On a grading plan, if the existing grade is 98.5' and the proposed grade is 101.2', how much fill is required at this location?
Correct Answer
C) 2.7 feet of fill
Fill is required when the proposed grade is higher than existing grade. 101.2' - 98.5' = 2.7 feet of fill needed at this location.
Why This Is the Correct Answer
When the proposed grade (101.2') is higher than the existing grade (98.5'), material must be added to raise the ground level, which is called fill. The calculation is straightforward: proposed grade minus existing grade equals the amount of fill needed. Since 101.2' - 98.5' = 2.7', this location requires 2.7 feet of fill material to achieve the desired grade.
Why the Other Options Are Wrong
Option A: 2.7 feet of cut
This option incorrectly identifies the operation as 'cut' when the proposed grade is higher than existing grade, which requires fill, not cut.
Option B: 1.7 feet of fill
This option incorrectly identifies the operation as 'cut' when fill is needed, and also uses the wrong calculation result of 1.7 feet instead of 2.7 feet.
Memory Technique
Use 'FILL UP' - when proposed grade goes UP from existing grade, you need to FILL. For the math: 'Proposed minus Past (existing) = Project requirement.'
Reference Hint
Look up site work and grading specifications in Division 31 of construction specifications, or earthwork sections in construction reference materials.
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