A LEED project requires tracking the recycled content of materials. The project uses 1000 tons of concrete with 20% fly ash content and 500 tons of steel with 90% recycled content. What is the total weight of recycled content materials?
Correct Answer
C) 650 tons
Concrete recycled content: 1000 tons × 20% = 200 tons. Steel recycled content: 500 tons × 90% = 450 tons. Total recycled content: 200 + 450 = 650 tons.
Why This Is the Correct Answer
Option C is correct because it properly calculates the recycled content for each material separately and then sums them. For concrete: 1000 tons × 20% = 200 tons of recycled content (fly ash). For steel: 500 tons × 90% = 450 tons of recycled content. The total recycled content is 200 + 450 = 650 tons, which represents the actual weight of recycled materials used in the project.
Why the Other Options Are Wrong
Option A: 200 tons
Option A only accounts for the recycled content in concrete (200 tons) but completely ignores the recycled content in steel (450 tons), resulting in an incomplete calculation.
Option B: 450 tons
Option B only accounts for the recycled content in steel (450 tons) but ignores the recycled content from the fly ash in concrete (200 tons), missing a significant portion of the total.
Option D: 1350 tons
Option D incorrectly adds the total weight of both materials (1000 + 500 = 1500 tons) minus some arbitrary amount, rather than calculating the actual recycled content percentages of each material.
Memory Technique
Remember 'PTA' - Percentage × Total = Amount for each material, then Add all amounts together. Don't confuse total material weight with recycled content weight.
Reference Hint
LEED Reference Guide for Building Design and Construction, Materials and Resources section, or Florida Building Code Chapter on Sustainable Construction practices
More Contract Admin Questions
A project experiences a 30-day delay due to unusually severe weather. The contract includes a liquidated damages clause of $1,000 per day for delays. If the weather delay is excusable but not compensable, what liquidated damages apply?
A commercial project requires a total of 12 inspections. The building department charges $85 per inspection for the first 5 inspections, $65 for inspections 6-10, and $45 for any additional inspections. What is the total inspection fee?
What document must be posted at the job site before a Certificate of Occupancy can be issued for a commercial building?
A mixed-use development requires a variance for reduced setbacks. The property is located within 500 feet of a hospital. What additional consideration must be addressed?
A LEED project requires tracking of regional materials. Materials are considered regional if they are extracted, harvested, or recovered, as well as manufactured within what distance of the project site?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Project Management
60 questions · 70% to pass
Previous Question
An owner disputes a contractor's claim for additional compensation due to design changes. The contract specifies that disputes must first go to mediation, then arbitration. What is the contractor's required next step?
Next Question
A general contractor is building a 50,000 square foot warehouse. The building permit fee is calculated at $8.50 per 1,000 square feet or fraction thereof. What is the total permit fee?