Pick and Carry Operations 1 Flashcards
6 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 6 Pick and Carry Operations 1 flashcards as text
During a pick and carry operation, how must the outriggers be positioned before the crane begins to travel?
Answer: Fully retracted into their travel position
Outriggers must be fully retracted before the crane travels. Pick and carry operations use the crane's travel ratings, which assume outriggers are stowed; partially extended outriggers create an undefined and dangerous support condition.
How does a crane's rated load capacity for pick and carry (traveling with a load) compare to its rated capacity for a stationary lift?
Answer: It is reduced, because dynamic forces during travel increase stress on the structure
Travel (pick and carry) ratings are lower than stationary ratings because movement introduces dynamic forces — acceleration, braking, and surface irregularities — that add stress beyond what the static load creates.
At what height should the load be carried during a pick and carry operation?
Answer: As low as practical while still clearing the ground and path obstructions
Carrying the load as low as practical lowers the crane's combined center of gravity, reducing the risk of tipping. Unnecessarily high loads increase the tipping moment, especially on uneven terrain.
What should be used to control load swing and prevent the load from rotating during a pick and carry move?
Answer: Tag lines, managed by ground personnel walking alongside
Tag lines allow ground personnel to dampen and guide the load, preventing uncontrolled rotation or swing caused by starting, stopping, or surface irregularities. No mechanical crane control can safely substitute for tag lines in managing a moving suspended load.
Before beginning a pick and carry move, what must the operator do regarding the intended travel path?
Answer: Survey the entire path for surface conditions, grades, obstacles, and overhead hazards
A pre-travel path survey identifies soft spots, grades, cross-slopes, underground utilities, overhead lines, and obstacles. Discovering a hazard mid-move with a suspended load is far more dangerous than planning a safe route in advance.
During a pick and carry operation on a rubber-tired crane, why is it generally NOT recommended to engage the swing lock while traveling?
Answer: It can transmit sudden lateral forces directly to the crane structure if the crane tilts or shifts on uneven ground
With the swing lock engaged, any lateral tilt from uneven terrain forces the boom and load to remain fixed relative to the crane, generating large side loads on the structure and increasing tip-over risk. Allowing some free swing lets the load hang more nearly vertical and reduces these forces.