A building pad needs 150 compacted cubic yards of fill. If the borrow material shrinks 10 percent after compaction, about how many loose cubic yards should be hauled in?
Correct Answer
D) 167 loose cubic yards.
If loose material loses 10 percent in compaction, the compacted amount is 90 percent of loose volume. Divide 150 by 0.90.
Why This Is the Correct Answer
If loose material loses 10 percent in compaction, the compacted amount is 90 percent of loose volume. Divide 150 by 0.90.
Why the Other Options Are Wrong
Option A: 135 loose cubic yards.
135 loose cubic yards. is below the supported result for earthwork quantity conversion; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 150 loose cubic yards.
150 loose cubic yards. is below the supported result for earthwork quantity conversion; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 158 loose cubic yards.
158 loose cubic yards. is below the supported result for earthwork quantity conversion; it likely omits allowance, conversion, coverage, or final round-up.
Memory Technique
Estimating Import takeoff: count the condition before counting the package.
Reference Hint
Study anchor (closed-book): memorize Earthwork quantity conversion from 2025 California Building Code, California Code of Regulations Title 24 / Title 24 California Building Code grading and compacted fill; know the rule or calculation trigger without relying on exam-room lookup.
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