Rigging Final Questions And Answers

According to OSHA, what conditions require synthetic fiber rope to be removed from service? - Answer- It must be removed from service if there are signs of abnormal wear, powdered fibers between the strands, broken or cut fibers, variation in size or roundness of strands. One major manufacturer lists their 1/2" three strand rope as having a catalog breaking strength of 5600 lbs. Using the industry standard design factor, determine the working load limit. - Answer- 5600/5 = 1120lbs working load limit Which knot is often called the king of knots? - Answer- The Bowline. It is easily untied after supporting a heavy load. What are OSHA's requirements for inspecting wire rope? - Answer- They There are two variations of the square knot that should be avoided for rigging purposes. What are they? - Answer- The thief knot, because the tension is crossways it does not perform as well as the square knot. The grief or "whatknot" is a trick knot and often falls apart when tension is applied. What is the efficiency rating of a bowline on a bight? - Answer- It is 65% efficient. What is the efficiency rating of a running bowline? - Answer- It is 50% efficient. What is the efficiency rating of a clove hitch? - Answer- It is 60% efficient Explain what it helps to begin a splice with a tracer strand. - Answer- Start by tucking the tracer strand back into itself, this gives you a good reference point to start the splice. How far must the tails project beyond the last full tuck in 3/4" rope? - Answer- The tails must project at least six rope diameters for all rope 1" and under. Which of the following splices is not rated for efficiency? a. eye splice b. short splice c. back splice - Answer- c. Back splices prevent the ends of a rope from fraying and therefore has no efficiency rating According to the text, which of the rigging configurations is used for setting poles? - Answer- Choker The name tag of a sling reads "EE2-802". What does it mean? - Answer- EE refers to eye and e