10–20. At a swaged connection, what is the  maximum  amount  of  broken  wires allowed  before  the  swaged  fitting should  be  replaced? 1. One 2. Two 3. Three 4. Four 10-21. When a hook has been bent by overloading,    the hook should be  straightened  by  heating  the hook with a torch. 1. True 2. False 10-22. When an original shackle pin is lost or does not fit properly, the shackle should NOT be used. 1. True 2. False Learning  Objective: Recognize the  principles  and  components of fiber line and chains. 10–23. Which of the following types of fiber line comes from the leaf stems of the stalk of the abaca plant? 1. Sisal 2. Manila 3. Cotton 4. Hemp 10-24. Which of the following types of fiber  line  is  principally  used in fittings, such as ratline, marline, and spun yarn? 1. Sisal 2. Manila 3. Cotton 4. Hemp 10–25. The snapback of a nylon rope can be as deadly as a bullet. 10-26. What  percentage  of  extension  in length is the critical point of loading for a nylon rope? 1. 10% 2. 20% 3. 30% 4. 40% 10-27. What type of fiber line has characteristics  similar  to  that  of nylon  line,  but  does  not  snapback when it parts? 1. Sisal 2. Hemp 3. Kevlar 4. Manila 10-28. For some jobs, which of the following  properties  make  chain more suited for use than wire rope? 1. Resistant  to  abrasion 2. Resistant  to  corrosion 3. Resistant  to  heat 4. All of the above 10-29. Which  of  the  following  conditions affects the strength of a chain? 1. Knotting  the  chain 2. Overloading  the  chain 3. Heating the chain to temperatures  above  500°F 4. All of the above 10-30. Chains  should  be  removed  from service when any link shows wear that  exceeds  what  percentage  of the  thickness  of  the  metal? 1. 10% 2. 15% 3. 20% 4. 25% 1. True 2. False 73