For the material-order review at the public-works salt shed, the drywall screws scope includes 70 gypsum-board sheets, with 42 fasteners per item. Boxes contain 1000 fasteners. How many boxes are needed?
Correct Answer
C) 3 boxes
Fastener boxes equal item count times fasteners per item divided by fasteners per box, rounded up.
Why This Is the Correct Answer
Fastener boxes equal item count times fasteners per item divided by fasteners per box, rounded up.
Why the Other Options Are Wrong
Option A: 1 box
1 box is below the supported result for drywall screws; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 2 boxes
2 boxes is below the supported result for drywall screws; it likely omits allowance, conversion, coverage, or final round-up.
Option D: 8 boxes
8 boxes is above the supported result for drywall screws; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to fastener, adjust for controlling, then let Field Engineer set the finish line.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Drywall fastening; screw box estimating; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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