Industrial Rigging Flashcards
What is the weight of a 36 foot American Standard I-beam designated S15 x 42.9? Use the equation W=w/ft x L
If a sling leg is attached to a suspended load at an angle less than 90 degrees, the horizontal force acting on the sling leg
Increases as the sling angle gets smaller
If 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
Which of the following hooks has a point designated to fit into a hole in the load?
Sorting hook
If the strands of a wire rope appear to spiral down to the right, and if the wires in the strands appear to be parallel to the rope axis, the wire rope is
right regular lay
A hook should be removed from service if
the tip is twisted from the unbent plane
If a wire rope is classified 6 x 37, the figure 37 means that
each strand of the rope contains a nominal 37 wires
Which of these wire-rope end fittings is the most efficient (assuming all are prepared correctly)?
speltered socket
The following factors all affect wire-rope strength. In which is the D/d ratio important?
Bending over a curved surface
If a rigger finds that a wire-rope sling is kinked, he should,
remove it from service
Which of the following identifications would be most likely to appear on the links of a chain suitable for overhead lifting?
800
The specification for welded-link chain that corresponds to a wire rope’s rated load is called the chain’s
working load limit
If an alloy steel chain sling has been subjected to temperatures over 1000 degrees F
it should be removed from service
There is a slot in one of the standard end fittings for metal mesh slings. It allows the sling to be used in a ____ hitch
Choker
You should recommend removing a metal mesh sling from service if
one welded joint at the edge of the sling is broken
The strongest and most popular of the synthetic-fiber ropes is
nylon
To avoid sharp bending and abrasion, the eye of a fiber rope sling should include a
thimble
A fiber-rope sling should be removed from service if it
shows kinking
The rated load, or capacity, of an encased polyester sling is indicated by the
color of the cover
You should remove a synthetic-web sling from service if
It is scorched
A pocketwheel is part of an
overhead manual chain hoist
The purpose of an upper limit switch is to
keep the load block from rising dangerously high
The difference between top-running and underhung cranes lies in
How the end trucks of the bridge beams are supported
When the rigger lifts a load a few inches, then stops to see if the load drifts downward, what is he checking?
Hoist brakes
Wire rope should be removed from hoist service if the rigger finds
two broken wires at a socketed end fitting
In a crane operation involving several people
the operator must respond to a stop signal from anyone
You should not use metal-mesh slings
If the spirals do not move freely
When working with floor-operated hoists and cranes, you should make sure that
obstructions can be cleared by the moving load
One edge of the load serves as a pivot during ____ turning
one-hook
When should blocks or other holding devices placed at the location where a load will be set?
before the load is lifted
The height of a movable sectional metal scaffold that measures 4x8 ft. at the base should not exceed _____ ft.
16
A hydraulic scissors lift of the larger type can safely support ____ workers and their equipment
2
Each worker on a suspended scaffold must wear a safety belt connected to a lifeline that is attached to
the structure being worked on
When you secure a scaffold with guy wires, what accessories do you use to tighten the wires to the correct tension?
turnbuckles
A wooden ladder must NOT be coated with
paint
