Rigging practices course Questions and Answers 2023 with complete solution

1. A load chart range diagram can best be used to help identify:: net capacity 2. for mobile crane working at maximum radius, exceeding what percentage of the cranes capacity requires the radius to be verified?: 80% 3. the minimum depth of thread engagement for a 1/2 in eyebolt into steel object is?: 3/4 in 4. when tying knots in synthetic rope lashing, the rated load is increased by 50% ?: false 5. the size of shackle that can be used in the eye of a wire rope sling must be the wire rope size?: equal to or greater than 6. a shackle must be marked with the rated load, re-inspected due date, and the date manufacture?: false 7. when working near energized power lines where the crane or load could cross the absolute limit of approach, what additional requirements must the crane team follow?: designated spotter must be stationed to watch clearances 8. the load weight of a personnel lift must not exceed of the hoists rated capacity for the working radius ?: (50%) 9. a manufacturer's certificate of proof test may satisfy the initial test require- ments for rigging equipment?: false 10. which of the following operator actions will most likely cause a reduction in the capacity of a mobile crane?: booming down 11. an angular pull of 45 degrees is allowed on non shouldered type eye bolts?: false 12. two slings creating a 60 degree sling angle are used to lift a 4,000 pound item. the appropriate rated load for each sling is 2,000 pounds.: false 13. when are loads allowed to be moved over personnel?: never 14. given a 1/2 in steel walled empty cylindrical tank that is opened at one end, calculate its weight (round answer to the nearest hundred): 1800 lbs 15. a crane accident occurs when any one of the elements in the crane operating envelope fails to perform correctly during crane operations, main- tenance, or testing, which results in any of the following except:: over rigging the load 16. a straight-line hitch is good for of a sling rated load?: 100%