| Question | Answer |
| Synthetic slings are constructed from yarns of man-made fibers, typically ____________________ fibers. | polymer |
| What is the force required to hold a 400-pound load using a three-part reeving system?
Note: The rope, block, and hook components weigh a total of 20 pounds. | 140lbs |
| The ________________ angle is the angle formed at the choke between the vertical part of the sling and the part of the sling surrounding the load. | choke |
| Lang lay ropes exopse more wires to the _________________ surface, which increases the _________________________ of the ropes. | 1. outer 2. useful life |
| Lang lay ropes are identified by their wires crossing the axis fo the rope at appropximately ________________ degrees. | 45 |
| Slip clutches are typically set at about 110% of the rated capacity of a hoist.
T/F | True |
| l × w × h | Volume of a Rectangular Solid |
| Nonstandard hand signals are never permitted during a lift.
T/F | False |
| Web slings are configured into ________________ standard configurations trypes. | 6 |
| Once a load’s CG is determined, it should be hoisted from directly over that point, which ensures balance.
T/F | True |
| Asymmetrical rigging means that the required sling lengths and angles are unequal.
T/F | bridle |
| A bundle of wires twisted spirally around and axis. | Strand |
| The ? is the maximum tension that a rigging component may be subjected to while maintaining an appropriate margin of safety. | rated load |
| A strand of metal wire or fiber that forms the center of a wire rope. | Core |
| Slings can be shortened by knotting or twisting. | False |
| _______________________ is the distance from the cup of a hoist's top hook to the cup of the hoist hook when it is at it's upper limit of
travel. This dimension specifies how much space must be allowed under the support for the hoist. | headroom |
| In most cases, a safety factor of five is used for fiber rope.
T/F | True |
| The ________________________ is a designation for the direction in which rope stands are twisted, described as if spiraling away FROM the observer. | Lay |
| A(n) ? inspection is a rigging equipment inspec tion performed at the beginning of each workday or shift by the user of the equipment or by another designated person. | frequent |
| Equipment that does not meet _____________________ inspection requirements may have a manufacturing defect, an improper label, or shipping damage. | initial |
| A power-operated hoist uses a ratchet-type mecha nism to lock a drive in place when not actively hoisting or lowering.
T/F | False |
| The ______________hitch is the simplest of all the hitch arrangements. One end of the sling is connected to a hoist hook and the other to a load. | Vetical |
| If a load is made from thick, solid parts, its volume is multiplied by the material’s ? in order to determine the load weight. | density |
| A round turn is typically finished with two half hitches, which form a _______________________ hitch. | clove |
| It is likely that replacement is often a more econom ical choice than repair for damaged equipment. T/F | True |
| Lifting a load from directly over its CG puts the least stress on the rigging and provides the safest and most controlled lifting conditions.
T/F | True |
| The most precise way to calculate the tension on a sling involves a load triangle. | True |
| Chain slings use a minimum safety factor of four.
T/F | True |
| Polyester webbing has _____________ markers. | blue |
| A ________________ is an overlap of webbing material that is sewn together. | splice |
| When using a shackle to form a choker hitch, it should be connected with the bow inside the sling eye. | False |
| The _______________ wire rope is the least susceptible to wear | Seale |
| Webbing is available in multiple widths and numbers of________________________ which determine its strength. | square knot |
| Rope should be overwound from left to right if the rope is anchored on the left and the rope is a left-lay rope.
T/F | False
Note: The rope should be overwound from left to right if the rope is anchored on the left and the rope is a RIGHT-LAY rope. |
| The primary advantage of synthetic slings is their resistance to abrasion and puncturing. | True |
| The ? procedure involves considering the load as a group of smaller sections, each with its own weight and CG. | Sections |
| A standing block is the upper block in a block-and-tackle configuration and is usually attached to a fixed object or structure.
T/F | True |
| A _________________ is a wheel with a concave edge for supporting a moving rope that is changing direction. | Sheave |
| Most basket hitch rigging requires only one basket. | False |
| __________________________ can be used to form, field-assembled bridle sling, particularly when all the sling eyes will not safely fit within the hoist hook. | Shackles |
| Hardware and attachments require gradual drying in fresh, circulating air before storage. T/F | False |
| ____________________ blocks are often equipped with lubrica tion fittings so the sheave bearings can be greased while in service. | crane |
| The most critical factor in rigging and lifting is density.
T/F | False |
| A lifting force is a constant force applied to an object that is only sufficient to keep the object in place. | False |
| The _____________ signal may be used to adjust the rigging or cribbing, reposition the suspended load, or correct some minor problem before the lift proceeds. | Dog Everything |
| Hook drift is the continued travel of a hoist hook caused by insufficient motor braking. | True |
| One-part reeving has a mechanical advantage of 2:1, reducing the lead-line force to only 50%.
