Mobile Crane NCCER Study Guide Questions and Answers Fully Solved 100%

When making a multiple crane lift it is important for the operator to understand that - Answer-the weight may increase if the other crane lands the load first If the crane's jib is offset 5 degrees as opposed to an original 15 degrees and the boom angle remains constant you would expect the load radius to do what? - Answer-To be reduced When operating truck cranes what is the most unstable allowable quadrant of operation? - Answer-Side When working near power lines when is a signal person required? - Answer-When crane moves within a booms length of power lines How many broke wires in one strand in one lay of a wire rope slings will make it necessary to replace the sling? - Answer-5 By order of strength which is correct - Answer-Basket, Vertical, Choker Primary purpose for a roster sheave or auxiliary boom point sheave is to: - AnswerSeparate the hoist line When the number of layers of rope on a drum increase the : - Answer-Allowable line pull decreases What is the minimum allowable distance from the crane and power lines under 50kV? - Answer-10' When determining the "gross load" the best method is: - Answer-Get an accurate load weight and add the rigging Eccentric main boom tip reeving casues - Answer-twisting of the boom How many randomly broken wires must there be to remove a running wire rope from service? - Answer-6 Tipping capacities of locomotive cranes are based on what % of tipping? - Answer-85% Should the load be applied when determining the proper boom angle? - Answer-YESWhat type of rope is recommended for a tagline around powerlines - AnswerPolypropylene what does two beeps of the horn indicate to people in the area - Answer-forward Load radius is the distance from the center of gravity of the suspended load to the: - Answer-Center of rotation What is the purpose of using a boom extension? - Answer-Increase height