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A series of questions and answers related to rigging practices, focusing on the safe working loads of rigging equipment, inspection criteria, and proper usage techniques. It covers topics such as hooks, shackles, slings, jacks, and hand signals used in crane operations. The material is designed to test and reinforce knowledge of rigging safety and operational procedures, making it a valuable resource for millwrights and other professionals involved in lifting operations. It also includes information on chain slings, metal mesh slings, and various types of jacks, along with guidelines for their safe use and inspection. (415 characters)
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saddle - answer the safe working load of a rigging hook is accurate only when the load is suspended from the ______________ of the hook 15 - answer SHA requires that a hook be replaced if the throat has opened _____ percent or more from it's original size. 40 - answer A hook that is point loaded could theoretically carry about ________ percent of the rated load. Shackles - answer Slings are attached together using ___________. 1 1/2 - answer tapped holes used with screwed-in eye bolts should have a minimum depth of ______________ times the bolt diameter. equalizer plate - answer to level loads when the legs of a sling are unequal,_____________ can be used. 125 - answer Custom-fabricated spreader and equalizer beams should be tested at ____________ percent of their rated capacity. spreader beams - answer long loads are supported during lift operations with _________________. metal mesh - answer slings best suited for situations where the load is abrasive, hot,or tends to cut is a (n)_____________ sling. diameter of the surface the sling is wrapped around - answer The term D/d ratio refers to the relationship between the sling and the Dredging and other marine work requires _________ slings because they withstand corrosion better - answer chain a chain sling should be discarded if any portion of the chain is worn by ____________ percent or more. - answer tag lines should be attached to a load where it will give the - answer greatest mechanical advantage
1/2 to 6 - answer the capacity range of come-along is ____________ tons the ratchet jack can lift heavier loads than the screw jack or hydraulic jack. - answer false hydraulic - answer the most useful general-purpose jack is the ______________ jack. What action is signaled by tapping your fist on your head, then using regular hand signals? - answer Use main hoist. Dog everything, the operator then - answer make no machine movement if its apparent that the crane operator has misunderstood a hand signal, the signal person should - answer signal the operator to stop a one-handed signal that is given with the fist in front of the body and the thumb pointing toward the signaler's body means ______________. - answer extend the boom to keep the load under control a _________ is used. - answer tag line lifting a bundle of loose items, or maintain the load in a certain position. - answer double-wrap choker hitch may be useful chain hoist - answer should be used for straight, vertical lifts only load chain of a chain hoist - answer should never be wrapped around an object or used as a choker tag lines - answer natural fiber or synthetic ropes used to control the swinging of the load in hoisting activities Wear - answer any portion of the chain worn by 15 percent or more should be removed from service immediately discard metal mesh slings - answer reduction of wire diameter of 25 percent due to abrasion or 15 percent due to corrosion after being annealed 6 times - answer the chain should be removed from service remove beam clamps from service - answer if jaws have been opened more than 15 percent of their normal opening turnbuckles - answer the safe working load of ___________with hook ends is less than that of the same size ____________ with other types of ends.
should less type eyebolts - answer designed only for lifting a load vertically when using a shackle on a hook, the _________ of the shackle should be hung on the hook. - answer pin