Rigging and Lifting

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Rigging and Lifting
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Rigging and Lifting
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  1. The most critical factor in rigging and lifting is what? NJATC, Rigging & Lifting principles, 2010 PP 2
    The weight of the load.
  2. To obtain the full load weight, what is added to the total load weight? NJATC, Rigging & Lifting principles, 2010 PP 3
    The weight of the rigging equipment.
  3. The weight of linear stock material is calculated by applying what formula? NJATC, Rigging & Lifting principles, 2010 PP 3
    • W total = N x L x Wl
    • where
    • W total =weight total (lbs)
    • N = number of pieces
    • L = length
    • Wl = linear unit weight (lbs/ft)
  4. Load weights of plates or sheets are calculated using what formula? NJATC, Rigging & Lifting principles, 2010 PP 4
    • W total = N x L x W x Wa
    • where W total = weight total (in lb)
    • n= number of pieces
    • l = length (in ft)
    • w = width (in ft)
    • Wa = area unit weight (in lb/sq ft)
  5. the area of a circle is calculated using what formula? NJATC, Rigging & Lifting principles, 2010 PP 4
    • A cir = PIE R(squared)
    • where area is in square feet
  6. The area of a cylinder is calculated by what formula? NJATC, Rigging & Lifting principles, 2010 PP 5
    A cyl = 3.14d x h (in feet)
  7. If one point is closer to the center of gravity, it supports more, or less of the load? NJATC, Rigging & Lifting principles, 2010 PP 7
    more.
  8. A thick metal loop welded or fastened to a load to provide a lift point is defined by what term? NJATC, Rigging & Lifting principles, 2010 PP 7
    Lifting lug.
  9. Only what type of eyebolts should be used for lifting applications? There are 3 types, what are they? NJATC, Rigging & Lifting principles, 2010 PP 8
    • Forged.
    • Machinery, Regular nut, shoulder nut.
  10. A __________ eyebolt is usually threaded into a hole in the load. NJATC, Rigging & Lifting principles, 2010 PP 8
    regular nut
  11. If the hole does not go through the load, the depth should be at least ________ times the eyebolt diameter. NJATC, Rigging & Lifting principles, 2010 PP 8
    2.5 times the eyebolt diameter
  12. Angular forces should only be applied to an eyebolt that is firmly supported against what? NJATC, Rigging & Lifting principles, 2010 PP 9
    The load surface by a shoulder
  13. A sling is a lined used to lift, lower, or carry a load. Slings are needed for lifting when? NJATC, Rigging & Lifting principles, 2010 PP 10
    There are no existing attachment points, such as eyebolts, on a load or when the hoist hook cannot directly attach to the load.
  14. A sling hitch is different from a sling line in what way? NJATC, Rigging & Lifting principles, 2010 PP 11

    Basic sling hitches include what arrangements? NJATC, Rigging & Lifting principles, 2010 PP 11
    A sling hitch is a sling arrangement that has a loop at both ends to rig a load for lifting.

    Vertical, bridle, basket, and choker
  15. smaller sling angles result in greater or less sling forces? NJATC, Rigging & Lifting principles, 2010 PP 12
    more.
  16. When calculating the distribution of load weight and sling arrangements with three or more legs, how many legs are assumed to carry no load weight? NJATC, Rigging & Lifting principles, 2010 PP 16
    One
  17. Wire ropes have high strength, fiber ropes have high flexibility and are particularly suitable as the lifting line when? NJATC, Rigging & Lifting principles, 2010 PP 17
    Wire with cranes and fibers with pulleys.
  18. The maximum weight a rigging component may be subjected to? NJATC, Rigging & Lifting principles, 2010 PP 20
    Working load limit.
  19. Safety factors in rigging and lifting are normally between what? NJATC, Rigging & Lifting principles, 2010 PP 20

    The Safety factor for chains are between what?NJATC, Rigging & Lifting principles, 2010 PP 40
    Five and eight.

