Advanced Rigging Exam Questions with Complete Solutions Graded A+

  What is meant by the term two blocking? - Answer: The load block contacts the boom point sheaves. Lifting 20,000 lbs with a 2 leg bridle sling at 30* horizontal sling angle, what is the force applied to each leg? - Answer: 20,000 pounds In multiple crane lifts using an equalizer beam, The weight of the beam should be considered: - Answer: Part of the load weight What is required if there is a deviation from the plan lift? - Answer: A new plan lift On level ground using skids and rollers, what percent of the weight of the load should yield the required line pull as a general rule of thumb? - Answer: 5% All of the following are results of unbalanced reeving of the hook block EXCEPT: - Answer: Wear on the hook Before a spreader bar or beams can be used they must have been: - Answer: Tested and approved When materials are being hoisted to an upper level, a tagline is used to: - Answer: Help control the load Two cranes are lifting 100 tons if crane A has 40% of the load, how much weight will crane B have on its hook? - Answer: 60,000 lbs To confirm the rated capacity of a specific sling, consult the manufacturer 's - Answer: Sling Tag OSHA regulations require hook replacements if the opening exceeds what percentage of its original throat opening? - Answer: 15% At what percentage of increase in length should a change sling be removed from service? - Answer: 5% The methodical process that attempts to identify hazards and devise plans to overcome or eliminate hazards which may interfere with crane or rigging is called: - Answer: Lift plan What provides additional control of a load been lifted? - Answer: Tag lines When traveling on a rubber tire mobile crane, how should the boom be positioned? - Answer: In line with the direction of travel Before performing pick and carry operations with any mobile crane, it is important to: - Answer: Refer to the manufacturer's capacity chart According to ASMEB30.5,a two crane lift is signaled by: - Answer: One designated person What is The PRIMARY concern when working with high boom angles? - Answer: Backward stability On multiple crane lifts, the load on each crane should NOT exceed what percentage of capacity? - Answer: 75% What are lifting lugs? - Answer: Eyelets welded to a steel plate for lifting The formula for determining stress on a snatch block performing a vertical lift is: line pull x block factor= block load. What must be done to calculate formula? - Answer: Multiply the load wait by the coefficient of friction to determine line pull, and then use the standard formula If both fists are placed in placed in front of your body with your thumbs pointed outward, the crane operator should: - Answer: Extend the boom sections What is the MAXIMUM percent of the rated capacity of a crane that can be used to lift personnel? - Answer: 50% When does lightning present the greatest hazard to the crane and rigging personnel? - Answer: When thunder and lightening are apparent What force would be required to move in object up an in-dined plan compared to lifting it vertically? - Answer: 1 1/2 times more Personnel platforms shall NOT be used to lift: - Answer: Tools and materials without employees All of the following are reasons for stopping personnel lifting and operations EXCEPT: - Answer: There are no TAG LINES When working on close quarters, the main concern is: - Answer: SAFETY The point of any object's weight can be concentrated at: - Answer: Center of gravity In a spur-gear chain hoist with a two chain system, the endless chain is used to: - Answer: Raise and lower the load In an emergency situation, what is the rigger's FIRST priority? - Answer: To prevent injury or loss of life All of the following conditions exert dynamic loading on a crane EXCEPT: - Answer: Static boom angle Proper lead sheave placement as it relates to the hoisting drum location is: - Answer: Proper spooling of wire rope The most important information to consider when planning a lift is: - Answer: Weight of the load Prior to use, all new, altered, modified, or repaired rigging hardware shall be inspected by whom? - Answer: A designated person An unsafe condition that riggers should be aware of when dealing with a multi part load block is: - Answer: Twisting multi part lines Most cranes in duty cycle operation require a: - Answer: Load test The only person allowed to have their body parts outside of the suspended personnel platform during hoisting and lowering operations are: - Answer: Signal persons What is the most important reason rigging hardware should NOT be modified? - Answer: It could negatively affect its capacity In the term (D/d ratio) the d is an abbreviation for: - Answer: Diameter A document that outlines weights, crane configuration and rigging requirements for a lift is called a: - Answer: Lift plan When using a 1-inch wire rope sling in a vertical basket hitch lifting a 24- foot long, 36 inch diameter pipe, - Answer: 36 to 1 What is an LMI? - Answer: Load moment indicator Location of electrical hazards on the job site should be documented on a: - Answer: Lift plan When forming a lift plan, a PRIMARY concern for the person doing the rigging is: - Answer: Capacity of rigging When using a wedge socket, the dead end of the rope is secured in the socket by the; - Answer: Wedge When erecting or stowing a swing-away lattice extension, what should be used to control the movement of the extension? - Answer: Tag line Planning for rigging is required: - Answer: Only when lifting any load A lift plan MUST be completed by a: - Answer: Supervisor Anchorage points for fall arrest for a single person MUST be able to hold: - Answer: 5000 lbs Which of the following items are used for heavy rigging? - Answer: Slings, shackles, and spreader beam If the jacket of a synthetic round sling is damage, that sling should be: - Answer: Removed from service immediately Which of the following is NOT a factor when making submerged lifts? - Answer: Water temu When a tugger is mounted where the operator can NOT see the load, the signal person MUST use: - Answer: Signals used for cranes Who can design a personnel platform? - Answer: A qualified personnel A one-inch, 3 leg bridle wire rope sling, rigged at 35' angle, is good for 18 tons. The addition of a fourth leg will increase your capacity by: - Answer: 0 lbs After any structural repair of modification, a personnel lifting platform shall be tested to what percentage of the platform rating? - Answer: 150% All of the following statements about crane contact with power lines are TRUE EXCEPT: - Answer: The operator should leave the cab quickly as possible Loads introduced into the machine or its components due to accelerating or decelerating force is called: - Answer: Dynamic loading Using the sling chart provided, what is the rated capacity of a 1/2 inch sling in a basket hitch with sling legs 90 degrees? - Answer: 6,200 When lifting 100,00 pounds, the main load block must be reeved with how many parts of line? - Answer: 4 What standard hand signal is being communicated in the illustration? - Answer: Travel ( one track ) What standard hand signal is being communicated in the illustration? - Answer: Use whip line Using the chart, how many parts of line are needed to lift a load weighing 265,000 pounds? - Answer: 9 According to the table, what is the MINIMUM clearance a crane in operation can be from a 250 (kv) energized power line? - Answer: 20 feet Calculate the block load for block C in the drawing? - Answer: 12,000 lbs Calculate the block load for block B in the drawing? - Answer: 24,000 kbs A load will be moved using both a Maintowoc 4100W and a Grove TM 1500. Determine which configuration of each crane will be best suited to perform the multiple crane lifted as described using figure Man4100_Grove1500 load charts. Calculate the load on both cranes #1 and #2 then choose the appropriate answer below. Load radius at pick 35 feet, load radius at placement 45 feet. Load weight is 118,000 lbs. Dimension A=20 feet and B=40 feet. Each Beam Clamp has a weight of 500 lbs. - Answer: Crane #1 Maintowoc 4100W-S2 with 200 feet of main boom and a 100 ton block installed. Crane #2 Grove TM 1500 with 118 feet of main boom, with a 30 ton block installed.