A pad needs 950 compacted cubic yards of structural fill. If the borrow material yields 0.85 compacted cubic yard for each bank cubic yard, what bank volume is required?
Correct Answer
D) 1,118 bcy
Required bank volume is 950/0.85 = 1,117.6 bcy, rounded to 1,118 bcy. Other choices multiply instead of divide, use a 0.90 yield, or add an arbitrary swell factor.
Why This Is the Correct Answer
Required bank volume is 950/0.85 = 1,117.6 bcy, rounded to 1,118 bcy. Other choices multiply instead of divide, use a 0.90 yield, or add an arbitrary swell factor.
Why the Other Options Are Wrong
Option A: 808 bcy
compacted fill yield, choice a: 808 bcy uses the wrong numerator, denominator, or percent conversion.
Option B: 1,073 bcy
compacted fill yield, choice b: 1,073 bcy is wrong because 1,073 bcy uses the wrong numerator, denominator, or percent conversion.
Option C: 1,235 bcy
compacted fill yield, choice d: 1,235 bcy uses the wrong numerator, denominator, or percent conversion.
Memory Technique
Store compacted fill yield with its last math move; nearby answers are usually unfinished versions of 1,118 bcy.
Reference Hint
Open Pipe and Excavation Contracting, 2011; use the index entry or section for "Earthwork shrink and yield calculation" to confirm that Required bank volume is 950/0.85 = 1,117.6 bcy, rounded to 1,118 bcy.
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