NCCCO Core Questions with Correct Answers Wire rope installed on most cranes - Correct Answers Right Regular Lay How many randomly broken wires in a lay length must there be on a mobile cranes hoist line before it should be removed from service? - Correct Answers 6 Minimum design factor required for a right regular lay, boom or hoist wire rope - Correct Answers 3.5 How many broken wires are permitted at the end connection of a pendant before it must be taken out of service - Correct Answers 1 Type 1 rotation resistant hoist wire rope has a design factor of: - Correct Answers 5 to 1 How many broken wires must be present in one strand of one lay for running wire rope to be removed from service - Correct Answers 3 How many randomly distributed broken wires in rotation resistant hoist wire rope are considered for replacement - Correct Answers 2 broken wires in 6 rope diameters Should the load be applied when determining the proper boom angle - Correct Answers Yes When lifting loads on tires, cranes are rated at what percentage of tipping? - Correct Answers 75% How does the effective weight of a stowed extension relate to the actual weight of the extension - Correct Answers Lower than the actual weight When load radius is between radii values, the operator must use the: - Correct Answers Longer radius Increasing the distance from the cranes center of gravity to the tipping axis will have what effect on a mobile crane? - Correct Answers Increase stability What is the minimum pitch diameter used for sheaves in a boom hoist reeling system - Correct Answers Not less than 15 times rope diameter
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