T/F | False |
| Lang Lay ropes have greater __________________________ than regular-lay ropes but have a tendency to untwist under tension. | flexibility |
| The typical safety factor for web slings is 5.
T/F | True |
| A cat’s paw hitch is a compound knot that has the distinct feature of providing mechanical advantage when tightening.
T/F | False |
| Reach is the sum of the lift and the headroom
T/F | True |
| For symmetrical arrangements of four or more points, each point is considered to be supporting ? of the load weight. | 1/3 |
| ________________ is the distance between the cup of the top hook and the cup of the hoist hook when it is at it's lower limit of travel. | Reach |
| Synthetic web sling eyes must not be put around objects that are wider than one-fifth the length of the eye.
T/F | False
Answ no larger than 1/3 |
| A figure eight knot is also known as a ______________ Knot | Flemish |
| By using the ? procedure, the center of gravity of a relatively small load with a flat bottom can be determined by setting it onto a small roller and noting the tipping point. | Balance |
| A ? is the single turn of rope at the end of one drum wrap in which the rope winds over the previ ous wrap to begin a new wrap. | crossover |
| In a block-and-tackle assembly, the number of sheaves is assumed to equal the number of parts. | True |
| What are 4 types of sling hitches? | 1. Vertical hitch
2. Basket hitch
3. Choker hitch
4. Bridle hitch |
| A _________________ is a sprocket-like wheel with chain-link pockets. | Pocket wheel |
| A limit switch automatically deenergizes a hoist when the hoisting line reaches either end of its travel limit.
T/F | True |
| The bowline knot can be tied with the working end on either the inside or the outside of the loop, though the knot is stronger with the working end on the outside. T/F | False |
| A _________________ Block is used with natural or synthetic fiber ropes , primarily for manual hoisting operations. | Tackle |
| A Choker hook is used to quickly form a Choker ______________
on a wire rope without having to thread one end of the sling through the other end's eye. | hitch |
| Load weight may be indicated on equipment name plates, on shipping documents, or in the manufacturer’s product information.
T/F | TRUE |
| Load weight may be indicated on equipment name plates, on shipping documents, or in the manufacturer’s product information.
T/F | |
| What is the total weight of a bundle of 75 pieces of 20-foot-long, 1/2-inch trade size steel EMT conduit? | 450 lb
A 1/2 inch steel EMT conduit weighs 0.30 pound/foot. |
| A(n) ? is a method of tying together two ends of the same rope, such as when a rope is wrapped around an object and the two ends meet and are knotted together. | |
| A ________________________ is a sprocket-like wheel with chain-link pockets. | |
| What types of manila rope may be used for lifting applications | Yacht and umber 1 |
| A(n) ____________________ hoist is a power-operated hoist that uses an air motor to provide an input torque to a gear drive. | pneumatic |
| * _____________ is the combination of ropes and accessories used with blocks to gain advantage for lifting. In rigging applications the rope is known simply as "rope" or "line" | Tackle |
| Block loading is the total amount of static force experienced by a block while in a certain arrangement. | True |
| As more sheaves reduce the force required to lift a load, the distance the lead line must be pulled increases. | True |
| A sling must be immediately ___________________ from service if the warning yarns are visible. | Removed |
| The entire first layer of rope should never be unwound from a smooth drum.
T/F | True |
| 1/4πd2 × h | Volume of a Cylinder |
| Most lever-operated hoists use ratchets to transfer power and prevent reverse rotation. | True |
| A ? is a device that measures linear force by measuring the rotational force (torque) that it induces on the load cell’s sensor. | dynamometer |
| ________________ is the distance between a hoist hooks upper and lower limits of travel | Lift |
| The tension at which a material is expected to break. | Breaking strength |
| Three-part reeving involves two sheaves in an upper block and one in a lower block. | True |
| In a single-part reeving assembly, the lead-line force is equal to the load weight. | True |
| If a load has defined sections, the overall CG for the load can also be found by calculating the ? for each section. | Moment |
| The most common types of sling materials used for riggingand hoisting are 1._____________ , 2.___________________ and 3._____________. | 1.chain 2.synthetic round slings and 3. .wire rope. |
| The most common types of blocks used in industrial hoisting applications are crane blocks, wire rope blocks, snatch blocks, tackle blocks and gin blocks. T/F | True |
| A ________________ Rope Block is a block used with powered hoists where severe conditions of service are not expected. These blocks are relatively light and typically do not require weights to descend via gravity when being lowered. | Wire |
| ___________________ blocks are designed for slower speed opera tion and generally have plain bore or bronze bushing sheaves that must be disassembled for inspection and relubricatio | Tackle |
| Class 7 webbing has a minimum certified tensile strength of 6800 lb/in. of width per ply. | hand chain |
| 1/6πd3 | Volume of a Sphere |
| The minimum recommended sling angle is __________ . | 30° |
| A major advantage of a basket hitch is that it effectively ___________________________ the rated load of the sling as long as the legs of the sling remain withing 5 degrees of the vertical. | doubles |
| A(n) ________________________ inspection is a thorough rigging equipment inspection performed at regular intervals. | Periodic |
| ______________________rope consists of completely separate inner and outer braids, which may be of different materials. | .Double-braid |
| Audible signals can indicate an unlimited set of instructions, even those related to the most complex operation of a crane.
