Exam (elaborations)
RIGGING PRACTICES QUESTIONS AND ANSWERS
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RIGGING PRACTICES QUESTIONS AND ANSWERS
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RIGGING PRACTICES QUESTIONS AND ANSWERSA load chart range diagram can best be used to help identify: - answer- net capacity
For mobile crane working at maximum radius, exceeding what percentage of the cranes
capacity requires the radius to be verified? - answer- 80%
The minimum depth of thread engagement for a 1/2 in eyebolt into steel object is? -
answer- 3/4 in
When tying knots in synthetic rope lashing, the rated load is increased by 50% ? -
answer- false
The size of shackle that can be used in the eye of a wire rope sling must be ________
the wire rope size? - answer- equal to or greater than
A shackle must be marked with the rated load, re-inspected due date, and the date
manufacture? - answer- false
When working near energized power lines where the crane or load could cross the
absolute limit of approach, what additional requirements must the crane team follow? -
answer- designated spotter must be stationed to watch clearances
The load weight of a personnel lift must not exceed _____ of the hoists rated capacity
for the working radius ? - answer- (50%)
A manufacturer's certificate of proof test may satisfy the initial test requirements for
rigging equipment? - answer- false
Which of the following operator actions will most likely cause a reduction in the capacity
of a mobile crane? - answer- booming down
An angular pull of 45 degrees is allowed on non shouldered type eye bolts? - answer-
false
Two slings creating a 60 degree sling angle are used to lift a 4,000 pound item. The
appropriate rated load for each sling is 2,000 pounds. - answer- false
When are loads allowed to be moved over personnel? - answer- never
Given a 1/2 in steel walled empty cylindrical tank that is opened at one end, calculate its
weight (round answer to the nearest hundred) - answer- 1800 lbs
A crane accident occurs when any one of the elements in the crane operating envelope
fails to perform correctly during crane operations, maintenance, or testing, which results
in any of the following except: - answer- over rigging the load
, A straight-line hitch is good for _____ of a sling rated load? - answer- 100%
The goal of the rigging gear test and inspection program is to prevent personnel injury -
answer- identify sub-standard equipment
What is the best way to prevent a load from swinging when it is lifted using a crane or a
hoist - answer- center the hook over the cg of the load
If you have an accident with a crane or you find damage and suspect an accident has
happened, your first step is to? - answer- stop operations as soon as safely possible
In general, you should never place the eye of the wire rope sling around an object that
has a diameter greater than - answer- 1/2
A pre-job briefing is not required prior to performing a complex lift? - answer- false
Natural fiber rope slings are not to be used for overhead lifting? - answer- true
Anti-two block devices are operational safety devices that can fail and must not be
relied upon to stop movement of the hoist? - answer- true
There is no difference in capacity between category 2 and category 3 cranes - answer-
false
Which of the following is an acceptable crane operating practice? - answer- routinely
lifting submerged parts out of dip tank
Pre-use inspections on rigging gear are performed for all of the following reasons
except? - answer- so documentation can be completed
What type of rigging gear inspections require documentation - answer- periodically
Distorted or twisted rigging hardware must be - answer- removed from service
When a sling is used in a choker configuration, its capacity is - answer- decreased
What should be used when attaching rigging gear to padeyes and lifting lugs - answer-
shackles
Removal of cracks from rigging hardware must be verified by ____ before it is returning
to service? - answer- non-destructive testing
A crane with capacity of 100,000 lbs is performing a lift of 90,000 lbs is an? - answer-
complex lift
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