NCCCO CRANE FINAL EXAM QUESTIONS AND ANSWERS LATEST UPDATE 2024/2025 (100% CORRECT)

Before leveling a mobile crane on outriggers, an operator should ensure: - ANSWER 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? - ANSWER Keeping 90 degree angle between cylinder rod and pad What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - ANSWER 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? - ANSWER 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? - ANSWER 1 Type 1 rotation resistant hoist wire rope has a design factor of: - ANSWER 5 to 1 How many randomly distributed broken wires in rotation- resistant hoist wire rope are considered for replacement? - ANSWER 2 broken wires in 6 rope diameters The term net capacity is best defined by which of the terms listed below? - ANSWER 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? - ANSWER Manufacturer When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - ANSWER 75% How does the effective weight of a slowed extension relate to the actual weight of the extension? - ANSWER Higher than the actual weight. When load radius is between radii values, the operator must use the: - ANSWER longer radius Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - ANSWER They could cause a backward stability problem. NCCCO CORE FINAL EXAM QUESTIONS AND ANSWERS LATEST UPDATE 2024/2025 (100% CORRECT) 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: - ANSWER increases Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - ANSWER 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: - ANSWER 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? - ANSWER 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? - ANSWER Decreases stability. Backward stability of a mobile crane is tested in which configuration listed below? - ANSWER Basic boom at minimum angle with no load Deflection of the boom while operating a mobile crane will increase? - ANSWER Load Radius (Swings out) A sudden start or stop of the hoisting function while operating a mobile crane can produce a: - ANSWER dynamic load Before lifting an occupied personnel platform on a job site, which of the following applies? - ANSWER Use 50% of rated capacity, Trial lift to anticipated weight, Ensure rigging dedicated to platform only. According to OSHA 1926. 1431, while hoisting a personnel platform, what weather condition listed below will promptly discontinue the operation? - ANSWER Dangerous If working near overhead power line and using a tag line, which type of rope is least conductive to electricity? - ANSWER Polypropylene When working near power lines with the mobile crane, where does OSHA require caution stickers be installed on all equipment? - ANSWER At operators station and 2 on the outside of the equipment. According to OSHA table T, what is the minimum clearance for 133kV power lines? - ANSWER 10ft According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep while going under 445kV lines? - ANSWER 16ft According to OSHA when is it safe to hoist loads with a mobile crane below energized power lines? - ANSWER When the fully extended boom can't reach the prohibited zone. According to OSHA 1926. 1411, when you encounter power lines with a voltage of 44kV and the crane is TRAVELING, according to Table T, what is the minimum required clearance? - ANSWER 6ft According to OSHA, mobile crane load block hooks must not have a twist in excess of: - ANSWER 0 According to OSHA, mobile crane load blocks hooks must not have a throat opening in excess of: - ANSWER 5% When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on: - ANSWER the dead or short end What is the angle between the top of the load and the sling leg referred to in sling load charts? - ANSWER Horizontal sling angle When installing a wedge socket, it must be attached with the load line pulling in a straight line from the: - ANSWER pin What is the purpose of placing mats or cribbing under outrigger floats? - ANSWER Distribute the force over a larger area Where is the best location for leveling a crane? - ANSWER Upperworks When may blocking (cribbing) be placed under outrigger beams on mobile cranes? - ANSWER Never approved Mobile cranes should be level to within what percent of grade? - ANSWER 1% Timber crane mats work best when they are - ANSWER Bolted together When arriving in the crane at the job site, the operator should first determine the condition of - ANSWER access roads What surface listed below would NOT be a good location for assembly or setup of a mobile crane? - ANSWER Above underground vaults Each outrigger pad and its blocking should be sufficient to support? - ANSWER The total weight of the crane and its load How does high wind affect a mobile crane with a long boom? - ANSWER Introduces side load onto the boom When is the only time the outrigger beams should be less than fully extended? - ANSWER The load chart indicates that this is allowed. Eccentric main boom tip reeving causing which of the following: - ANSWER Twisting of the main boom Which type of wire rope listed below is installed on most cranes? - ANSWER Right regular lay The hoist drum flange shall extend a minimum of ________ over the top layer of wire rope at all times while crane is in operation. - ANSWER 1/2 inch Which of the following is classified as a standing wire rope? - ANSWER Pendant line. When lifting on outriggers the floats or pads should always be: - ANSWER Raised to touch the tires firmly on the ground.