A ? hook is a sliding hook used to form a choker sling when hooked to a sling eye.

Rigging is the planned movement of material and equipment, using slings, hoists and other rigging equipment. Use the Flashcards to assist you in completing the Trade Terms Quiz. Use the Testing format to review for module exam. (un-check the "written" format when resetting test configuration)

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How do you choke a sling?
When using a shackle to form a choker hitch it should be connected with the bow inside the sling eye?
Which type of hook should be used when using a steel chain sling?
When any sling is used in a choker configuration Its capacity is?

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Question	Answer
When giving the _________ signal, the signalperson must watch the crane for two-blocking.	Extend Telescoping Boom
Nonstandard hand signals are never permitted during a lift. T/F	False
Audible signals can indicate an unlimited set of instructions, even those related to the most complex operation of a crane. T/F	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
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.
Load weight may be indicated on equipment nameplates, on shipping documents, or in the manufacturer’s product information. 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
The most critical factor in rigging and lifting is density. T/F	False
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.
What is the total material weight of a load consisting 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.
Load weight may be indicated on equipment nameplates, on shipping documents, or in the manufacturer’s product information. 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
1/6πd3	Volume of a Sphere
l × w × h	Volume of a Rectangular Solid
1/4πd2 × h	Volume of a Cylinder
1/3πb2h	Volume of a Cone
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
A ? is a device that measures linear force by measuring the rotational force (torque) that it induces on the load cell’s sensor.	dynamometer
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
The CG is always closer to the lighter end. T/F	False
The ? procedure involves considering the load as a group of smaller sections, each with its own weight and CG.	Sections
If a load has defined sections, the overall CG for the load can also be found by calculating the ? for each section.	Moment
Once a load’s CG is determined, it should be hoisted from directly over that point, which ensures balance. T/F	True
For symmetrical arrangements of four or more points, each point is considered to be supporting ? of the load weight.	1/3
Asymmetrical rigging means that the required sling lengths and angles are unequal. T/F	True
What are 4 types of sling hitches?	1. Vertical hitch 2. Basket hitch 3. Choker hitch 4. Bridle hitch
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 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
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
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
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
__________________ hitches are commonly used to attach slings to bundles of long materials, such as beam, tubing, and lumber.	Choker
__________________________ can be used to form, field-assembled bridle sling, particularly when all the sling eyes will not safely fit within the hoist hook.	Shackles
The ? is the maximum tension that a rigging component may be subjected to while maintaining an appropriate margin of safety.	rated load
The tension at which a material is expected to break.	Breaking strength
Chain slings use a minimum safety factor of four. T/F	True
Standard safety factors are valid for both steady loading and dynamic loading. T/F	False
Slings can be shortened by knotting or twisting.	False
Identification tags will always include the ________________ hitch rated load.	vertical
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
Most basket hitch rigging requires only one basket.	False
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
When using a shackle to form a choker hitch, it should be connected with the bow inside the sling eye.	False
The tops of _____________________ slings are gathered at a common hook or fitting.	bridle
The minimum recommended sling angle is __________ .	30°
The most precise way to calculate the tension on a sling involves a load triangle.	True
Equipment that does not meet _____________________ inspection requirements may have a manufacturing defect, an improper label, or shipping damage.	initial
A(n) ________________________ inspection is a thorough rigging equipment inspection performed at regular intervals.	Periodic
A(n) ? inspection is a rigging equipment inspection performed at the beginning of each workday or shift by the user of the equipment or by another designated person.	frequent
It is likely that replacement is often a more economical choice than repair for damaged equipment. T/F	True
The minimum recommended information on an inspection document includes the serial number, manufacturer, size, rated load, attachments, condition notations for each component, and T/F	True
Hardware and attachments require gradual drying in fresh, circulating air before storage. T/F	False
The figure eight technique of coiling rope adds twists to the rope in opposite directions for each successive loop. T/F	False
A bundle of wires twisted spirally around and axis.	Strand
A strand of metal wire or fiber that forms the center of a wire rope.	Core
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
In a right hand Regular lay rope, the strands are twisted to the ___________________	Left
The ________________________ is a designation for the direction in which rope stands are twisted, described as if spiraling away FROM the observer.	Lay
Lang lay ropes are identified by their wires crossing the axis fo the rope at appropximately ________________ degrees.	45
Lang lay ropes exopse more wires to the _________________ surface, which increases the _________________________ of the ropes.	1. outer 2. useful life
Lang Lay ropes have greater __________________________ than regular-lay ropes but have a tendency to untwist under tension.	flexibility
Th most common strand patterns are 1._____________ 2.________________ 3_______________ and 4.___________________	1. filler wire 2. Warrington 3. Seale 4. Warrington Seale
A sling must be immediately ___________________ from service if the warning yarns are visible.	Removed
Web slings are configured into ________________ standard configurations trypes.	6
Synthetic slings are constructed from yarns of man-made fibers, typically ____________________ fibers.	polymer
The primary advantage of synthetic slings is their resistance to abrasion and puncturing.
Polyester webbing has _____________ markers.	blue
Webbing is available in multiple widths and numbers of________________________ which determine its strength.