    3.5 and 5
  20. The nominal breaking strength of rope is often rated in what? NJATC, Rigging & Lifting principles, 2010 PP 20
    Tons.
  21. Rope breaking strength rating needed to safely lift a load is calculated with what formula? NJATC, Rigging & Lifting principles, 2010 PP 20
    • Sb = WLL x SF
    • Sb = rope breaking strength in pounds.
    • WLL = working load limit
    • SF = Safety Factor
  22. What should be done to wire ropes to prevent rusting? NJATC, Rigging & Lifting principles, 2010 PP 22
    They should be lubricated.
  23. What type of rope should never be used in an area exposed to chemicals? NJATC, Rigging & Lifting principles, 2010 PP 22
    Natural fiber
  24. Wire wrapping that binds the end of a wire rope near where it is cut is called what? NJATC, Rigging & Lifting principles, 2010 PP 23
    Seizing
  25. Twine wrapping that binds the end of a fiber rope near where it is cut is called what? NJATC, Rigging & Lifting principles, 2010 PP 23
    Whipping
  26. Seizing/whipping requirements are based on what? NJATC, Rigging & Lifting principles, 2010 PP 23
    Size of the rope.
  27. Common wire ropes that are not pre-formed or rotational resistant normally require a minimum of ____ seizings on each side of the cut placed _____rope diameters apart. NJATC, Rigging & Lifting principles, 2010 PP 23
    Two and six
  28. What is preferred when cutting wire rope? NJATC, Rigging & Lifting principles, 2010 PP 23
    An oxyacetylene torch because the heat also fuses the strands.
  29. Grades of wire rope are? Use the acronym TMPIE. NJATC, Rigging & Lifting principles, 2010 PP 24
    • Traction steel (TS)
    • Mild Plow Steel (MPS)
    • Plow Steel (PS)
    • Improved Plow Steel (IPS)
    • Extra Improved Plow Steel (EIPS)
  30. The most common wire strand pattern designs are? NJATC, Rigging & Lifting principles, 2010 PP 25
    • Filler Wire, Warrington, Seale, Warrington-Seale
  31. How is fiber rope constructed? NJATC, Rigging & Lifting principles, 2010 WB 7
    By twisting fibers into yarn, yarn into strands, and strands into rope.
  32. A designation for the direction in which the strands are twisted, specified as they spiral away from the observer defines what? NJATC, Rigging & Lifting principles, 2010 WB 8
    Lay
  33. Yarn or wire in the strands are twisted in the opposite direction to the lay of the strands defines what? NJATC, Rigging & Lifting principles, 2010 WB 8
    Regular lay
  34. Which type of lay is defined by its yarn or wires crossing the axis of the rope at approximately 45 degrees? NJATC, Rigging & Lifting principles, 2010 WB 8
    Lang lay
  35. What is a rope's tendency to rotate and untwist when under load? NJATC, Rigging & Lifting principles, 2010 WB 8
    Cabling
  36. A rope with less twist is what?
    A rope with more twist is what? NJATC, Rigging & Lifting principles, 2010 WB 8
    • Soft lay is less
    • Hard lay is more
  37. bending a rope over a small diameter can reduce it effective strength by more than what percent? NJATC, Rigging & Lifting principles, 2010 WB9
    50%
  38. bending efficiency can be increased when what are used in rope ends or rope loops? NJATC, Rigging & Lifting principles, 2010 WB9
    Thimbles
  39. how is a wire rope classified? NJATC, Rigging & Lifting principles, 2010 WB 10
    By the number of strands in the rope & the number of wires in each strand.
  40. A socket that is compressed onto the end of a wire rope is called what? NJATC, Rigging & Lifting principles, 2010 WB10
    • swage socket
  41. A socket that uses molten zinc or resin to secure the end of a wire rope inside the socket is called what? NJATC, Rigging & Lifting principles, 2010 WB10
    spelter socket
  42. A splice can retain up to ____ percent of the original strength of the rope? NJATC, Rigging & Lifting principles, 2010 WB10
    95%
  43. _____Is a splice tat finishes a rope end by braiding its loose strands back on itself. NJATC, Rigging & Lifting principles, 2010 WB10
    crowning
  44. Webbing for rigging purposes is woven from what two types of fibers? NJATC, Rigging & Lifting principles, 2010 WB23
    nylon or polyester
  45. Warrington wire pattern is easily distinguished by what? NJATC, Rigging & Lifting principles, 2010 PP 25
    It's alternating large and small wire sizes in the outer layer.
  46. Wire rope sockets include what designs? NJATC, Rigging & Lifting principles, 2010 PP 27
    swage, spelter, and wedge
  47. In a wedge socket The live end and dead end must be what? NJATC, Rigging & Lifting principles, 2010 PP 27
    • Live end must be in line with the socket and the dead end must be a minimum of eight rope diameters extending out of the wedge.
  48. Fibers used in the manufacturing of rope include what? NJATC, Rigging & Lifting principles, 2010 PP 28

    Common manila rope classifications include what?
    yacht rope, number 1, number 2, and hardware.

