Hoisting and rigging Flashcards
what the maximum wear for a chain under 1 inch? over 1 inch?
5%/ 10%
A socket commonly used with cable to secure elevators cable name is ?
Drop forged socket
Wedge sockes are commonly used as a cable attachment on mobile cranes?
True
compressing a steal sleeve over a rope to form a connecting point is called a?
Swedge pocket
in order to retain a wire rope shape, a millwright will use to retain the shape?
thimble
Never saddle a dead horse?
True always saddle the live end never the dead end
Closing the opening of a hook with mechanical wire is known as?
mousing
Three basic types of shackles available?
Screw pin, round pin, and safety tight
The working load for slings is calculated for?
a single verticle hitch
In order to equalize the load on long slings in a big lift?
Equalizer beam is used
Single length of sling hooked back on its self is called a?
Single Choker
When lifting loads when sensitive to scratching or marring?
Synthetic web sling
A rule of thumb for calculating a sling with a 3/8 wire rope will support ?
1 ton
a block that can be opened on one side and permit the rope to be slid over onto the shiv is called a ?
snatch block
All chain hoists are designed with the hook as their weakest part?
True
It is ok to inter change the hooks on a chain hoist?
False
complete list of hand signals is listed in appendix D of the wcb regulations?
True
Most rigging assecories are produced by?
forging
the reason a hoisting rope the upper block should lead from the center of the shiv is?
to keep the block from tipping
two arms out is stop signal
what fist over head?
main hoist up
how is chain size determined
thickness diameter of the link
What does “A” mean on a chain?
lifting chain
turn buckles when used for rigging and hoisting?
should be tied with tie wire
premature wire rope on a crane with be caused by?
excessive fleet angle
disadvantages of this rope can not be used with swivels or the ends on fastened?
lang lay
when the crane operator and signal man can not see eachother?
use two way radios
when slinging a bundle of pipe or tubing which of the following with provide best contact of the load?
double wrapped choker
what happens to rigging hardware when shock loading occurs?
increased load stress
correctly installed u bolt type of clips are installed on what portion?
saddle end goes on live end and u bolt side goes on dead end
in the construction of wire rope the small diameter wire is wrapped around the wire to create a ?
Strand
more wires in a strand the more?
flexible a rope will be
the breaking strength of a rope is?
the force needed to break the rope
the letters FC in a sling code refer to?
the core of the rope
wire rope which the strands and the wires are twisted in the same direction?
lang lay
6x31 morigtion seal iwrc right regular lay
6 strands of 31 wires in a strand
the IWRC stand for
independant wire rope core
properly measure the diameter of a rope?
from the widest point
any damaged or kinked sections should be?
discarded
Wire rope should be lubricated according to?
Manufactured spec
fibre ropes are divided into two groups
synthetic and natural
poletherin rope is a natural fibre rope?
false
When two three or more sling legs are used is called?
Bridle hitch
A proper fitting shiv groove should support the rope fit the circumference is?
135-150
fibers rope are divided into two groups
synthetic and natural
