Millwright Rigging & Lifting Correct Questions & Answers(RATED A+)

The breaking strength of rope is a. force needed to pull rope b. force needed to tear rope c. force needed to break the rope d. force needed to stretch rope - ANSWER c. force needed to break the rope Traction grade wire rope has a breaking load of __________ tons per square inch a. 110-190 b. 50-60 c. 45-90 d. 80-90 - ANSWER d. 80-90 Special improved plow grade wire rope has a breaking load of _________ tons per square inch a. 120-130 b. 50-60 c. 45-90 d. 80-90 - ANSWER a. 120-130 A core is built into a wire rope to ? a. hold shape b. conform to manufacturers specs c. supports strands and maintain shape d. stiffen rope - ANSWER c. supports strands and maintain shape Fibre cores are usually made from ________ but can be made from synthetic rope or polypropylene. a. sisal b. silca c. rubber d. sodium - ANSWER b. sisal What type of rope is used when rope is subject to sudden heavy loads, crushing or heat? a. IWTC b. ICDT c. IWRT d. IWRC - ANSWER d. IWRC Independent Wire Rope Cores or WRC wire rope cores Lay refers to the direction in which the rope are twisted together. The term lay length refers to the ___________ along the rope in which a strand makes one revalution a. size b. distance c. direction d. angle - ANSWER b. distance This consists of a number of wires twisted to the left around a small core to form each of six strands. These strands are then twisted to the right around the main core to form the final rope a. Lang lay b. Left lay c. Center lay d. Right lay - ANSWER d. Right lay This consists of wires twisted to the right and then the strands twisted to the left to produce the rope a. Lang lay b. Left lay c. Center lay d. Right lay - ANSWER b. left lay This consists of wires or strands twisted in the same direction. a. Lang lay b. Left lay c. Center lay d. Lang lay - ANSWER d. lang lay -Disadvantages include both ends need fastened to prevent unraveling -must not be used in single part lift or with swivels -cannot be used with slings and does not resist cutting Is more flexible has more area in contact with drum spools Wire ropes are classified by 4 factors number of ropes number of str