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The term "Superstructure or Upper works" refers to the area of the crane: Above the swing circle A crane must be level within _______% for the load chart ratings to be valid? 1% On what principle is crane stability based? Leverage What would be the effect of moving the tipping axis closer to the cranes center of gravity? Reduced stability Which of the following matches the appropriate load chart to a particular crane? Serial number A durable rating chart with legible letters and figures shall be provided with each crane accessible to: The operator at the controls The lifting capacities listed in the load chart assume that: The lift is to be performed under ideal conditions A "rough terrain" crane set up on outriggers that is based on 85% tipping should have the tires: Off the supporting surface Load charts are based on stationary loads, which are also known as: Static loads The capacity in a mobile crane's load chart are based on either structural limits or Stability The values listed in the manufacture's load chart show: Rated capacities Net capacity is: Manufactures load ratings minus capacity deductions
When determining the "gross load" the best method is: Get an accurate load weight and add the rigging The weights of load handling devices, such as load blocks, spreader bars, and slings are considered: Part of the load Gross capacity is 10,300 Ibs total deductions are 7,622 lbs. What is the net capacity? 2,678 lbs. Boom length is measured from the: Center of the heel pin(s) to the center of the boom tip sheaves The boom angle indicator indicates the booms angle to the: Horizontal Load radius is defined as: the horizontal distance from the centerline of rotation line with: The rated load suspended You are lifting a load directly under the hook. As you put tension on it, the load lifts away from crane. What caused the increased in load radius as should have been placed? Boom deflection A crane that is set up properly should have the tires off the supporting surface and should be: Sufficient to support the crane and the load When a boom extension considered to be inits stowed position, it is: Pinned to the boom base section Crawler cranes produce the least amount of ground pressure is over the: Side What is the best source of information for determining boom tip height? Working range diagram What is the purpose of a work area diagram (chart)? To identify operational quadrants Ona telescopic boom truck with outriggers properly positioned, the working area chart will indicate "over front" area is: Determined by the crane manufacturer When the load radius falls between capacities listed in the load chart use the gross capacity for the
The most commonly used rope for the hoist lines is right regular lay (RRL). How many random wires be remove a RRL wire from service? 6 in one lay or 3 in one strand in one lay Breaking strength divided by the design (safety) factor equals: Safe working load When retracting the boom on a telescopic boom crane: The hook and load decrease their height off the ground What is 77,208 divided by 8? 9, Which unsafe condition could result when a wedge socket is attached directly to a load hook, using 6x19? Spinning load When inspecting the boom on a telescopic boom crane which item should be inspected? Wear pads Hoist lines that are not in use hanging below the boom tip are usually considered a deduction. When would a hoist line not be considered a deduction? When it's on top of the boom When a crane operator leaves the crane, the operator must first: Land all suspended loads A load applied at an angle to the vertical plane of the boom describes: Side Loading What is the primary purpose of a power take off (PTO)? Provides power transfer to the hydraulic pump(s) Rapid hoist acceleration Produces hook loads higher than the actual load weight When is it permissible to leave a telescopic boom crane with the engine running? When operator can observe unauthorized entry The crane is performing a pick and carry operation. Some important factors that should be considered: the load being as low as possible, boom as short as possible, centered over the front quadrant
Tire pressure Load chart capacities distinguished in bold type, marked with an asterisk, in a shaded area or above a bold line of the capacity chart are based on: Structural strength The proper way to calibrate a boom angle indicator is: Boom up or down so the boom is horizontal and level than set the indicator at 0 degrees In what case is someone allowed to make modifications to the crane? When manufacture approves it in writing What is the acceptable maximum number of broken wires at an end connection before standing wire rope be replaced? 1 What affect does loosely spaced cribbing have on a crane and its float pads? Decreased stability and strength One purpose of a load moment indicator is to: Warn the operator of an overload condition According to ANSI B30.5, the minimum distance the flange of the drum shall extend over the top layer of wire rope is: 1/2 in. How does the operator verify that the operators aid readings for boom length, load radius, or boom angle are accurate? Actual measurements When is it permitted to bypass the Load Moment indicator LMI? During assembly and disassembly Rigging components, blocks, hooks, and other lifting equipment on a crane is considered part of the: Gross load All telescopic boom cranes are to be equipped with a load chart, a boom length indicator and: A boom angle indicator Who is to give the operator hand signals? The person(s) assigned prior to the lift When leaving telescopic boom cranes unattended overnight or for longer periods, the boom should
