Rigging, Hoisting, Signaling Flashcards
The distance from the cup of a hoist’s top hook to the cup of the hoist hook when it is at its upper limit of travel.
Headroom
A ___ is a socket that is compressed onto the end of a wire rope.
Swage Socket
Choker hitches put extra stress on a sling at the point of the choke, which reduces the slings rated load.
True
Multiple-leg chain slings are also known as ___ slings
bridle
The strength of a shain and shain attachments depend on the steel alloys from which they are made.
True
A ___ prevents the hoist from lifting a load that is over its rated capacity
Slip clutch
The Web sling safety factor indicates the fraction of total tensile strength that may be used for lifting load
True
___ Treatment can be used to develop the desired combination of strength and durability in a metal/
heat
The rules for Hoisting personnel are different from the rules for hoisting loads.
True
____ is the tension at which a material is expected to break.
Breaking Strength
Because of their inherit design, synthetic ropes and slings will not rot, mold, or mildew
False
Chain slings are fabricated in single-leg and multiple-leg configurations?
True
A sling must be immediately removed from service if the warning yarns are visible?
True
___ is the ratio of a components breaking strength to its rated load.
Safety Factor
-In general, a crane inspection consists of a ___ inspection.
hoist, platform, positioning component. (All of the above)
___ is the distance between a hoist hook’s upper and lower limits of travel.
Lift
Using the ___ procedure involves considering the load as a group of smaller sections, each with its open weight and CG.
Section CG(Center of Gravity)
What must be determined so that a load remains stable and level when lifted?
load’s center of gravity.
Written inspection record are required for hardware
False
To prevent its inadvertent use, damaged equipment must be properly ___ as suck until it can be destroyed or repaired.
Tagged
-Nonstandard hand signals are permitted only if the standard hand signal set is not practical
True
The Rated load of a web sling depends on the ___
Number of plies, webbing class, hitch type (All of the Above)
The rated load is the ___ that a rigging component may be subjected to while maintaining an appropriate margin of safety.
Maximum tension.
OSHA section 29 CFR 1910 and 29 CFR 1926 apply to general industry and construction respectively.
True
The Typical safety factor for web slings is ___?
5
___ Loads always tilt toward the center of gravity.
Unbalanced
Knots in web slings should be untied only if they have not yet been pulled tight under load.
True
A ___ is a category of knots that are used to tie the ends of two ropes together.
Bend
Dirt is particularly likely to get into the weave of synthetic rope and slings and may cause damage.
True
In a block-and-tackle assembly, the number of sheaves is assumed to equal the number of parts.
True
A rope with a break in an entire strand must be removed immediately.
True
If signs of damage are discovered that do not yet excess allowances, the equipment is ___ to remain in service
Permitted.
___ are used between the load and the rigging components.
Softeners
If a two-part reeve is used to lift a load 24 inches and the lead line must be pulled 48 inches this is a ratio of ___.
2:1
___ is the maximum tension that a crane or hoist may be subjected to while maintaining the appropriate margin of safety.
Rated Capacity
