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Advanced Rigging Exam 2024 Q’s and A’s
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Advanced Rigging Exam 2024 Q’s and A’s
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Advanced Rigging Exam 2024 Q’s andA’s
Backward stability - -In crane operations, the measure of a crane steadiness
in relation to the tipping axis on the opposite side of the crane from the
boom.
-Chicago boom - -A load-hoisting device con-sisting of a single boom
attached at its base to either a vertical post or beam in a larger struc-ture,
such as a building skeleton, or a freestand-ing pole stabilized by guy wires.
Such booms are easily erected and suitable for repetitive hoisting operations
at a fixed location.
-Center of gravity (CG) - -The point where one can assume all of an object's
mass, and therefore its weight, is concentrated. The con-cept is useful for
determining stability, a load's balance point, and leverage.
-coefficient of friction (CF) - -A ratio that expresses a comparison between
the force nec-essary to move an object over the surface of an-other material,
and the pressure between the two materials.
-Combined CG - -The sum of the crane's and load's CGs at a position along
an imaginary line connecting the two CGs
-Cribbing - -A stack of heavy squared timbers laid in a crisscross pattern to
temporarily sup-port loads during movement and placement.
-Dynamics: - -The response of objects to the ap-plication of forces,
moments, or torques.
-Forward stability - -In crane operations, the measure of the crane's
steadiness in relation to the tipping axis on the same side as the boom.
-Impact loading - -Sudden forces acting on an object due to collisions or
other dynamic events
-Inclined planes - -Flat surfaces placed at a shallow angle that connect
levels at different heights. A ramp is an example of an inclined plane.
-Momentum - -A property of a moving object that is directly proportional to
both its mass and speed.
-Non-centered lift - -Any lift attempted when the hoist line is not vertical or
the hook is not directly above the load's center of gravity.
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