initial material cost
Correct answer: Long-term carbon sequestration in the building structure
Wood sequesters atmospheric carbon dioxide as it grows, and CLT panels lock that carbon into the building structure for the life of the building, unlike concrete which has high embodied carbon.
CSC Sustainable Design & Green Building Practices 3
Which biophilic design element has been shown in research to most directly reduce occupant stress and improve cognitive performance?