Which term describes the action of centering the bridge and trolley over the load before hoisting?

Which term describes the action of centering the bridge and trolley over the load before hoisting?

• A. Centering
• B. Aligning
• C. Hooking
• D. Idling

Answer: (A)

Centering means precisely positioning the crane’s bridge and trolley so the hoist hook sits directly over the load’s center. This ensures the lifting line is vertical, the load is balanced, and there’s minimal sideways force on the rigging as you lift. Centering reduces load swing, prevents tipping or side-loading on ropes and drums, and helps protect both the load and the crane components. To do it, move the bridge and trolley until the hook is over the load’s center of gravity with enough clearance, then lift slowly to verify a clean, vertical lift. The other terms don’t fit because hooking is just attaching the load, idling means not moving, and aligning is a broader term that doesn’t specify getting the hook over the load before lifting.

Centering means precisely positioning the crane’s bridge and trolley so the hoist hook sits directly over the load’s center. This ensures the lifting line is vertical, the load is balanced, and there’s minimal sideways force on the rigging as you lift. Centering reduces load swing, prevents tipping or side-loading on ropes and drums, and helps protect both the load and the crane components. To do it, move the bridge and trolley until the hook is over the load’s center of gravity with enough clearance, then lift slowly to verify a clean, vertical lift. The other terms don’t fit because hooking is just attaching the load, idling means not moving, and aligning is a broader term that doesn’t specify getting the hook over the load before lifting.