CFP Blueprint Reading & Interpretation 3 — Questions and Answers
Question 1: A fence detail calls for posts set at 'EQ SP' between two corner posts 48 feet apart with 5 line posts. What is the actual spacing?
- 8 feet (Correct answer)
- 9.6 feet
- 10 feet
- 12 feet
Correct answer: 8 feet
Five line posts create six equal spans over 48 feet: 48 ÷ 6 = 8 feet per span.
Question 2: Which symbol on a site plan most commonly indicates an existing tree to be protected during fence installation?
- A solid filled square
- A circle with a trunk dot and radiating lines (Correct answer)
- A triangle pointing north
- A dashed rectangle
Correct answer: A circle with a trunk dot and radiating lines
Trees are conventionally shown on site plans as a circle representing the drip line with a small dot at the center for the trunk and radiating lines.
Question 3: A fence section detail shows 'FG' and 'FF' elevations. What do these abbreviations mean?
- Front Gate and Far Fence
- Finished Grade and Finished Floor (Correct answer)
- Fixed Ground and Fixed Foundation
- Front Grade and Flat Foundation
Correct answer: Finished Grade and Finished Floor
'FG' means Finished Grade (final outdoor ground level) and 'FF' means Finished Floor, both used as elevation reference points.
Question 4: On a fence plan, a bold solid line weight is used for fence panels while a thin line is used for property lines. Why does line weight matter?
- Line weight indicates the material cost of each element
- Line weight differentiates the hierarchy and importance of drawing elements (Correct answer)
- Thicker lines are always drawn first during drafting
- Line weight shows which elements were added in the last revision
Correct answer: Line weight differentiates the hierarchy and importance of drawing elements
Line weight hierarchy helps readers instantly distinguish between primary construction elements, reference lines, and secondary information.
Question 5: A gate detail references 'Sheet A-3, Detail 4.' How do you locate that detail?
- Open the specifications manual to Appendix A, section 3, item 4
- Turn to drawing sheet A-3 and find the circled or boxed detail labeled 4 (Correct answer)
- Search the title block for footnote 3 on revision 4
- Check the project schedule for phase A, week 3, day 4
Correct answer: Turn to drawing sheet A-3 and find the circled or boxed detail labeled 4
Drawing cross-references use a sheet number followed by a detail number; navigate to sheet A-3 and locate Detail 4 within that sheet.
Question 6: What does a 'revision cloud' drawn on a fence blueprint indicate?
- An area of the site with poor drainage
- A section of the drawing that was changed after the original issue (Correct answer)
- The location where aerial photographs were taken
- A zone where underground utilities are present
Correct answer: A section of the drawing that was changed after the original issue
Revision clouds are arced scalloped lines drawn around areas of a drawing that have been modified, helping readers quickly identify what changed between drawing revisions.
Question 7: A fence specification calls for posts embedded to a depth equal to one-third of the total post length. For a 9-foot post, what is the required embedment depth?
- 2 feet
- 3 feet (Correct answer)
- 4 feet
- 2.5 feet
Correct answer: 3 feet
One-third of a 9-foot post equals 3 feet of required embedment depth, leaving 6 feet of post above grade.
CFP Blueprint Reading & Interpretation 3
A fence detail calls for posts set at 'EQ SP' between two corner posts 48 feet apart with 5 line posts.
What is the actual spacing?