TOWER CRANE QUESTIONS AND ANSWERS.

Which of the following OSHA regulations govern suspended personnel platforms? OSHA 1926.1431 According to ASME B30.3 The prohibited zone for power lines that are 60 kV is 15 ft Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:05 / 0:15 Full screen According to ASME B30.3, load hoist rotation resistant wire rope has a design factor of 5 to 1 According to ASME B30.3 when Lifting a suspended personnel platform design factor for the rigging hardware is 5 to 1 According to ASME B30.3 Load hoist ropes that are not rotation resistant must have a design factor of 5 to 1 The OSHA construction standard for rigging equipment is 1926.251 According to ASME B30.3 on who's recommendations should a preventative maintenance program be set up? Crane manufacturer When using cable or nylon spreaders it is important to remember: The lower the spreader angle the greater the tension According to OSHA when testing a man basket how long must the test pick be maintained? 5 minutes According to ASME B30.3 What is the minimum pitch diameter for load hoisting sheaves? Not less than 18 times rope diameter According to ASME B30.3 what is the minimum pitch diameter for load block sheaves? Not less than 16 times rope diameter According to ASME B30.3 what is the minimum pitch diameter for boom hoist sheaves? Not less than 15 times rope diameter According to OSHA when lifting personnel the cranes hook must be the type that Can be closed and locked According to OSHA when working over water with a man basket are the people inside required to wear a belt/harness? No harness or belt required According to ASME B30.3 when working near powerlines where should caution stickers be installed? Operator station and at the base of the crane According to OSHA a frequent inspection is: Daily to monthly According to OSHA a periodic inspection is: Monthly to annually Cranes idle for more than six months must have inspections performed: Frequent and periodic Cranes idle for less than six months must have inspections performed: Frequent Cranes lifting personnel platform must have the platform and rigging inspected: Prior to each shift Crane hooks must not be twisted in excess of: 10 degrees A Crane hook's throat must not exceed: 15% of its original size By order of hitch strength which is the correct answer? Basket,vertical ,choker According to ASME B30.3 And OSHA you should always have at least how many wraps on the hoist drum? 2 What is the minimum allowable distance from the crane and power lines under 50 kV? 10 ft According to ASME B30.3 How many randomly broken wires must there be to remove a running wire rope from service? 12 According to ASME B30.3 when working near power lines when is a signal person required? When crane moves within a booms length of power lines According to OSHA after the crane has been checked out and before personnel lift operations begin the crew should: Have a pre-lift meeting According to OSHA when is it safe to work closer than the allowable distance from power lines? When utility company says lines are De-Energized When should a tagline be used? When rotation of load would be dangerous What is the minimum design factor required for a boom hoist rope? 3.55 How many broken wires must be present in one strand of one lay for running wire rope to be removed from service? 4 What is the maximum permitted wind speed when climbing a tower? 20 mph According to ASME B30.3 A crane should be plumbed to: 1 to 500 According to ASME B30.3 The rated load under static conditions shall not exceed _________ of calculated tipping loads 63% According to AMSE B30.3 an overhead powerline is ALWAYS considered to be: Energized until the power company has verified it is not energized High tensile bolts shall be marked with manufacturers designation and: Strength rating Bolt connections for tower sections must use high tensile strength nuts with ratings of: 12 Washers used in high tensile bolt connections shall be marked with: HV Before installation high tensile bolt connection Components shall be cleaned and visually examined for: Damage and corrosion When ready to torque the nut on a high tensile bolt connection you should: Lubricate threads During tightening of high tensile connections the bolt is stretched to a specific percentage of its elastic limit at the correct: Torque Preferably the tightening torque shall be applied to the: Nut The tightening torque values placed on the nuts and bolts of high tensile bolt connection are dependent on the: Type and size What components of a tower crane are connected with high tensile bolt connections? Foundation anchors, tower sections, slewing ring support When the Tower base bolts are torqued the counter jib should be positioned: 0° from the bolt According to the NCCCO tower crane reference manual what items below should be part of the operators Daily pre-check? Wire ropes, limit switches According to the NCCCO tower crane reference manual, how many safety turns (wraps) must be left on the hoist drum when the load hook is in its lowest position? 3 According to the NCCCO tower crane reference manual,when possible, installing the hoist wire rope on a tower crane you should wind the rope with approximately how much of the maximum permissible load? 10% According to ASME B30.3, what is the design factor for rotation resistant load hoist wire rope? 5.0 to 1 Who determines the correct hoist wire rope to be installed on tower cranes? Manufacturer What grade alloy steel chain should be used for crane hoisting slings? 80 According to ASME B30.3, using rotation resistant running rope on a tower crane, how many broken wires in six rope diameters can you have to leave it in service? 1 According to ASME B30.3, a periodic inspection of tower cranes wire rope shall be performed at least? Annually According to ASME B30.3, which inspection does not require records to be kept? Frequent Wire rope lubricant is very important. It should be applied according to who's recommendations? Manufacturer When you have core failure in wire rope, a common result is? Reduction in diameter According to OSHA 1926.550, who is responsible for machinery and equipment inspection before each use? Foreman When is it permitted to shift the hoist gear of a tower crane? Neutral gear According to ASME B30.3 , an overhead powerline is ALWAYS considered to be: Energized until the power company has verified it is not energized According to ASME B30.3, Maintenance personnel are permitted to operate the crane only when: Performing their duties According to ASME B30.3, Who should be present when telescoping or climbing operations begin? Operator According to OSHA 1926.550, when a wire rope bridal is used to connect a personnel platform to the load line, each bridal leg shall be connected to a: Master link Hand signals to construction tower crane operators shall be those prescribed by: ASME B30.3 According to OSHA 1926. 550, what shall be provided at both ends of travel of the trolley? Buffers According to ASME B30.3, All controls shall be tested by the operator: At the start of a new shift