The earthwork section requires unit prices for unsuitable-soil removal. What is the contract-administration use of those unit prices?
Correct Answer
C) They adjust payment when the measured quantity differs from the bid quantity under the contract
Unit prices establish agreed pricing for measured quantity changes in defined work. Other choices overstate unit prices, make them internal only, or eliminate the measurement that makes unit pricing work.
Why This Is the Correct Answer
Unit prices establish agreed pricing for measured quantity changes in defined work. Other choices overstate unit prices, make them internal only, or eliminate the measurement that makes unit pricing work.
Why the Other Options Are Wrong
Option A: Use unit prices to replace all lump-sum work as though it satisfied the specific unit prices requirement
Choice A gives They replace all lump-sum work. Its specific error: it removes the controlling Unit prices requirement instead of meeting it.
Option B: Use unit prices only to ank subcontractors internally
Choice B (They are used only to rank subcontractors internally) is rejected because it tries to bypass the Unit prices checkpoint.
Option D: Use unit prices to waive the need for field measurement
The trap in D is They waive the need for field measurement. That selection is wrong because it removes the controlling Unit prices requirement instead of meeting it.
Memory Technique
Treat unit prices like a labeled shelf; only the matching condition belongs with They adjust payment when the measured quantity differs from the bid quantity under the contract.
Reference Hint
Open Construction Project Management, 5th Ed. (2022); use the index entry or section for "Unit-price work and quantity adjustments" to confirm that Unit prices establish agreed pricing for measured quantity changes in defined work.
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