CHST - Construction Health and Safety Technician Crane and Rigging Safety Questions and Answers Flashcards
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Read the first 7 CHST - Construction Health and Safety Technician Crane and Rigging Safety Questions and Answers flashcards as text
What is the maximum allowable side pull angle for a standard single-part wire rope sling lift?
Answer: 5 degrees
ASME B30.9 recommends keeping side pull to a minimum; crane manufacturers typically prohibit side loading beyond 5 degrees because it induces lateral boom stress.
A synthetic web sling must be removed from service if it shows which of the following defects?
Answer: Missing or illegible load tag
ASME B30.9 requires removal from service of any sling with a missing or illegible identification tag because rated capacity cannot be verified.
Which rigging configuration provides the highest vertical load capacity for a given sling rated capacity?
Answer: Basket hitch with both legs vertical
A basket hitch with both legs vertical doubles the effective load capacity compared to a single vertical hitch, and is more efficient than angled bridles.
What action must be taken before working on or near a crane's electrical systems?
Answer: Apply lockout/tagout procedures
OSHA's lockout/tagout standard (29 CFR 1910.147) requires energy isolation and lockout before any maintenance on electrically powered crane systems.
How should a tag line be used during a crane lift?
Answer: To control load rotation and swing without workers pulling against the crane
Tag lines guide load orientation and prevent uncontrolled spinning or swinging; workers must never use them to bear load weight or fight the crane.
Which condition requires crane operations to be suspended immediately?
Answer: Any lightning in the area or wind speed exceeding manufacturer's rated limit
Lightning poses an immediate electrocution risk and wind beyond the manufacturer's rated limit makes the crane structurally unsafe — both require immediate shutdown.
Under OSHA 29 CFR 1926.1427, crane operators must be qualified by which method?
Answer: Certification by an accredited crane operator testing organization, employer qualification, or military training
OSHA 1926.1427 allows operator qualification through third-party certification (e.g., NCCCO), employer-based qualification program, or equivalent military training.