Basic Rigging Flashcards
(35 cards)
If a sling leg is attached to a suspended load at an angle of less than 90”, the horizontal force acting on the sling leg
Increases as the sling angle gets smaller
both ends of a sling are attached to the hoist hook and a load is suspended from the center of the sling, what hitch is being used?
Basket
Determine the weight of a load consisting of 100 brass rods, 6 ft. long and 1.5 inches in diameter. (The weight per linear foot is 6.51 lb.)
3906 LB
If a rope has a breaking strength of 25,000 Lb and the design factor of the sling is 5, what is the maximum allowable load they can lift?
5000 lb
The purpose of the latch on a hoist hook is to
Retain the sling
The following factors all affect wire-rope strength. In which one is the Did ratio important?
Bending over a curved surface
Which of these wire-rope end fittings is the most efficient (assuming all are prepared correctly)?
Speitered socket|
The letters FC, as part of a wire rope designation, stand for
Fiber core
Which of the following is used to protect a rope loop from abrasion and sharp bends?
Thimble
The length of wire rope between loops or end fittings of braided wire-rope slings should be a minimum of
_______times the diameter of the component wire rope.
10
The specification for welded-link chain that corresponds to a wire rope’s rated load is called the chain’s
Working Load limit
Chain slings should be visually inspected_____ before and while using them.
daily
Heavy-duty metal mesh is designated as______ gauge
10
An advantage of metal mesh slings is that they
conform to irregutarty shaped loads
The standard minimum design factor for metal-mesh slings
5
fiber-rope sling should be removed from service if it
Shows kinking
The highest grade of manila rope is known as
yacht rope
Bending a load-bearing rope at a sharp angle can_____ its strength by as much as____%
decrease, 50
A splice of any type in a fiber rope reduces its strength by about____%
10
Synthetic webbing is spliced by
Stitching
Wire rope should be removed from hoist service if the rigger finds
Two broken wires at a socketed end titing
Overwrapping can throw a hoist’s stopping point out of adjustment if a____ limit switch is used.
geared
A top-running crane with a bridge beam supported on legs is called a____crane
gantry
When conducting daily hoist and crane inspections, check limit switches with______and at____speed
no load; low
