UA Rigging
Polypropylene rope is about ___ times stronger than manila rope.
1 3/4
When a chain sling is hooked back on itself, it forms a choker, and the rating is reduced by ___.
1/4
Discard a fitting if the hook opening has increased by ___ percent from new.
10
Many localities require that, when operating a crane, the clearance around power lines may never be less than ___ feet.
10
Even with a new rope, a splice, regardless of the type, reduces the load-carrying ability of the rope by ___ percent.
10 to 15
The strength of a socket is equal to ___ percent of the wire rope strength.
100
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.
100
Improved plow steel (IPS) has an average tensile strength of ___ pounds per square inch.
240,000
When inspecting chain, if stretch exceeds ___ percent, replace the chain.
3
When drifting loads using two or more chain hoists, the angle of lift should not exceed ___ degrees with the vertical.
30
The basic weight of 1 square foot of steel that is 1 inch thick is about ___ pounds (lb).
40.83
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
If the angle of tilt of a load is more than ___ degrees, the load should be rerigged.
5
No unauthorized person shall be allowed to approach within ___ feet of a helicopter when the rotor blades are turning.
50
A knot has only ___ percent of the strength of the rope.
50 to 60
The ___ classification usually has seven wires per strand and is referred to as coarse laid rope.
6 x 7
___ wraps of the seizing wire around a wire rope are recommended for seizing.
8
Eye splices equal ___ percent of the SWL of wire rope up to 3/4-inch diameter.
90
___ and OSHA require the use of approved crane and hoist signals.
ANSI
___ rope should be light in color with a silvery or pearl luster and a waxy surface.
Manila
___ rope is manufactured in "film" form rather than extruded filaments and then shredded into fine strips to form fibers.
Mylar
A steel ___ is a structural shape consisting of a bent plate with some additional metal at the center for strength.
angle
The lifting and landing of a load is controlled by standardized ___ signals.
arm
The total length of rope needed for making a ___ hitch equals two barrel lengths, plus one circumference, plus four diameters.
barrel
A ___ is formed by simply bending the rope and keeping the sides parallel.
bight
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
When wire rope has a natural finish, it is referred to as ___ finish.
bright
A ___ is sometimes called a come-along or a lugall.
cable winch hoist
All electrically operated ___ shall have an electrical activating device so designed and installed as to prevent inadvertent operation.
cargo hooks
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 reduces the lifting capacity of a sling by limiting the ability of the wire rope's components to adjust while under strain.
choker
___ hooks are designed to prevent the cutting and chafing of wire rope slings.
choker
The ___ of a circle (or the distance around the edge of a circle) is found by multiplying the diameter by π (3.1416).
circumference
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
___ must be used with all round pin shackles.
cotter pins
A(n) ___ is a piece of mechanical construction equipment used to move materials too heavy to be easily and safely moved by hand.
crane
The ___ is generally responsible for the safety of a crane operation as soon as the load is lifted clear of the ground.
crane operator
A(n) ___ knot is the first step in making a back splice.
crown
To calculate the weight of materials other than steel plate, the calculation is normally based on the weight per ___.
cubic foot
he most important step in any rigging operation is ___.
determining the weight of the load to be hoisted
Wire rope is designated by the ___.
diameter at its widest point
Shackles are sized by the ___.
diameter of the steel in the bow section
Sizes of rope used in the piping industry are designated as ___.
diameters
A ___ will not slip or draw tight under heavy loads.
double sheet bend
The diameter of a wire rope loop is a minimum of ___ times the rope diameter.
eight
When hoisting with helicopters, give the ___ signal if any damage is noticed.
emergency stop
The weight of an external load attached to a helicopter shall not exceed the ___.
equipment manufacturer's rating
It is recommended that all ___ used for hoisting be made of alloyed steel and equipped with shoulders.
eye bolts
___ 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
A(n) ___ knot is the best knot to use to keep the end of a rope or fall from running out of a tackle or pulley.
figure eight
To properly handle and care for rope, use at least a ___-to-one safety factor based on the minimum breaking strength of rope.
five
If a steel angle is ___, the result is a plate.
flattened out
___ are made from a length of wire rope formed into a loop and spliced either mechanically or hand tucked.
grommet slings
A ___ is primarily used to finish off other knots and should not be used by itself for lifting.
half hitch
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
A ___ distorts and crushes rope fibers, causing fatigue and rapid wear of the rope.
hockle
Employees shall not perform work under hovering crafts except when necessary to ___.
hook or unhook the load
All persons involved in a hoisting operation should be warned to ___.
keep clear of moving cables or ropes
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 ___ on a chain hoist is designed as the weakest part and will spread when overloaded.
lower hook
Wear on any individual wire must not exceed ___ of the original wire diameter.
one-third
___ links are the most popular because their shape puts the small part of the link on a hook
pear shaped
The ___ has the simplest construction and employs the basic lever-and-fulcrum principle.
ratchet jack
___ are the most versatile general purpose jacks and permit safe lifting, lowering, skidding, and leveling.
ratchet jacks
Most crane signals are made with the ___.
right hand
The ___ construction strand has the same number of outer and inner wires.
seale
A ___ should be used when connecting a hook to an eye.
shackle
___ are fittings that are used to connect other rigging hardware together, such as hooks to eyes or eyes to rings.
shackles
According to the number of ___, blocks are designated as single, double, or triple.
sheaves
If thimbles are loose in the eyes when inspecting a fiber rope, ___ the eyes to tighten the thimbles.
sieze
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
___ are actually small inverted slings at the ends of wire rope.
sling eyes
A ___ hitch is used to hold a load or to lower a heavy load slowly.
snubbing
The ___ chain hoist is the most efficient of all chain hoists.
spur gear
The ___ type of chain hoist is the one most frequently used in the piping trades.
spur gear
A(n) ___ knot is used for tying together two dry ropes of the same size and for tying the two ends of a rope together when used for backlashing.
square
When plates are rolled into tanks, the ___ of such parts needs to be determined before calculating the weight.
square foot area
If equipment contacts an overhead wire, the safest thing to do is to ___.
stay put
One safety practice to follow when hoisting loads with helicopters is to grasp only ___ to prevent fingers being crushed.
the sides of the cables
___ are installed in the eyes of wire ropes and give the eyes a definite shape while providing a wearing surface.
thimbles
There are ___ types of chain hoists used for lifting purposes
three
All helicopter hoisting operations must have at least ___ signaling systems.
two
It is common practice to make ___ whippings before cutting a rope and to cut between the whippings, eliminating the possibility of them unraveling.
two
Memorizing one basic weight and ___ formula(s) will give a journeyworker a reasonably accurate estimate of weight.
two
Only the ___ is authorized to de-energize, insulate, or handle power lines.
utility company
The formula for calculating the ___ of a steel plate is length x width x thickness/height x density (of steel).
weight
When a(n) ___ alarm is given or when leaving a crane overnight, ground chocks must be set on truck and crawler cranes.
wind
Slings made from ___ materials are probably the most widely used and also the most desirable.
wire rope
Jacking metal against metal is not permitted; use ___.
wood softeners
The area of a circle is equal to ___.
π x r2
