Rope and Wire Rope Properties and Usage, Exams of Nursing

Download Rope and Wire Rope Properties and Usage and more Exams Nursing in PDF only on Docsity! 1 | P a g e UA RIGGING FINAL EXAM 2024-2025 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|NEWEST|GUARANTEED PASS |LATEST UPDATE A crane shall be set up on footing level within x% 1% what are the four requirements of rope fastening? strong knot, will not slip, tied and untied easily what is the % of swl allowed for a straight/vertical hitch attached to a hook on a load? 100 what % of swl for a choker hitch? 75% what % of swl for a basket hitch? 200% how do you find the swl for a single vertical wire rope sling? square the diameter and multiply by eight how do you find the swl for a 2 leg bridle sling? wire rope swl x (height/length) x 2 how do you find the swl for a 3 and 4 leg bridle sling? same formula as two leg but with 3 instead of 2 multiplying the product what is regular and lang lay? in a lang lay, the wires or yarns are wound the same way as the strands are around the core. in a regular lay, the wires or yarns are wound in the opposite direction as the strands around the core. 2 | P a g e how do you find the swl for a piece of rope based on the breaking strength? divide the breaking strength by the safety factor. True or false: regular right laid rope should be uncoiled counterclockwise true True or false: all natural fiber rope is biodegradable true What is a lay? (as a noun) the distance it takes to make one complete wrap or revolution with a strand First grade or #1 manila can be identified by? the inner wound colored strip what is the strongest synthetic fiber rope mentioned in chapter 1? nylon rope size is designated by which dimension? diameter what is the first step in any rigging operation? determine the weight of the load what is the swl multiplier for manila rope? 20 what is the swl multiplier for polypropelyne? 40 what is the swl multiplier for nylon or polyester? 60 What is the swl multiplier for polyethylene? 35 how do you find the swl of a particular rope using the rule of thumb? take the diameter and convert it to eighths, then take the numerator and square it. multiply the product by the specific multiplier for the type of rope (i.e 35 for polyethylene) a splice, even on a new rope, reduces the load carrying ability by what percentage? 15% 5 | P a g e false t/f, choker hitches distribute the load equally between two legs of a sling basket hitches do that! a one inch wire rope sling eye with no thimble lifting on the bow of a one inch shackle will be approximately how efficient? 100% efficient when slinging a bundle of pipe or tubing, which would provide the best contact between sling and load? a) double basket b/ bridle hitch c/ two double wrap choker hitches d/ single leg choker two double wrap choker hitches Using two slings to lift a load, at what degree angle to the horizontal is the load on each sling considered to be equal to the weight of the load? at the 30 degree mark keep sling angle at not more than how many degrees for maximum security and good practice? 45 degrees if the load is rigid on a three or four legged sling, for purposes of determining individual sling loads what's a good rule of thumb? two slings should be able to equally split the weight of the load where is the maximum rating of a crane? at fixed length and near its vertical position extend boom Two hands: both fists in front of body with thumbs pointing outward. hoist signal 6 | P a g e wheel travel signal fingers pointing up, palm facing forward, pushing in the direction the wheels need to roll raise boom move slowly use whipline trolley travel swing 7 | P a g e Extend Boom (One Hand) one fist in front of chest, thumb pointing outward and heel of fist tapping chest. tower travel lower boom raise load lower boom dog everything 10 | P a g e A ___ hitch is used for attaching the end of a rope to an object for a right-angle pull, as in the case of guy lines. clove A ___ will not slip or draw tight under heavy loads. double sheet bend A ___ is used to attach a hook such as a tackle block at any point on a rope between its ends. catspaw knot A ___ hitch is used to hold a load or to lower a heavy load slowly. snubbing The total length of rope needed for making a ___ hitch equals two barrel lengths, plus one circumference, plus four diameters. barrel Improved plow steel (IPS) has an average tensile strength of ___ pounds per square inch. 240,000 When wire rope has a natural finish, it is referred to as ___ finish. bright Any number of strands may be laid around a core; by far the greatest number of wire ropes made have ___ strands wound around a core. six The ___ classification usually has seven wires per strand and is referred to as coarse laid rope. 6 x 7 A rope is said to be ___ lay rope if the wires in the strands are wound in the same direction as the strands are wound around the core. lang The ___ construction strand has the same number of outer and inner wires. seale Wire rope is designated by the ___. diameter at its widest point ___ wraps of the seizing wire around a wire rope are recommended for seizing. 