NCCCO CORE Questions | 100% Correct Answers | Verified | Latest 2024 Version

Before leveling a mobile crane on outriggers, an operator should ensure: - there is no weight of the crane bearing on any tires Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered? - Keeping 90 degree angle between cylinder rod and pad What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - Separate the boom hoist lines 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? - 6 On a mobile crane, how many broken wires are permitted at the end connection of a pendent before it must be taken out of service? - 1 Type 1 rotation resistant hoist wire rope has a design factor of: - 5 to 1 How many randomly distributed broken wires in rotation- resistant hoist wire rope are considered for replacement? - 2 broken wires in 6 rope diameters The term net capacity is best defined by which of the terms listed below? - Gross capacity minus capacity deductions Mobile cranes that are set up on barges, shall have a list chart provided by which of the entities listed below? - Manufacturer When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - 75%How does the effective weight of a slowed extension relate to the actual weight of the extension? - Higher than the actual weight. When load radius is between radii values, the operator must use the: - longer radius Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - They could cause a backward stability problem. A mobile crane's jib is offset 15º versus its original 0º offset, but the boom angle remains unchanged. In this situation, the load radius: - increases Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - Collapsing the boom. When determining the position to a mobile crane should be left in over night, when high winds in the forecast the operator should: - Follow the manufacturers recommendations. If a mobile crane is NOT set-up level and the operator swings the load from the high side to the low side, what effect will that have on the radius? - The radius increase. Increasing the distance from the crane's center of gravity to the tipping axis will have what effect on the mobile crane? - Decreases stability. Backward stability of a mobile crane is tested in which configuration listed below? - Basic boom at minimum angle with no load Deflection of the boom while operating a mobile crane will increase? - Load Radius (Swings out) A sudden start or stop of the hoisting function while operating a mobile crane can produce a: - dynamic load Before lifting an occupied personnel platform on a job site, which of the following applies? - Use 50% of rated capacity, Trial lift to anticipated weight, Ensure rigging dedicated to platform only.