For the subcontractor quantity check at the urgent-care ambulance canopy, the concrete washout solids produces 42 CY of solid waste volume, with 15% swell or handling allowance. Each container holds 10 CY. How many containers are required?
Correct Answer
C) 5 containers
Container count equals adjusted debris volume divided by container capacity, rounded up.
Why This Is the Correct Answer
Container count equals adjusted debris volume divided by container capacity, rounded up.
Why the Other Options Are Wrong
Option A: 4 containers
4 containers is below the supported result for concrete washout solids; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 6 containers
6 containers is above the supported result for concrete washout solids; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 7 containers
7 containers is above the supported result for concrete washout solids; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Superintendent Checks takeoff: count the condition before counting the package Tie the cue to Concrete Washout Solids Superintendent.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Concrete operations; washout container planning; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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