LEED (Leadership in Energy and Environmental Design Certification) Water Efficiency 4

Question 1

Which LEED prerequisite requires a minimum 20% reduction in indoor water use compared to the baseline?

Accepted Answer

Indoor Water Use Reduction

Answer

The Indoor Water Use Reduction prerequisite in LEED v4 BD+C requires at least a 20% reduction in fixture water use compared to the EPAct 1992/ASME A112.19 baseline.

Question 2

A commercial building installs dual-flush toilets (0.8/1.28 gpf). How should LEED calculations treat the flush volume for this fixture?

Accepted Answer

Use a weighted average based on estimated flush frequency

Answer

LEED requires using a weighted average of half-flush and full-flush volumes based on anticipated usage ratios (typically 50/50 or 67/33) for dual-flush toilets.

Question 3

Which of the following is NOT a recognized non-potable water source under LEED Water Efficiency?

Accepted Answer

Water from dehumidification

Answer

While captured rainwater, HVAC condensate, and municipal reclaimed water are all recognized non-potable sources, dehumidification water is not explicitly listed as a recognized alternative source in LEED v4.

Question 4

What is the primary environmental benefit of reducing outdoor irrigation in LEED projects located in arid US regions?

Accepted Answer

Conserving scarce local water resources and reducing aquifer depletion

Answer

In arid regions, outdoor irrigation reduction directly conserves scarce local groundwater and surface water resources, preventing aquifer depletion and reducing pressure on municipal water supplies.

Question 5

A hospital is pursuing LEED certification. Which fixture type has a HIGHER baseline flow rate under LEED calculations compared to a typical office building?

Accepted Answer

Lavatory faucets in patient rooms (clinical)

Answer

Clinical/healthcare lavatory faucets used for hand washing near patient care areas may have higher baseline flow rates (2.2 gpm) compared to the 0.5 gpm used for private office lavatories.

LEED - Leadership in Energy and Environmental Design Certification Practice Test

LEED - Leadership in Energy and Environmental Design Certification Practice Test

LEED (Leadership in Energy and Environmental Design Certification) Water Efficiency 4