CFP Quality Control & Inspection 2 — Questions and Answers
Question 1: During a post-installation inspection, you discover that several fence posts are out of plumb by more than 2 degrees. What is the most appropriate corrective action?
- Backfill with additional concrete and leave as-is
- Reset the posts to meet plumb tolerance before final acceptance (Correct answer)
- Apply tension wire to pull posts into alignment
- Document the deviation and obtain owner sign-off
Correct answer: Reset the posts to meet plumb tolerance before final acceptance
Posts out of plumb beyond acceptable tolerances must be reset before final acceptance to ensure structural integrity and contract compliance.
Question 2: Which ASTM standard governs the specification for chain-link fence fabric used in commercial installations?
- ASTM A392 (Correct answer)
- ASTM F567
- ASTM A123
- ASTM F1043
Correct answer: ASTM A392
ASTM A392 is the standard specification for zinc-coated (galvanized) steel chain-link fence fabric.
Question 3: A QC inspector measures line post spacing on a chain-link fence and finds intervals of 10 feet, 10.5 feet, and 9.8 feet. The spec allows ±6 inches. What is the correct assessment?
- All intervals are non-compliant and must be corrected
- Only the 10.5-foot interval fails and must be corrected
- All intervals are within acceptable tolerance (Correct answer)
- The 9.8-foot interval alone is out of tolerance
Correct answer: All intervals are within acceptable tolerance
With a ±6-inch (0.5-foot) tolerance on 10-foot spacing, any measurement between 9.5 and 10.5 feet is acceptable — all three intervals comply.
Question 4: What is the primary purpose of a pull test on fence fabric tension?
- To verify the gauge of the wire used
- To confirm the fabric is tight enough to resist deflection under load (Correct answer)
- To check the coating weight of the zinc finish
- To measure the mesh opening size
Correct answer: To confirm the fabric is tight enough to resist deflection under load
A pull test verifies that tensioned fabric resists deflection and meets the firmness standard required for security and appearance.
Question 5: When inspecting a wood privacy fence, you notice the pickets have a moisture content of 22%. Why is this a quality concern?
- High moisture content causes faster corrosion of fasteners only
- Wet wood above 19% is prone to significant shrinkage, warping, and splitting as it dries (Correct answer)
- Moisture content above 15% violates all residential fence codes
- Wet pickets cannot accept paint or stain under any conditions
Correct answer: Wet wood above 19% is prone to significant shrinkage, warping, and splitting as it dries
Wood installed above 19% moisture content will shrink and distort as it dries in service, leading to gaps, warping, and structural defects.
Question 6: A client complains that a newly installed ornamental aluminum fence rattles in the wind. During inspection, you find picket-to-rail connections are loose. What is the most likely QC failure?
- Incorrect post embed depth
- Insufficient picket spacing
- Fasteners not torqued to specification or missing set screws (Correct answer)
- Wrong grade of aluminum alloy used
Correct answer: Fasteners not torqued to specification or missing set screws
Rattling at picket-to-rail connections indicates fasteners were not properly torqued or set screws were omitted during assembly.
Question 7: Which document should a QC inspector reference to verify that gate hardware meets the load-bearing requirements for a commercial double-swing gate?
- The fence manufacturer's color chart
- The project specifications and hardware manufacturer's load ratings (Correct answer)
- The local zoning ordinance only
- OSHA 29 CFR 1926 Subpart Q
Correct answer: The project specifications and hardware manufacturer's load ratings
Project specifications combined with hardware manufacturer load ratings provide the required performance benchmarks for gate hardware verification.
CFP Quality Control & Inspection 2
During a post-installation inspection, you discover that several fence posts are out of plumb by more than 2 degrees.
What is the most appropriate corrective action?