8 11 | P a g e Discard a fitting if the hook opening has increased by ___ percent from new. 10 Wear on any individual wire must not exceed ___ of the original wire diameter. one-third Multiple-part slings are referred to as ___ slings or spreaders and are made up of two, three, or four single-part slings placed on a master link bridle ___ is ideal for light loads such as small-diameter copper and steel tubing, or loads that will not exceed 400 to 500 pounds. fiber rope Slings made from ___ materials are probably the most widely used and also the most desirable. wire rope A ___ hitch reduces the lifting capacity of a sling by limiting the ability of the wire rope's components to adjust while under strain. choker ___ are made from a length of wire rope formed into a loop and spliced either mechanically or hand tucked. grommet slings It is always good practice never to use a sling when the legs form an angle less than ___° with the horizontal plane of the load. 45 ___ are actually small inverted slings at the ends of wire rope. sling eyes Eye splices equal ___ percent of the SWL of wire rope up to 3/4-inch diameter. 90 When a chain sling is hooked back on itself, it forms a choker, and the rating is reduced by ___. 1/4 When inspecting chain, if stretch exceeds ___ percent, replace the chain. 3 The surrounding area within ___ feet of a load must be cleared of debris to prevent the downwash air from helicopter rotors from scattering the debris. 12 | P a g e 100 The ___ shall be responsible for the size and weight of a load as well as the manner in which the load is connected to the helicopter. helicopter operator No unauthorized person shall be allowed to approach within ___ feet of a helicopter when the rotor blades are turning. 50 The lifting and landing of a load is controlled by standardized ___ signals. arm When hoisting with helicopters, give the ___ signal if any damage is noticed. emergency stop All helicopter hoisting operations must have at least ___ signaling systems. two All electrically operated ___ shall have an electrical activating device so designed and installed as to prevent inadvertent operation. cargo hooks Employees shall not perform work under hovering crafts except when necessary to ___. hook or unhook the load The weight of an external load attached to a helicopter shall not exceed the ___. equipment manufacturer's rating One safety practice to follow when hoisting loads with helicopters is to grasp only ___ to prevent fingers being crushed. the sides of the cables If the angle of tilt of a load is more than ___ degrees, the load should be rerigged. 5 Many localities require that, when operating a crane, the clearance around power lines may never be less than ___ feet. 10 Only the ___ is authorized to de-energize, insulate, or handle power lines. utility company 15 | P a g e pear shaped The basic weight of 1 square foot of steel that is 1 inch thick is about ___ pounds (lb). 40.83 A steel ___ is a structural shape consisting of a bent plate with some additional metal at the center for strength. angle The ___ of a circle (or the distance around the edge of a circle) is found by multiplying the diameter by π (3.1416). circumference The formula for calculating the ___ of a steel plate is length x width x thickness/height x density (of steel). weight To calculate the weight of materials other than steel plate, the calculation is normally based on the weight per ___. cubic foot When plates are rolled into tanks, the ___ of such parts needs to be determined before calculating the weight. square foot area If a steel angle is ___, the result is a plate. flattened out he most important step in any rigging operation is ___. determining the weight of the load to be hoisted Memorizing one basic weight and ___ formula(s) will give a journeyworker a reasonably accurate estimate of weight. two The area of a circle is equal to ___. π x r2 Oxygen bottles that are properly secured in a rack or stand designed for lifting/handling would be considered a critical rigging option. false There are three slings hanging from a hook. Each sling has the capacity of 2,000 pounds. What is the heaviest load that could be lifted using these slings if they were attached to a single point? 