Basic 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
153.3 LB.
540.0 Lb
1544.4 LB
2145.5 Lb
1544.4 LB
If both ends of a sling are attached to the hoist hook and the load is suspended by the center of the sling, what hitch is being used?
Basket
Choker
Double Basket
Double choker 
Basket
They hook should be removed from service If
The hook is discolored
The hook shows some scratches
The tip is bent or twisted
Wear has reduced the thickness by 2%
The tip is bent or twisted
Determine the weight of a load consisting of 100 brass rods, 6ft long and 1.5inches in diameter (the weight per linear foot is 6.51Lb)
651 lb
3906 lb
5859 lb
7890 lb
3906lb
The point at which a load will balance is called
Apex
Center of gravity
Point of suspension
Stability point
Center of gravity 
If the strands of a wire rope appear to spiral down to the right, and if the wire strands appear to be parallel to the rope axis, the wire rope is
Left Lang Lay
Left regular lay
Right Lang Lay
Right regular lay
Right regular lay
If a wire rope is classified as 6×37, the figure 37 means
Each strand of the rope contains a nominal 37 wires
The length of the rope is 37 rope lays
The rope is 37 feet long
There are a normal 37 strands in a rope
Each strand of the rope contains a nominal 37 wires
Which of these wire rope and fittings are most efficient (assuming all are prepared correctly)?
Hand-tucked thimble slice
Speltered socket
Wedge socket
Wire-rope clips
Speltered socket
As a general rule, what are the minimum and maximum temperatures to which a wire rope sling may be exposed, and still maintain its strength
-20/ +200•F (-29/93•C)
-40/+300•F (-40/149•C)
-60/+400•F (-51/204•C)
-80/+600•F ( -62/316•C)
-60/+400•F
Which of the following is used to protect a rope loop from abrasion and sharp bends ?
Clip
Fist
Thimble
Wedge 
Thimble
The process of joining two sections of rope by weaving the strands together is called
Seizing
Serving
Splicing
Swaging 
Splicing 
Which of the following hedges cannot be made with a basic single leg sling
Basket
Bridle
Choker
Vertical 
Bridle
The proof test value of a chain is at least _____ times the working load limit
Two
Three
Four
Five
Two
The standard minimum design factor for metal mesh slings is
3
5
7
9
5
A fiber rope. Sling should be removed from service if it.
Becomes wet
Has been frozen and thawed
Shows kinking
Shows oil discoloration
Shows kinking
Nylon and polyester rope slings have a design factor of
5
7
9
11
9
Before cutting a fiber rope, the ends should be________ to prevent fraying
Entwined
Spliced
Twisted
Whipped
Whipped 
Synthetic webbing is spliced by
Cementing
Heat treating
Interweaving
Stitching
Stitching
The purpose of an upper limit switch is to
Cut power if a load weighs more than
Keep the load block from rising dangerously high
raise the load block when the hoist is not in use
Stop lifts at a height convenient for a job
Keep the load block from rising dangerously high 
When a rigger lifts a load, a few inches, then stops to see if the load drift downward, what is he checking?
Gearbox
Hoist breaks,
Lower limit switch
Overload 
Hoist breaks
A pneumatic hoist is typically used instead of an electric one, when
An electric spark could be dangerous
Coast is a factor
Lifting speed is important
The load is greater than an electric motor can handle
An electric spark could be dangerous
With a double reeved hoist
The load hook travels sideways as loads are raised
The rope unwinds from one side of the drum to the other
True vertical lift is possible
Two hoist drums are involved 
True vertical lift is possible
A top running crane with a bridge beams supported on legs is called a________ crane
Cantilevered
Gantry
Girder
Jib
Gantry
Hoist load chain, and sling chain
Are made of the same materials
Are subject to the same types of wear
Look similar
Receive the same heat treatment
Look similar 
One edge of the load serves as a pivot during_______ turning
Double sling
One hook
Single sling
Two hook
One hook
When should blocks or other holding devices be placed at the location where a load will be set?
Before the load is lifted
As soon as the load is lifted
While the load is being moved
While the load is suspended at the desired location
Before the load is lifted 
A lift in excess of rated capacity
Can be made repeatedly once approved
Does not require analysis by a qualified person
Is never permitted
May be authorized for a single lift
May be authorized for a single lift 
In general, you should not use a hoist or crane to pull a load, but it is permissible if you
Attach a pulley block to the load
Swing the boom of the crane to do the polling
Use a manual chain, hoist in a horizontal set up
Use rollers under the load
Use a manual chain, hoist in a horizontal set up 
As a generic rule, you should set a load on
A concrete floor for stability
Any surface as long as it doesn’t damage the load
The sling that holds it, then tug it sharply away
Wooden blocks to allow easy sling withdrawal
Wooden blocks to allow easy sling withdrawal 
Two hook turning of a suspended load
Is accomplished with a single hoist
Is the easiest turning method to use?
Requires a minimum amount of planning
Should be used only when absolutely necessary
Should be used only when absolutely necessary 
Selection of the proper sling material for a job is determined primarily by
Environmental conditions
Hitch arrangement
Method of attachment to the load
The shape of the load
Environmental conditions
When you secure a scaffold with Guy wires, what accessories do you use to tighten the wires to the correct tension?
Cable clamps
Thimbles
Tumbuckles
Wire rope clips
Tumbuckles
Unless otherwise specified, the maximum load that can safely be supported on a sectional metal scaffold is_______lb/ft2 pf work area
10
25
40
50
25
When using a screw jack to level a double pole scaffold, make sure
The jacks base can support the weight without sinking
The weight of the scaffold remains centered over the jack after leveling
To replace the jack with round Timbers after leveling
To work in the center of the scaffold, to avoid toppling the jack
The Jack’s base can support the weight without sinking 
When is ascending a ladder, make sure to
Keep your back to the ladder
Leave one hand free to carry tools
Step carefully off the top rung
Use a rope to raise needed materials
Use a rope to raise needed materials 
