A garage infill pour covers 18 feet by 30 feet at a 5-inch thickness. About how many cubic yards are needed before waste?
Correct Answer
D) 8.34 cubic yards.
Five inches is 0.417 feet. The volume is 18 x 30 x 0.417 = 225.18 cubic feet, and 225.18 / 27 = 8.34 cubic yards.
Why This Is the Correct Answer
Five inches is 0.417 feet. The volume is 18 x 30 x 0.417 = 225.18 cubic feet, and 225.18 / 27 = 8.34 cubic yards.
Why the Other Options Are Wrong
Option A: 7.22 cubic yards.
7.22 cubic yards. is below the supported result for concrete quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 7.84 cubic yards total.
7.84 cubic yards total. is below the supported result for concrete quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 8.00 cubic yards total.
8.00 cubic yards total. is below the supported result for concrete quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Memory Technique
Estimating Small takeoff: count the condition before counting the package.
Reference Hint
Study anchor (closed-book): memorize Concrete quantity calculation from California Building Code, California Code of Regulations Title 24. / Title 24 California Building Code concrete quantity concepts; know the rule or calculation trigger without relying on exam-room lookup.
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