    Only what classification should be used for lifting?
    • manila, hemp, cotton, and sisal.
    • yacht rope, number 1, number 2, and hardware.
    • yacht and number 1
  49. Synthetic materials used for lifting ropes include? NJATC, Rigging & Lifting principles, 2010 PP28

    Synthetic fiber is different from fibers how? NJATC, Rigging & Lifting principles, 2010 PP28
    nylon, polypropylene, polyesters (such as Dacron), and aramids (such as kevlar).

    They are continuous throughout the rope's length.
  50. The part of a rope that is the portion that is unaltered or not involved in making a knot or hitch is called what? NJATC, Rigging & Lifting principles, 2010 PP29
    The standing portion.
  51. A splice that forms a loop at the end of a rope is what? NJATC, Rigging & Lifting principles, 2010 PP31
    eye loop.
  52. What determines the duty rating of webbing? NJATC, Rigging & Lifting principles, 2010 PP35

    What is an edge treatment on woven material that prevents unraveling? NJATC, Rigging & Lifting principles, 2010 PP34

    Web sling components consist of what? NJATC, Rigging & Lifting principles, 2010 PP35
    number of plies.

    selvedge.

    length, body, splice, and loop eye.
  53. Webbing material is broadly classified as what class for its breaking strength? NJATC, Rigging & Lifting principles, 2010 PP36

    These classes have what breaking strength?
    Class 5 or 7

    • Class 5 is tensile strength of 6800lb/in
    • Class 7 is tensile strength of 9800lb/in
  54. Chain has approximately how many times the impact absorption capability of wire rope and more flexibility. NJATC, Rigging & Lifting principles, 2010 PP39

    Wire rope is cheaper or more expensive than chain and has how much of the expected service life in percentage?
    3 times.

    Wire rope is more expensive and has 5% of the service life of chain.
  55. Of the many types of chain specified, only Grade ____ and grade ______ should be used for sling or tie down applications. NJATC, Rigging & Lifting principles, 2010 PP39

    They must include em-bossed identifying markings at intervals no greater than what?

    Grade codes for 80 and 100 vary how in their markings?
    80 and 100.

    3 feet.

    by the number of ending zeros. Such as 80= 800, 8000.
  56. Chain included with a hoist may not display a grade number because it is designed for the hoist mechanisms. However, its strength is at least as strong as what? NJATC, Rigging & Lifting principles, 2010 PP40
    The hoists rating.
  57. What is the load limit reduction of a shackle when the lifting angle of the sling connected to it is at 45 degrees? NJATC, Rigging & Lifting principles, 2010 PP 44
    • 30%
  58. What is the minimum recommended information that should appear on a rigging inspection record? NJATC, Rigging & Lifting principles, 2010 PP30
    Acronym: Some Slings Might Risk Accidental Cuts (or) Wear
    • Serial number
    • Size
    • Manufacturer
    • Rated capacity
    • Attachments
    • condition of components
    • Whether component should be de-serviced
  59. A block is what? NJATC, Rigging & Lifting principles, 2010 PP 56

    Reeving is what?

    A part is what?
    An assembly of one or more pulleys in a frame

    The passing of a rope through an opening or around a pulley

    A rope length between a hook and block or between two blocks
  60. The amount of static force required to hold a load is calculated with what formula? NJATC, Rigging & Lifting principles, 2010 PP 57
    • Fs = Wtotal/N
    • Fs = static force
    • Wtotal = weight total
    • N= total number of parts (rope length between a hook and block or between 2 blocks) the number of pulleys is assumed to equal the number of parts
  61. Plain bearing pulleys typically add _____to_____% friction where Ball or Bearing pulleys typically add _____ to _____% friction. NJATC, Rigging & Lifting principles, 2010 PP 58
    • 5 to 8
    • 3 to 5
  62. In a block and tackle assembly, do any two pulleys travel at the same speed? NJATC, Rigging & Lifting principles, 2010 PP 59

    A block loading factor is based on what? NJATC, Rigging & Lifting principles, 2010 PP 60
    No.

    The angle between the lines.
  63. The formula for the block loading force is what? NJATC, Rigging & Lifting principles, 2010 PP 60
    • Fbl= Fll x fbl
    • Fbl= block loading force in lbs
    • Fll=lead-line force (lbs)
    • fbl=block loading angle factor
  64. Torque is what type of force? NJATC, Rigging & Lifting principles, 2010 PP 61
    Rotational.
  65. Most hoists use what type of gear drives? NJATC, Rigging & Lifting principles, 2010 PP 61

    What type of gear does not permit reverse?
    Worm gears or bevel gear drives.

    Worm.
  66. The pattern in which rope should be wound onto a drum depends on what? NJATC, Rigging & Lifting principles, 2010 WB 33
    the rope lay and direction.

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