Stop point
Direct answer
Stop when the load is not freely suspended or the hoist line is not vertical. Use the current equipment manual, code book, employer procedure, and qualified supervision before applying this on live work.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as Boom loading and drill a smaller set before returning to mixed practice.
Prep path
Guide
NCCCO Study Guide
Independent NCCCO study guide for mobile crane core concepts, load charts, rigging, site setup, and safety practice.
SamplesNCCCO Sample Questions
Public NCCCO Practice Test sample questions with explanations.
PracticeOpen NCCCO Practice Test
Start with the 10-question free set before deciding whether to unlock the full question bank.