ANSWERS TO RIGGING QUIZ No. 23
|
1.
When using a Choker
hitch, 20 to 25 percent of single leg capacity is lost. 2.
The most basic hitch is the single leg or vertical hitch. 3.
A basket
hitch can have twice the
capacity of a single leg. 4.
When a shackle is used to help form a choker hitch; the pin of the
shackle must be placed into the eye if the sling . 5.
A double wrap choker or basket hitch has excellent grip on a
load because the contact is greater than 360 degrees
. 6.
Never use a double basket hitch (single wrap) at a horizontal
sling angle of less than 60 degrees_. 7.
Never use a double choker
(double wrap) at a horizontal sling angle of less than 45 degrees . 8.
A single leg sling will often provide poor load control . 9.
A three legged sling will often provide improved load control, but
the capacity of the sling depends on how each leg shares the
load . 10.
It is possible for only two legs of a
four-legged bridle to carry the full load at times. 11.
A single basket hitch (single wrap) has poor grip on the load
because it has less than 360
degrees contact with the load. 12.
Place block of wood under the eye of a choker hitch to avoid “beating down the eye”
and to increase the grip on the load. 13.
Three legs of a
three-legged bridle will carry the load if the lengths are close to the same
length. 14.
When using synthetic slings, snug the choker before lifting and
slowly take up slack to avoid
friction melting . 15.
A wire rope sling used in an inverted basket hitch over a hook can
lose 50 % of its capacity. 16.
The sling connected closest
to the center of gravity
will carry the greatest share of the load. |
Answers A.
Choker B.
Basket C.
vertical D.
load control E.
greater than 360 degrees F.
two G.
synthetic sling H.
three I.
eye of sling J.
shares the load K.
four L.
60 degrees M.
45 degrees N.
50 percent O.
block of wood P.
center of gravity Q.
closest R.
90 degrees S.
friction melting T.
less than 360 degrees U.
100 percent |
From: “The Crosby group product
application seminar workbook on hitches”