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Before leveling a mobile crane on outriggers, an operator should ensure: - correct answers 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? - correct answers Keeping 90 degree angle between cylinder rod and pad What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - correct answers Separate the boom hoist lines How many randomly broken wires ina lay length must there be on a mobile cranes hoist line, before it should be removed from service? - correct answers 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? - correct answers 1 Type 1 rotation resistant hoist wire rope has a design factor of: - correct answers 5 to 1 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 The term net capacity is best defined by which of the terms listed below? - correct answers 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? - correct answers Manufacturer When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - correct answers 75% How does the effective weight of a slowed extension relate to the actual weight of the extension? - correct answers Higher than the actual weight. When load radius is between radii values, the operator must use the: - correct answers longer radius Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - correct answers They could cause a backward stability problem. A mobile crane's jib is offset 15° versus its original 0° offset, but the boom angle remains unchanged. In this situation, the load radius: - correct answers increases Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - correct answers 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: - correct answers 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? - correct answers 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? - correct answers Decreases stability. Backward stability of a mobile crane is tested in which configuration listed below? - correct answers Basic boom at minimum angle with no load Deflection of the boom while operating a mobile crane will increase? - correct answers Load Radius (Swings out) According to OSHA, mobile crane load blocks hooks must not have a throat opening in excess of: - correct answers 5% When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on: - correct answers 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? - correct answers Horizontal sling angle When installing a wedge socket, it must be attached with the load line pulling in a straight line from the: - correct answers pin What is the purpose of placing mats or cribbing under outrigger floats? - correct answers Distribute the force over a larger area Where is the best location for leveling a crane? - correct answers Upperworks When may blocking (cribbing) be placed under outrigger beams on mobile cranes? - correct answers Never approved Mobile cranes should be level to within what percent of grade? - correct answers 1% Timber crane mats work best when they are - correct answers Bolted together When arriving in the crane at the job site, the operator should first determine the condition of - correct answers access roads What surface listed below would NOT be a good location for assembly or setup of a mobile crane? - correct answers Above underground vaults Each outrigger pad and its blocking should be sufficient to support? - correct answers The total weight of the crane and its load How does high wind affect a mobile crane with a long boom? - correct answers Introduces side load onto the boom When is the only time the outrigger beams should be less than fully extended? - correct answers The load chart indicates that this is allowed. Eccentric main boom tip reeving causing which of the following: - correct answers Twisting of the main boom Which type of wire rope listed below is installed on most cranes? - correct answers 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. - correct answers 1/2 inch Which of the following is classified as a standing wire rope? - correct answers Pendant line. When lifting on outriggers the floats or pads should always be: - correct answers Raised to touch the tires firmly on the ground. What is the minimum design factor required for a regular lay, boom or hoist wire rope? - correct answers 3.5 It is important to know when lubricating crane hoist wire rope, that the lubricant must: - correct answers not hinder visual inspection How often is the competent person required to inspect the running wire ropes on a mobile crane? - correct answers Each shift On mobile cranes, 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 On mobile cranes, what does the boom angle indicator show the operator? - correct answers Angle of boom to horizontal What is the device called that automatically stops the boom when it nears the cranes maximum angle? - correct answers Boom hoist limiting When the number of layers of wire rope on a drum increases the: - correct answers Allowable line pull decreases On a mobile crane, side loading of the boom could be caused by which of the following? - correct answers Starting or stopping the swing too rapidly Which person listed below, has the responsibility for determining the correct weight of a load? - correct answers Lift Director What must an operator do when an operator leaves the controls of the crane from an extended period of time? - correct answers Apply all brakes and dogs, and lower the load to the ground When should a tag line be used, during the hoisting of material? - correct answers When the rotation of the load would be dangerous What percentage of the rated capacity of a mobile crane must be used when lifting with two cranes attached to the same load? - correct answers 75% When lifting a load with two mobile cranes, it is very important to: - correct answers Keep the hoist lines of both cranes vertical If lifting a load with two mobile cranes of different rated capacities, the crane with the larger rated capacity should: - correct answers Be hooked at a distance closer to the loads center of gravity When performing a multiple crane lift is is important for the operator's of each crane to understand that: - correct answers The weight may increase if the other crane lands the load When lifting loads that are submerged under water with a mobile crane, what is one of the conditions that the operator should be familiar with? - correct answers Load will increase when lifting the load out of the water When lifting over water with a personnel platform, what are the occupants of the platform required to wear? - correct answers A floatation device What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation resistant wire rope? - correct answers Not less than 18 times rope diameter When can capacity altering modifications be made to mobile cranes? - correct answers When permission is given by the crane manufacturer Acrane is at the point of instability when the crane's leverage on the load equals: - correct answers 100% of the load's leverage on the crane Who must determine maximum speed for a mobile crane to travel with a suspended load? - correct answers The competent person When traveling with a suspended load on a mobile crane climbing an incline, the load should be carried in which direction? - correct answers Uphill Which mobile crane boom configuration can cause the most hazardous side-loading condition for the crane? - correct answers Long boom with minimum radius When preparing to hoist a load, the load block hook should be positioned: - correct answers Directly above the load's center of gravity When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position? - correct answers Over the corner When personnel platforms are hoisted with a mobile crane what item listed below must be provided? - correct answers And anti two-block device OSHA 1926. 1431 states that tag lines must be used: - correct answers When necessary to control platform While hoisting in a personnel platform, direct communication must be maintained between the signal person and who? - correct answers Operator, Rigger According to OSHA 1926, 1431, at wind speed must a qualified person be consulted? - correct answers 20 mph According to OSHA, when working near power lines when is a dedicated spotter required? - correct answers When crane operator is unable to see the warning line of signs According to OSHA 1926 1408, when operating near high voltage power lines, what clearance shall be required when the rating of the lines is 275kV? - correct answers 20 feet w/encroachment precautions According to OSHA 1926. 1408, the minimum clearance between any part of the crane and power lines rated 50kV or below shall be: - correct answers 10 feet w/encroachment precautions According to OSHA 1926 1408, for power lines rated 100kV the minimum clearance between the crane and any lines shall be? - correct answers 15 feet w/encroachment precautions The term "jib offset" can be expressed as the jib angle to which mobile crane component listed below? - correct answers Boom On a mobile crane the term "part's of line" refers to which item listed below? - correct answers The number of lines running thru the load block and boom point sheaves What is the design factor for grade 80 chain slings? - correct answers 4 What grade alby steel chain should be used for hoisting slings? - correct answers 80 Loads rigged using a basket hitch should be to prevent slippage. - correct answers Balanced When slings encounter sharp edges on loads to be lifted, riggers shall ensure that slings are: - correct answers Protected or padded According to OSHA, quadruple sling bridle ratings are the same as - correct answers triple sling bridle ratings Which statement listed below is correct about basic load rigging? - correct answers As horizontal load angle decreases, stress increases The approximate percentage of strength of choker, vertical, and basket hitches respectively are: - correct answers 75%, 100%, 200% According to ASME which of the following listed below shall NOT be used for the suspension system on suspended personnel platforms? - correct answers Synthetic web bridle When rigging a bundle of pipe or tubing, which of the following would provide the best contact between sling and load? - correct answers Double wrap choker For any signal other than emergency stop, who is permitted to give hand signals to the crane operator during a lift - correct answers A qualified signal person Move slowly hand signal - correct answers Use whipline hand signal - correct answers What is the first element of voice signals given to a crane operator prior to the lift? - correct answers Function and direction According to OSHA, each series of voice signals contain how many elements? - correct answers Three 
