RCDD-002 · Question #15
In specifying labels and pruned tags that meet Underwriters Laboratories (UL) 969 Standard, marking and labeling systems are provided following the listed metrics. Which two of the following are…
The correct answer is A. Adhesion test E. Visual inspection. UL 969 (Standard for Marking and Labeling Systems) mandates an Adhesion test (A) to verify that labels bond securely to surfaces under real-world conditions, and a Visual inspection (E) to confirm legibility, clarity, and overall marking integrity - both are explicitly required…
Question
In specifying labels and pruned tags that meet Underwriters Laboratories (UL) 969 Standard, marking and labeling systems are provided following the listed metrics. Which two of the following are REQUIRED for the UL standard? (Select two options.)
Options
- AAdhesion test
- BThickness test
- CTexture test
- DDurability test
- EVisual inspection
How the community answered
(57 responses)- A72% (41)
- B16% (9)
- C4% (2)
- D9% (5)
Explanation
UL 969 (Standard for Marking and Labeling Systems) mandates an Adhesion test (A) to verify that labels bond securely to surfaces under real-world conditions, and a Visual inspection (E) to confirm legibility, clarity, and overall marking integrity - both are explicitly required evaluation criteria in the standard. Thickness (B) is not a standalone required metric under UL 969 for label qualification. Texture (C) is not a defined test category in the standard. Durability (D) is a broad concept that UL 969 addresses indirectly through specific sub-tests (like adhesion), but "durability test" is not itself a discrete required test named in the standard.
Memory tip: Think "A.E.I.O.U - but only A and E matter" - Adhesion keeps it stuck, Eyes (visual inspection) confirm you can read it. Labels must stick and be seen to pass UL 969.
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