A room is 18 feet by 16 feet and needs subfloor panels. Using 4-foot by 8-foot panels, how many panels are needed before waste?
Correct Answer
A) 9 panels.
The floor area is 288 square feet. Each panel is 32 square feet, so 288 / 32 = 9 panels.
Why This Is the Correct Answer
The floor area is 288 square feet. Each panel is 32 square feet, so 288 / 32 = 9 panels.
Why the Other Options Are Wrong
Option B: 8 panels.
8 panels. is below the supported result for subfloor quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 10 panels.
10 panels. is above the supported result for subfloor quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 12 panels.
12 panels. is above the supported result for subfloor quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Subfloor Quantity cart for Estimating Sheathing: floor first, area second, whole the controlling choice last.
Reference Hint
Study anchor (closed-book): memorize Subfloor quantity calculation from California Residential Code, California Code of Regulations Title 24. / Title 24 California Residential Code floor sheathing quantity concepts; know the rule or calculation trigger without relying on exam-room lookup.
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