A rough grade pad must fall 1.5 percent across 84 feet. What fall is required?
Correct Answer
A) 1.26 feet.
One and one-half percent of 84 feet is 1.26 feet of fall.
Why This Is the Correct Answer
One and one-half percent of 84 feet is 1.26 feet of fall.
Why the Other Options Are Wrong
Option B: 0.84 feet total.
0.84 feet total. is below the supported result for earthwork grading calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 1.50 feet total.
1.50 feet total. is above the supported result for earthwork grading calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 2.10 feet total.
2.10 feet total. is above the supported result for earthwork grading calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to one-half, adjust for percent, then let Checking Site set the finish line.
Reference Hint
Study anchor (closed-book): memorize Earthwork grading calculation from California Building Code, California Code of Regulations Title 24. / Title 24 California Building Code site grading and drainage concepts; know the rule or calculation trigger without relying on exam-room lookup.
More Class B Trade Questions
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