WLL ROPES
The type of rope that has the best insulting properties is dry...
Polypropylene
The portion of the rope that forms the loop is called the..
Bight
To prevent damage to the surface of a load, use a..
Synthetic web sling
A hoisting device designed to be used to pick up steel plate vertically is called a plate...
Clamp
The WLL of any sling indicates the load it lift as a...
Single vertical hitch
When loaded to the breaking point,nylon rope will stretch up to
40% of its original length
Which of the rope knot forms a non-slip loop?
Bowline
The minimum chain grade acceptable for overhead lifting is grade
8
Turnbuckles are used to adjust the length of slings so that loads can be hoisted...
In a level position
When calculating the WLL of bridle hitches with four legs,what formula should you use? Why?
WLL X Height X 2 Legs divided by the Length.
You can't assume that all legs share the load equally.
The working load limit for 13-mm (1/2-in)nylon rope with a breaking strength of 570kg used to lift materials is
114kg
The knot that multiplies the tension you apply to a rope is the
Single Dutchman
6 x 19 Ordinary. What do the numbers indicate?
6- indicates # of strands
19-indicates # of wires in each strand
DOUBLE
Correctly installed cable clips will reduce the breaking strength of wire rope by..
20%
Wire rope slings must not be made of...
Lang lay wire rope
If polypropylene rope has a working load limit for materials of 480 lbs, its breaking strength would be...
480x5 factor= 2400 lbs
To join a large-diameter rope to a small-diameter rope,you would use a
Sheet Bend
When would you choose chain instead of wire rope for hoisting?
When resistance to high temp. and abrasion is required.
Shoulder-type eye bolts are able to withstand pulls at an angle no greater than..
45 Degrees to the vertical
Hooks must be permanently removed from service if their throat openings have increased by...
15%
Sharp bends and knots can reduce the strength of rope by up to
50%
DOUBLE
For overhead lifting, you should use
A single-piece of rope
What are two poor rigging practices you must avoid when hoisting with chain?
Shock Loading,Twisting or Knotted
The number of cable clips required for a connection depends on the..
Diameter of the rope
Prior to breaking, a sling made of chain should be able to stretch no less than...
15%