Technician exam question T0B05
Subelement T0, SAFETY· Group T0B
What is the purpose of a safety wire through a turnbuckle used to tension guy lines?
- A.Secure the guy line if the turnbuckle breaks
- B.Prevent loosening of the turnbuckle from vibration (correct answer)
- C.Provide a ground path for lightning strikes
- D.Provide an ability to measure for proper tensioning
WhyA safety wire through a turnbuckle used to tension guy lines prevents the turnbuckle from loosening due to vibration. A safety wire threaded through a turnbuckle's barrel keeps the mechanism from slowly unwinding under the constant vibration a guyed tower experiences, which would otherwise loosen the guy line's tension over time, answer B. It doesn't provide backup support if the turnbuckle itself broke (A), it isn't a lightning ground path (C), and it isn't a tensioning gauge (D), it's purely a lock against unwanted rotation.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
Related questions
- T0B01Which of the following is good practice when installing ground wires on a tower for lightning protection?
- T0B02What is required when climbing an antenna tower?
- T0B03Under what circumstances is it safe to climb a tower without a helper or observer?
- T0B04Which of the following is an important safety precaution to observe when putting up an antenna tower?
- T0B06What is the minimum safe distance from a power line to allow when installing an antenna?