16 | P a g e 2,000 lbs The minimum depth of thread engagement for a 1/2 inch eyebolt into a steel object is: 3/4" Given a 1/2 in steel walled empty cylindrical tank that is opened at one end, calculate its weight (round answer to the nearest hundred). 1800 What markings are required on hoists? the manufacturer, model number, rated load, and re-inspection due date Which of the following markings are required on lashing? the reinspect due date, rated load A motor that weighs over 80 of the capacity of the rigging gear used in the rigging operation is considered a critical rigging operation is considered a critical rigging operation. false Increasing the sling angle from horizontal _______ the stress in the sling. decreases The area of this triangle with dimensions given in feet is: 24 sqft What is the minimum grade of chain required for chain slings? grade 80 Two people should be used to pull the hand chain of a manual chain hoist when it gets too hard for on person to pull. false Sling angle stress could contribute to an overload even if the slings selected had enough capacity to carry the total load weight. true Which of the following attachment points can be used at full capacity when pulled at any angle from vertical? swivel hoist rings To find sling angle stress... multiply the weight in the attachment point with the angle factor 17 | P a g e Who is required to perfom an inspection prior to using rigging gear, and what is this inspection called? the user, pre-use inspection Detailed written procedures are required for every rigging operation. false The rigging operating envelope contains the rigging gear and miscellaneous equipment covered by P- 307 section 14, the load itself and... the load rigging path, the gear or equipment's supporting structure When a load is left suspended unattended from a chain hoist it must be secured. How is the chain hoist secured the chain is tied off or pad locked What is the efficiency of a knot or bend? 75 Never bend a wire rope around a diameter _______ itself. smaller than To whom or to what are the majority of crane and rigging accidents attributed? personnel error What is the name of the knot or hitch shown below? (blue rope) clove hitch a straight-line hitch is good for _____ of a sling rated load? 100% What must be used to tighten a swivel hoist ring to the manufacturer's requirements? a torque wrench Attachment point #1 is 6 feet from the center of gravity (CG) and attachment point #2 is 3 feet from the center of gravity (CG). There is a 10,000 lbs load attached. What is the correct equation to find the weight distribution for attachment point #1? 3 divided by 9 multiplied by 10,000 (3 / 9 x 10,000) It is ok to tie a know in or install a bolt into a chain sling leg to shorten the sling. false When rigging gear covered by p-307 section 14 fails while suspended from a structure and drops the load it is a: 20 | P a g e false In general, you should never place the eye of the wire rope sling around an object that has a diameter greater than 1/2 Limit switches or chain stops must not be relied upon to stop the movement of the hoist during load movement. true The size of shackle that can be used in the eye of a wire rope sling must be ________ the wire rope size? equal to or greater than Calculate the tension in leg A 1,607 lbs You can hang a chain fall from staging to lift a load as long as it looks like it can handle the load being lifted. false A box has 27 cubic ft of sand in it. sand weighs 105 lbs per cubic ft. the box weighs 1,200 lbs empty. the correct equation to find the total weight is? 27x105=2,835+1,200= 4,035 lbs An angular pull of 45 degrees is allowed on non shouldered type eye bolts? false The volume of the cylinder is ______ cubic feet 9.42 When a sling is used in a choker configuration, its capacity is decreased what type of rigging operations would removing and replacing a highly sensitive electronic cabinet be considered? complex When a side-load is placed on a shackle, what is the shackle rated load reduced by? 50% What must you do if you have any doubts about the capacity of a padeye? contact the cognizant technical code or engineering for assistance 21 | P a g e Attachment points must be visually inspected? before and after each use what is the name of the knot pictured below? (red rope) square knot What should be used when attaching rigging gear to padeyes and lifting lugs? shackles With the proper D/d ratio a sling in a basket hitch can lift ___ of the rated load of the sling. 200%