Ipt Chicago Rigging Exam Questions With Answers

Ipt Chicago Rigging Exam Questions With Answers The two types of wire rope center core designs are fiber core and independent wire rope core. T or F - ANSWER- True What is the percentage gain in strength using an IWRC versus fiber core wire rope? - ANSWER- 7.5% What characteristic increases in a wire rope by using a rope with more strands and more wires in the strands? - ANSWER- Flexibility Grade 110/120 improved plow steel has the highest tensile strength of an type of wire rope. T or F - ANSWER- False A regular lay wire rope has strands and wires in the strands that: - ANSWER- are laid in opposite directions Due to tendency to unwind, which wire rope should NOT be used on single part hoisting lines? - ANSWER- Lang Lay A 6x19 wire rope classification could have as many as 16 to 26 wires per strand. true or false - ANSWER- true Which wire rope classification is listed as non-rotating? - ANSWER- 35 strand When a non-rotating rope is used in a wedge socket, care must be taken to prevent: - ANSWER- core slippage When hoisting personnel on a crane equipped with rotating resistant wire rope, what is the design (safety) factor required by most safety standards? - ANSWER- 10:1 Newer designs of wire rope with shaped wires and triangular strands are an attempt to prevent rope damage from: - ANSWER- multiple drum layers,cross winding, improper tension all of the above Referring to the number of broken wires allowed in a wire rope "the rule of thumb" for determining replacement is - ANSWER- 3/6 Wire rope should be replaced if the wear in the outer strand wires exceeds - ANSWER1/3 of original diameter When inspecting wire rope, interior broken wires and corrosion can be checked by magnetic particle testing...T or F - ANSWER- true Corrosion of wire rope is usually caused from - ANSWER- metal fatigue, broken wires, high speed operation, all of above Which product below is considered suitable lubricant to use on a wire rope? - ANSWER- light mineral oil To avoid kinking wire rope when spooling it onto a drum from shipping reel. the operator should always - ANSWER- allow the reel to rotate freely What is the Rule of thumb formula to find the ultimate load(breaking strength) of an IWRC wire rope? - ANSWER- D2x45 When the ultimate load of a wire rope is divided by a safety factor, the result is called the - ANSWER- working load limit (SWL) What happens when a wire rope is bent around a sheave or a hook? - ANSWERnominal strength is reduced A 1 in wire rope eye sling (no thimble) lifting a load with a 1 in shackle will be approx how efficient? - ANSWER- 50% Referring to slings, the terms"rated capacity" or "working load limit" replaces the old terminology of - ANSWER- safe working load limit