Rigging Test Questions
1000 Ibs.
A four-point hook up is being used to lift 4000 Ibs. using a spreader bar such that the legs are vertical with exact same length slings. With each leg carrying an equal load, what is the stress on each sling?
3080 Ibs.
A three-point hook up is being used to lift 800 Lbs. using a spreader bar such that the legs are at 30-degrees off vertical. With each leg carrying an equal load, what is the stress on each sling?
adjust sling length
A turnbuckle is used to:
jaw and weldless eye
A turnbuckle to be used in hoisting or rigging operations should be of what type construction?
notify the crane who the signal is for
For each signal, prior to giving the function/direction, the signal person must:
1/2"
Given the attached drawing, determine the minimum thread engagement for the 3/8" eyebolt per the attached load
cracks and point twist
Hook inspections shall include:
as many as are required per the lift plan
How many persons may share a dedicated channel for the purpose of coordinating operations?
increase in load
If the center of gravity (cg) shifts during the lifting of an equally balanced (2) pick load, the pick point nearest the cg will:
be removed from service
Knots tied in synthetic web slings or wire rope slings reduce the SWL (safe work limit) by approximately 50% and therefore should:
quadrants of operation
Most load carts will include a small drawing of the crane showing the shape and location of the machine's:
wire rope clips
Never saddle a dead horse is a phrase that refers to:
194(90)
Per ASME Standard, fiber core wire rope slings of all grades shall not be exposed to temperatures in excess of what degree F (degree C)?
194 (90)
Per ASME standard nylon and polyester slings shall NOT be used in contact with temperatures in excess of what degrees F (degree C)?
diameter of steel in the bow section
Shackles with screw pins are sized by the:
D/d ratio
The term that applies to the size of a block sheave relative to the size of the rope running through it is:
signal person, operator, lift director
When non-standard signals are used, the following people must contact each other prior to the lift operation and agree upon the non-standard signals which are going to be used:
bowline in a bight
a knot that is used to form a loop at any point in the rope between its ends is called a:
put an angular pull on an eyebolt
a shoulder type eyebolt must be used when you need to:
operator
a signal person must be provided when the point of operation, meaning the load travel or the area near or at load placement is not in full view of the:
shock loading
an air tugger is lowering a load. A kink in the cable allows the rate of drop for a second, then pulls the slack through the snatch block, allowing the load to drop a short distance. The resulting condition from this maneuver is known as:
hoist
any overhead crane consists of three basic units; the bridge, trolley, and:
radius
as a crane starts to tip, the load _________ begins to increase. This increases the load's leverage on the crane and the tipping force
safely landed and properly blocked
before loads are unhooked, all loads must be:
crawler
carrier-mounted lattice boom cranes are also commonly referred to as __________ cranes.
angle
critical lifts are those where the load weight is close to the rated capacity of the crane. When the lifting load weighs more than 75% of the rated capacity, or when lifts involve two or more cranes, be sure to check the boom:
site conditions preclude the use of hand, voice, or audio systems
en an a new signal system be used?
identify the load path
four essential elements in a rigging pre-job inspection: 1. Reference documents for specific manufacture information including the weight, plant requirements and safety procedures. 2. Examine the load for structural stability, center of gravity, and attachment point. 3. List, collect, and inspect the equipment and material needed. 4. _____________________
front
high wind speed acting on the __________ of the boom can cause it to topple backward if it is at a high boom angle
Buckle in the middle
if a two-leg sling attachment is used to lift a long load of flexible material, the load may:
stop the job, get clarification, and a procedure change
if the equipment you are working on has a written procedure for performing a lift and you find it differs from the manufacturer's specifications for lifting, you should:
200% SWL
in a basket hitch the capacity of the sling will be:
360
in addition to using flags and barricades to show the work zone near power lines, the employer can define the work zone area ________ degrees around the equipment up to the equipment's maximum working radius
low
industrial cranes have _____________ centers of gravity to permit operation in narrow aisles or runways without outriggers
significantly reduce the strength of synthetic rope slings
knots shall not be used to configure synthetic rope slings because knots:
you know what the load will do in terms of movement when it is picked up
one of the steps in a rigging planning session is to determine the stability of the load based upon the rigging attachment points associated with its center of gravity. Why is this an important planning step?