Class 7 webbing has a minimum certified tensile strength of 6800 lb/in. of width per ply.
The typical safety factor for web slings is 5.	True
A ? is an edge treatment on woven material that helps prevent unraveling	selvedge
The typical safety factor for web slings is 5. T/F	True
A ________________ is an overlap of webbing material that is sewn together.	splice
A size 5 roundsling is _____________________ in color.	Red
The _______________ wire rope is the least susceptible to wear	Seale
What types of manila rope may be used for lifting applications	Yacht and umber 1
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
A ________________________ is a continuous line of fibers twisted together.	yarn
______________________rope consists of completely separate inner and outer braids, which may be of different materials.	.Double-braid
is the weaving of four pairs of alternately twisted strands into a rope.	Plaiting
In most cases, a safety factor of five is used for fiber rope. T/F	True
______________________________ is the tendency of a knot under load to change form, often in an adverse way.	Capsizing
A ________________________ is a pressure point created when a rope crosses over itself after a turn around an object.	nip
The ____________________ is the portion of a rope that is unaltered or not involved in making a knot, hitch, or bend.	standing part
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.	square knot
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 figure eight knot is also known as a ______________ Knot	Flemish
The __________________________ is used for joining ropes of slightly different diameters	sheet bend
A round turn is typically finished with two half hitches, which form a _______________________ hitch.	clove
A cat’s paw hitch is a compound knot that has the distinct feature of providing mechanical advantage when tightening. T/F	False
A _________________ is a wheel with a concave edge for supporting a moving rope that is changing direction.	Sheave
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
____________________ blocks are often equipped with lubrication fittings so the sheave bearings can be greased while in service.	crane
___________________ blocks are designed for slower speed operation and generally have plain bore or bronze bushing sheaves that must be disassembled for inspection and relubricatio	Tackle
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
A _________________ Block is used with natural or synthetic fiber ropes , primarily for manual hoisting operations.	Tackle
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
* _____________ 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
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 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 an attachment point, usually on a block, for the dead end of a hoisting rope.	becket
One-part reeving has a mechanical advantage of 2:1, reducing the lead-line force to only 50%. T/F	False
Three-part reeving involves two sheaves in an upper block and one in a lower block.	True
A lifting force is a constant force applied to an object that is only sufficient to keep the object in place.	False
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
In a block-and-tackle assembly, the number of sheaves is assumed to equal the number of parts.	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
As more sheaves reduce the force required to lift a load, the distance the lead line must be pulled increases.	True
Block loading is the total amount of static force experienced by a block while in a certain arrangement.	True
In a single-part reeving assembly, the lead-line force is equal to the load weight.	True
When rope must be replaced, often the blocks must be replaced as well because the sheave grooves are no longer their original size.	True
________________ is the distance between a hoist hooks upper and lower limits of travel	Lift
_______________________ 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
________________ 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
Reach is the sum of the lift and the headroom T/F	True
Torque is lateral force. T/F	False Torque is rotational force
A ________________________ is a sprocket-like wheel with chain-link pockets.	hand chain
Most lever-operated hoists use ratchets to transfer power and prevent reverse rotation.
Most lever-operated hoists use ratchets to transfer power and prevent reverse rotation. T/F	True
A(n) ____________________ hoist is a power-operated hoist that uses an air motor to provide an input torque to a gear drive.	pneumatic
The entire first layer of rope should never be unwound from a smooth drum. T/F	True
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.
Worm gear drives normally require braking or locking mechanisms to prevent reverse rotation. T/F	False
A _________________ is a sprocket-like wheel with chain-link pockets.	Pocket wheel
A ? is the single turn of rope at the end of one drum wrap in which the rope winds over the previous wrap to begin a new wrap.	crossover
A ____________________ prevents the hoist from lifting a load that is over its rated capacity.	slip clutch
A limit switch automatically deenergizes a hoist when the hoisting line reaches either end of its travel limit. T/F	True
A power-operated hoist uses a ratchet-type mechanism to lock a drive in place when not actively hoisting or lowering. T/F	False
Slip clutches are typically set at about 110% of the rated capacity of a hoist. T/F	True
Hook drift is the continued travel of a hoist hook caused by insufficient motor braking.	True
Removed brake linings are inspected for deformation by laying a straightedge across the center and checking for gaps as the straightedge is rotated. T/F	True

How do you choke a sling?

A sling rigged in a choker hitch (not double wrapped) does not make full contact with the load. Use multiple slings to balance the load, and wrap the load to ensure full contact. Ensure multiple slings do not cross. Choke on opposite sides of the load, if this action will not damage the load and maintain load control.

When using a shackle to form a choker hitch it should be connected with the bow inside the sling eye?

Signaling Test.

Which type of hook should be used when using a steel chain sling?

Our specialists have found that most of the time, alloy steel chain slings have a standard hook with a metal clasp latch on one end that you can attach to points on a load. Additionally, you could utilize a grab hook.

When any sling is used in a choker configuration Its capacity is?

A CHOKER HITCH HAS 75% OF THE CAPACITY OF A SINGLE LEG SLING ONLY IF THE ANGLE OF CHOKE IS 120 DEGREES OR GREATER. A CHOKE ANGLE LESS THAN 120 DEGREES CAN RESULT IN A CAPACITY AS LOW AS 40% OF THE SINGLE LEG.

A ? hook is a sliding hook used to form a choker sling when hooked to a sling eye. How do you choke a sling?