Technician exam question T0B07
Subelement T0, SAFETY· Group T0B
Which of the following is an important safety rule to remember when using a crank-up tower?
- A.This type of tower must never be painted
- B.This type of tower must never be grounded
- C.This type of tower must not be climbed unless it is retracted, or mechanical safety locking devices have been installed (correct answer)
- D.All these choices are correct
WhyAn important safety rule for a crank-up tower is that it must not be climbed unless it's retracted or mechanical safety locking devices have been installed. A crank-up tower's telescoping sections aren't mechanically secured against sliding down unless it's fully retracted or fitted with safety locking devices, so climbing an extended crank-up tower without those locks in place risks a section suddenly collapsing, answer C. Painting (A) and grounding (B) a crank-up tower are both fine and don't carry the same specific structural risk, so D, which depends on those also being genuine hazards, is also wrong.
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.
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