Crane and Rigging Safety Flashcards
7 cards from real CHST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Crane and Rigging Safety flashcards as text
What is the purpose of a tag line during a crane lift?
Answer: To control load swing and rotation without personnel being in the load path
Tag lines allow ground workers to guide and stabilize a suspended load while keeping them out of the hazardous zone directly under or near the load.
Which rigging configuration reduces a sling's rated capacity the most?
Answer: Basket hitch at 30-degree included angle
As the sling angle decreases from vertical, horizontal tension increases; a very narrow basket hitch (30° included angle) produces the greatest reduction in effective capacity.
Under OSHA 29 CFR 1926.1427, who is required to be a Qualified Rigger?
Answer: Personnel who attach or detach rigging to a load
OSHA 1926.1427 requires that only qualified riggers attach or detach rigging from a load, ensuring personnel have the knowledge and experience to rig safely.
What does a crane's 'derating' mean in the context of crane operations?
Answer: Reducing the rated capacity due to configuration, attachment, or site conditions
Derating means the crane's capacity is officially reduced below the manufacturer's chart value to account for conditions such as soft ground, outrigger restrictions, or non-standard configuration.
A crane operator receives conflicting hand signals from two workers during a lift. What should the operator do?
Answer: Stop the crane and do not move until one designated signal person is identified
OSHA requires only one designated signal person per lift; receiving conflicting signals is a stop-work condition until a single signal person is confirmed.
When rigging a load with a multiple-leg bridle, the weight distribution is calculated assuming how many legs bear the load?
Answer: Two legs, because load distribution is uneven in three- and four-leg slings
Standard rigging practice assumes only two legs of a multi-leg bridle are loaded at any time because slight differences in leg length or load geometry prevent equal sharing among three or four legs.
What is the maximum allowable body wear (reduction in original rope diameter) that causes a wire rope to be removed from service under ASME B30.2?
Answer: One-third (33%) reduction
ASME B30.2 specifies that wire rope must be removed from service when the actual diameter is reduced by one-third or more from its nominal diameter due to wear.