Level 2 Module 38102 (Rigging Practices) Quiz Questions with Right Rationales Graded A+

  Threaded blind holes used with eyebolts should have a minimum depth of _____. - Answer: 1 1⁄2 times the bolt diameter Custom-fabricated spreader and equalizer beams are tested at _____. - Answer: 125 percent of their rated load To keep them in place while the sling is positioned, manufactured protective materials for slings may be equipped with _____. - Answer: magnets A device used as a connection point for a load that has no reduction in rated load when an angular pull is applied is a _____. - Answer: swivel hoist ring A wire rope sling should be removed from service if localized abrasion and scraping has reduced the diameter more than _____. - Answer: 5 percent of the original rope diameter Which of the following types of damage to a metal-mesh sling is allowed to be more extensive than the other before it is removed from service? - Answer: Abrasion Refer to Figure RQ03. Which of the two drawings, A or B, represent the proper way to orient the shackle? - Answer: Drawing A Which of the following is a correct statement? - Answer: A come-along uses a cable while a ratchet-lever hoist uses a chain. When the eyes of a synthetic web sling are sewn at right angles to the plane of the sling body, it is called a(n) _____. - Answer: twisted eye-and-eye sling Refer to Figure RQ02. Based on the measurements shown, what is the sling angle factor that should be applied to the weight of the lifted load on each sling? - Answer: 1.400 Which of the following slings is best suited for situations where the load is abrasive, hot, and/or tends to cut? - Answer: Metal-mesh sling When the weight of a load cannot be determined in other ways, it can be lifted slightly while monitoring the weight using instruments in the crane. The lift can proceed if the load is less than _____. - Answer: 75 percent of the crane's capacity at the longest required operating radius Which of the following is a disadvantage of chain slings when compared to wire-rope slings? - Answer: Chain slings have less reserve strength and are more likely to fail without warning. Regardless of how a clove hitch is actually tied, the result is the same as _____. - Answer: two half hitches made in opposite directions The type of sling shown in Figure RQ01 is a(n) _____. - Answer: endless Bisect tension - Answer: - The pulling force of a conductor as it tends to pull a pole or structure into line with adjacent poles or structures. Dynamic force load - Answer: A load whose weight varies according to different conditions. Guy tension - Answer: The tension exerted by guy wires to offset the line tension or bisect tension exerted on a pole or structure. Line tension - Answer: - The pulling force, in pounds, of a conductor pulling on a structure such as a dead-end pole. Maximum conductor lift - Answer: The maximum height to which a conductor can be raised without applying undue strain to the tie wires at the adjacent poles; when the lowest point of conductor sag is right at the adjacent poles. Safety factor - Answer: - A numerical expression of the additional capacity of rigging equipment available to handle a load. Static force load - Answer: - A load whose weight remains fixed.