Describe the four most commonly used rigging materials
What will be an ideal response?
Welded alloy steel chains. Such chain slings must have permanently affixed, durable identification information including size, grade, rated capacity, and sling manufacturer. Welded alloy steel chains must conform to the values shown in Table H-1 . Whenever any point of any chain exceeds the wear limits specified in Table H-2, it must be removed from service.
Wire rope. Wire rope and wire rope slings must conform with the values set forth in Tables H-3 through H-14 . When the sizes, classifications, and grades of wire rope are not covered in one of these tables, the manufacturer's specifications may be used provided a safety factor of five is added in.
Web slings. Web slings made of synthetic material must be permanently marked with the manufacturer's name, stock number, rate loads for various types of hitches, and type of material. Rated capacities must not be exceeded. The safety factor of web slings should be five to one in accordance with ANSI B30.9A. The slings must be load tested to at least twice the rated load. Nylon, polyester, and polypropylene web slings, as well as slings with aluminum fittings, should not be used where caustic materials in any form (fumes, vapors, sprays, mists, liquid acids) are present.
Shackles and hooks. The manufacturer's specifications should be used to determine the safe loads for various types of hooks. If manufacturer's specifications are not available, the company should test hooks to twice the planned safe working load and keep accurate, dated records of the tests.
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A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
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A. Litmus paper B. Refractometer C. Thermometer D. Hydrometer
Series-wound electric motors ________
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