Using the scale bar, approximately what centerline length is shown from MH-1 to CB-4?
Correct Answer
C) 60 ft
The unlabelled centerline is approximately three times the 20 ft scale bar.
Why This Is the Correct Answer
The unlabelled centerline is approximately three times the 20 ft scale bar.
Why the Other Options Are Wrong
Option A: 20 ft
Choice A uses only one scale-bar length and stops far short of CB-4.
Option B: 40 ft
Choice B measures about two scale-bar lengths rather than the full line to CB-4.
Option D: 80 ft
Choice D rounds the line to four scale-bar lengths, which overstates the drawn centerline.
Memory Technique
For scaled storm line, if no dimension is printed, measure against the scale bar before calculating.
Reference Hint
Open Sheet C-114; identify whether the figure asks for a segment, sum, scale-bar estimate, or area calculation.
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