Lift Planning and Critical Lift Procedures Flashcards
7 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Lift Planning and Critical Lift Procedures flashcards as text
According to ASME B30.5, a lift over a public roadway typically requires:
Answer: Permits, coordination with authorities, and often a written lift plan
Lifts over public roadways require appropriate permits, coordination with local authorities, and typically a documented lift plan for traffic management and safety.
When must a lift plan be revised during an ongoing operation?
Answer: When conditions change significantly, such as a weather change or unexpected ground conditions
Lift plans must be updated whenever site conditions change significantly enough to affect the safety assumptions on which the original plan was based.
The function of outrigger float pads (cribbing) during lift planning is to:
Answer: Distribute the outrigger load over a larger area to reduce ground bearing pressure
Cribbing or outrigger pads spread the concentrated outrigger load over a greater surface area, reducing pressure on the ground and preventing sinking.
Which factor is NOT typically required in a critical lift plan?
Answer: The crane operator's personal fitness level
While operator qualifications and certifications matter, personal fitness level is not a standard element documented in a critical lift plan.
When a crane is operating on a slope, how does the incline affect the lift plan?
Answer: The effective radius increases on the downhill side, reducing the rated capacity for lifts in that direction
A crane on a slope experiences an increased effective radius on the downhill side, which reduces the rated capacity for lifts made toward the low side.
What is the significance of 'structural competency' when selecting a crane for a critical lift?
Answer: It ensures the crane's boom, structure, and components can withstand the imposed loads without failure
Structural competency confirms that the crane's entire structure — boom, turntable, carrier — is capable of safely handling the planned load without risk of failure.
If the load chart shows a capacity of 40 tons at a 30-foot radius, and the planned load plus rigging equals 38 tons, what percentage of rated capacity is being used?
Answer: 95%
38 tons divided by 40 tons equals 0.95, or 95% of rated capacity, which would classify this as a critical lift requiring enhanced planning.