A site swale must drop 2 percent over 65 feet. What fall is required?
Correct Answer
A) 1.3 feet.
Two percent of 65 feet is 1.3 feet of fall.
Why This Is the Correct Answer
Two percent of 65 feet is 1.3 feet of fall.
Why the Other Options Are Wrong
Option B: 1.0 feet total.
1.0 feet total. is below the supported result for earthwork grading calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 1.5 feet total.
1.5 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: 2.0 feet total.
2.0 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
Checking Rough takeoff: count the condition before counting the package.
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 drainage and grading concepts; know the rule or calculation trigger without relying on exam-room lookup.
More Class B Trade Questions
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