vendor technical manual
rigging specifications for a specific piece of equipment may be found in"
center of gravity
rotation of the upper works changes the location of the crane's:
tower
some manufactures of carrier-mounted lattice boom cranes offer optional _________ attachments for their machines
total area that the boom can swing over
the "Sweep area" refers to the:
bridge
the ___________ is the main structural member of an over head crane used to span the width of the runway area
double sheet bend
the ________________ is used to join two wet ropes:
turnbuckle
the attached drawing illustrates a device for adjustment of load and is termed a:
load hook
the crane is said to be in a particular quadrant of operation when the ______________ is located over that area
two
the factor in the "Rule of Thumb" formula for safe work limit of a three-leg bridle hitch is:
stops
the leverage the crane exerts on the load changes as it:
8
the maximum number of parts of line that may be used when reeving fiber rope before friction loss is greater than mechanical advantage is:
underestimating load weight
the single greatest cause for fatalities in crane accident is:
blocks installed at contact points
to ensure that correct sling angles are maintained during choker hitch use, the sling may have:
after each use
turnbuckles should be inspected:
block
two-blocking occurs when the ___________ or headache ball makes contact with the sheaves at the boom tip
safety latch
what feature should hooks have to retain slings and lifting attachments?
two half hitches
what is the best hitch to use for lifting a small bore pipe vertically?
distribute the load of a lift across more than one point
what is the main purpose of a spreader bar?
weight and physical properties of the load
what is the most significant information a rigger will need when setting up cribbing for a load?
spreader bar
what is used to prevent the load from being crushed by the squeezing action of the slings upon lifting?
the new signal system is at least equally effective communication as the standard system being replaced
what must be demonstrated prior to the use of a new signal system?
unsecured load and loose chains
what potential hazard is associated with lifting/moving a load secured with hand chain hoist/lever hoist?
Remove the capacity tag
what should be done with slings when they are "taken out of service"?
double wrap choker hitch
what type of hitch produces a 360-degree contact with the load and tightens as the lift takes place?
clear off the ground
when a carrier-mounted crane is on outriggers, full chart ratings apply only when all tires are:
is reduced
when a wire rope is bent around an object whose diameter is equal to the diameter of the wire rope load capacity of the wire rope:
load capacity of the floor for the landing area
when evaluating a load landing area inside a building for cribbing, what would be a primary concern?
clearances available around equipment
when evaluating a load path, it is necessary to know the:
when the center of gravity of the load is offset to one side of the road
when is a lifting beam used?
find the center of gravity
when lifting an object that is of irregular shape, you must always:
three
when making a vertical lift using a four-point hookup, how many sling legs are assumed to be supporting the load?
lowered
when performing a load inversion, under ideal conditions, the heavy end of the load should be:
wind an overwound drum from the opposite top side of the spool
when spooling wire rope onto a tugger, what is the correct procedure?
dedicated spotter
when the equipment is travelling and the view in the direction of travel is obstructed, a ____________ must be provided
effective, clear, and reliable
when using electronic transmission devices, the transmitted signal must be:
100%
whenever anything is lifted or raised from a horizontal position to a vertical position, the crane load will be equal to _________ the weight of the object until the object is vertical and clears the ground
below the attachment points
where would the CG of a load be located during a lift?
air bearings
which friction reducing tool has the least amount of friction?
caterpillar dollies
which friction reducing tool is constructed using a series of rollers attached to a chain on each side?
proximity alarms
which of the following are set to give the operator sufficient warning to prevent encroachment of power lines?
distance, function, direction
which of the following are the three required elements of a voice signal?
lift load and determine stress/strain on slings
which of the following is UNACCEPTABLE for determining load weight?
vendor technical manual
which reference should be the final authority in determining rigging specifications on a piece of equipment?
shackles with damaged threads should not be used
while inspecting shackles prior to use, any:
the operator, signal person, and lift director
who determines if a new signal system is suitable?
the operator and signal person
who is allowed to design a new signal system?
to prevent the slings from crushing the load
why is a spreader bar used in a rigging operation?