When operating a truck crane which of the following is the least stable allowable quadrant of operation? Side Cranes with suspended loads generate the highest ground pressure when working in which area? Corner The most common killer of ground personnel working around cranes is: Energized power line contact It must be assumed that power lines are: Energized According to OSHA 1926 Subpart CC, warnings for power lines must be: Visible in operator's cab and on outside of crane As the power line voltages intensify the minimum clearances: Increase In order for an overhead power line to be considered de-energized it must be verify by the Line owner According to OSHA 1926 Subpart CC, if any part of the equipment will get closer than 20 feet to the power line what is required? Dedicated spotter If an operator must leave the crane that is in contact with energized power lines and important precaution would be to: Avoid simultaneous contact with the crane and the ground ANSI/ASME B 30.5 requires a signal to observe power lines clearances and to be in constant communication with the operator when the crane is within: A boom's length of the limit of approach What is the proper procedure when using an insulating link or a boot near power lines? Be sure to maintain the correct allowable distance from the lines When a crane is working near power lines and the rotation of the load could become dangerous, you should: Use a dry polypropylene rope for a tagline When operating a crane in the vicinity of energized power lines less than 350kV but the exact voltage is unknown, you must maintain a clearance of at least:
20 ft. What is the minimum allowable distance that a crane may operate near energized power lines up to 50kV? 10 ft. Dynamic motion such as swinging with the load can result in side loading of the boom and: A reduction in the duty cycle chart What is the MINIMUM sheave size required for lower load blocks? 16 times the nominal diameter of the rope used According to OSHA, when a crane is in transit, what is the minimum clearance for power lines less than 50kV? 6 ft A luffing jib requires A limiting device How is a rope lay measured? The length along the rope in which one strand makes one revolution around the core When is it permitted to side load a crane boom? Only with a freely suspended load What is the primary purpose for installing a fixed jib on a crane? To increase the total height Float pads must: Be latched to jack To calculate net capacity, if the rating in a load chart is greater than the line pull you should: Use the permissible line pull of the wire rope and then make deductions What percentage of a crane's capacity is considered to be a critical lift? 75% If an operator lifts with an offset jib, the crane's capacity Is reduced Load chart ratings apply when the load line is: Vertical
Latch equipment hooks must be used unless: The application makes use of the latch impractical or unsafe Which type of hook is NOT permitted when people are in the fall zone? Sorting hook What should be used as a softener to protect slings from sharp corners? Split pipe sections Rotation resistant wire rope must be inspected more frequently because: Internal damage will occur more frequently Excessive side loading can occur when: Dragging a load Who is permitted to give the crane operator the stop signal? Anyone According to ASME B 30.5, two audible signals mean: Go forward Which crane hand signal is illustrated: Use whip line An auxiliary boom head/point keeps the main and the whip line separated and is intended to be used with: An auxiliary hoist Some very important factors that should be considered when performing multiple crane lifts are: having one lift director the cranes being level, not exceeding 75% of the rated capacity of each crane and: Cranes maintain a vertical hoist line When making a multiple crane lift is important for the operator to understand that the load increases at the suspended end and: If one crane lands the load the other crane may become overloaded
Construction site hazards and restrictions are located and identified by: A pre-operational work site inspection Why do crane manufacturers reduce load capacities for duty cycle operations? Because the creation of side loading forces How often must rigging be inspected? Each shift, prior to use An operator must test the brakes Each time a load that is 90% or more of the maximum line is handled According to ASME B30.5, if the power to the crane fails during operation, what is the FIRST action that should be taken? Set all brakes and locking devices What may be required while traveling a crane without a load on a job site under or near power lines? a dedicated spotter According to OSHA 1926 Subpart CC, the MINIMUM distance that must be maintained between any part of a working crane or load and an 8kV power line is 10 ft According to OSHA 1926 Subpart CC, for cranes traveling with no load, what is the minimum clearance power lines of 40kV? 6 ft The only time a suspended personnel platform is permitted to be used is when: Other methods would be more hazardous When lifting personnel platform, a telescopic crane does not have to be equipped with: Counterweight When lifting personnel what type of hook latch must be used? One that can be closed and locked According to OSHA 1926 Subpart CC, which is required if a telescopic boom crane is to be used to hoist a personnel platform? A crane equipped with a boom angle indicator When hoisting personnel a telescopic crane must be equipped with anti-block prevention system, a boom angle indicator and:
