Intermediate Rigging (BOOM VOC) questions n answers 2024/2025

Intermediate Rigging (BOOM VOC)What factor would you apply in determining the minimum capacity requirement for cranes, slings etc for use in a dual crane lift? - correct answer 20% reduction for each crane When using more than one crane for a lift, how many crane motions would you direct at any one time? - correct answer One When rotating a load using two cranes, how much weight must the primary crane be capable of carrying? - correct answer 100% of the load Is a person with a basic rigger certificate allowed to supervise dual crane lifts? - correct answer No Calculate the required minimum crane capacity for each crane where two cranes are used to lift a 35 tonne beam and the sling pints are located at equal distance from each end? - correct answer 35t divided by 2 = 17.5 x 20% = 21t Each crane must have a capacity of 21t at the required radius When rotating a load using the main and auxiliary hooks on a single crane, how ` much weight must the whip line or auxiliary hook be capable of carrying? - correct answer 20% less than its rated capacity What is the minimum amount of clearance required between the top layer of rope and the rim of the flange of a winch drum? - correct answer A minimum of two full turns on the winch drum How would you determine the fleet angle for an un-grooved winch drum? - correct answer With of drum 1 meter x 19 (factor) x 0.5 (half the with of the drum) = 9.5, So the sheave must be a minimum of 9.5 m from the drum What is the maximum fleet angle allowed for a grooved drum? - correct answer 5 degrees or 1 in12 factor