T/F | False |
| Torque is lateral force.
T/F | False
Torque is rotational force |
| When giving the _________ signal, the signalperson must watch the crane for two-blocking. | Extend Telescoping Boom |
| ______________________________ is the tendency of a knot under load to change form, often in an adverse way. | Capsizing |
| The typical safety factor for web slings is 5. | True |
| What is the total material weight of a load con sisting of 20 pieces of 4 foot x 10 foot steel sheets that are1/4 inch thick? | 8,160 lb
Note: A steel sheet at 1/4 inch thick weighs 10.2 pounds/foot. |
| A ________________________ is a continuous line of fibers twisted together. | yarn |
| The minimum recommended information on an inspection document includes the serial number, manufacturer, size, rated load, attachments, condi tion notations for each component, and T/F | True |
| A ? is an edge treatment on woven material that helps prevent unraveling | selvedge |
| The ____________________ is the portion of a rope that is unaltered or not involved in making a knot, hitch, or bend. | standing part |
| __________________ hitches are commonly used to attach slings to bundles of long materials, such as beam, tubing, and lumber. | Choker |
| The figure eight technique of coiling rope adds twists to the rope in opposite directions for each successive loop.
T/F | False |
| An advantage of a basket hitch is that it effectively doubles the rated load of the sling as long as the legs of the sling remain within 5° of vertical. | True |
| Identification tags will always include the ________________ hitch rated load. | vertical |
| Removed brake linings are inspected for deforma tion by laying a straightedge across the center and checking for gaps as the straightedge is rotated.
T/F | True |
| If a load is made from thick, solid parts, its volume is multiplied by the material’s ? in order to determine the load weight. | density |
| A size 5 roundsling is _____________________ in color. | Red |
| A ________________________ is a pressure point created when a rope crosses over itself after a turn around an object. | nip |
| What is a major advantage of a Basket Hitch? | A Basket Hitch effectively doubles the "rated load"of the sling (as long as the legs of the sling remain withing 5ft of the vertical. |
| A ___________________Block also known as a well wheel is a very simple block that is not much more than a large sheave in a lightweight frame. These block are used in hand-powered hoisting operations involving relatively light loads. | Gin |
| A ____________________ prevents the hoist from lifting a load that is over its rated capacity. | slip clutch |
| The bowline knot can be tied with the working end on either the inside or the outside of the loop, though the knot is stronger with the working end on the outside. t/F | True |
| Th most common strand patterns are 1._____________ 2.________________ 3_______________ and 4.___________________ | 1. filler wire 2. Warrington 3. Seale 4. Warrington Seale |
| Worm gear drives normally require braking or locking mechanisms to prevent reverse rotation.
T/F | |
| Most lever-operated hoists use ratchets to transfer power and prevent reverse rotation.
T/F | True |
| What is the minimum force required to lift a 5,000-pound load using an eight-part reeving system equipped with plain bearing sheaves?The bend ratio is 17. | Note: The bend ratio is 17. Therefore, the friction of each sheave adds an additional 7% of the load weight to the total, and the associated friction factor is 0.21.
Note: As of April 11, 2016, this question has been reworded.
The correct answer is: 1,050 lbs |
| Standard safety factors are valid for both steady loading and dynamic loading. T/F | False |
| In a right hand Regular lay rope, the strands are twisted to the ___________________ | Left |
| The tops of _____________________ slings are gathered at a common hook or fitting. | False |
| is the weaving of four pairs of alternately twisted strands into a rope. | Plaiting |
| A ? is an attachment point, usually on a block, for the dead end of a hoisting rope. | becket |
| The __________________________ is used for joining ropes of slightly different diameters | sheet bend |
| The CG is always closer to the lighter end.
T/F | False |
| 1/3πb2h | Volume of a Cone |
| A __________________________-lay rope is a rope in which the wires in the strands are twisted in the opposite direction of the lay of the strands. | Regular |
| When rope must be replaced, often the blocks must be replaced as well because the sheave grooves are no longer their original size. | True |
| A standing block is the upper block in a block-and-tackle configuration and is usually attached to a fixed object or structure.
T/F | True |
