Rigging practices
a _____ may be assigned by the rigger-in-charge to assist the operator with the pre-use check,
select and inspect rigging gear and rig loads - ANS-rigger
\a box has 27 cubic ft of sand in it. sand weighs 105 lbs per cubic ft. the box weighs 1,200 lbs
empty. the correct equation to find the total weight is? - ANS-27x105=2,835+1,200= 4,035 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: - ANS-over rigging the load
\a crane with capacity of 100,000 lbs is performing a lift of 90,000 lbs is an? - ANS-complex lift
\A load chart range diagram can best be used to help identify: - ANS-net capacity
\a manufacturer's certificate of proof test may satisfy the initial test requirements for rigging
equipment? - ANS-false
\a pre-job briefing is not required prior to performing a complex lift? - ANS-false
\a shackle must be marked with the rated load, re-inspected due date, and the date
manufacture? - ANS-false
\a straight-line hitch is good for _____ of a sling rated load? - ANS-100%
\according to the NAVFAC P-307, what are the two types of crane lifts ? - ANS-complex and non
complex
\according to the NAVFAC P-307, which of the following is a primary responsibility of the rigger
in charge - ANS-establish the method of communications and provides a signal to the operator
\an angular pull of 45 degrees is allowed on non shouldered type eye bolts? - ANS-false
\anti-two block devices are operational safety devices that can fail and must not be relied upon
to stop movement of the hoist? - ANS-true
\attachment points must be visually inspected? - ANS-before and after each use
\calculate the tension in leg A - ANS-1607
\category of crane (white truck) - ANS-category 4
\distorted or twisted rigging hardware must be - ANS-removed from service
\for mobile crane working at maximum radius, exceeding what percentage of the cranes
capacity requires the radius to be verified? - ANS-80%
\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) - ANS-1800 lbs
\gross capacity on a load chart refers to the amount of weight that can be lifted by the crane -
ANS-before deductions are subtracted
\if a crane team member sees an obstruction in the crane operating envelope that could pose a
threat to the crane operations, what course of action is the best to take? - ANS-notify the
operator and work cautiously near the obstruction
\if you have an accident with a crane or you find damage and suspect an accident has
happened, your first step is to? - ANS-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 - ANS-1/2
\increasing the sling angle from horizontal _______ the stress in the sling? - ANS-decreases
a _____ may be assigned by the rigger-in-charge to assist the operator with the pre-use check,
select and inspect rigging gear and rig loads - ANS-rigger
\a box has 27 cubic ft of sand in it. sand weighs 105 lbs per cubic ft. the box weighs 1,200 lbs
empty. the correct equation to find the total weight is? - ANS-27x105=2,835+1,200= 4,035 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: - ANS-over rigging the load
\a crane with capacity of 100,000 lbs is performing a lift of 90,000 lbs is an? - ANS-complex lift
\A load chart range diagram can best be used to help identify: - ANS-net capacity
\a manufacturer's certificate of proof test may satisfy the initial test requirements for rigging
equipment? - ANS-false
\a pre-job briefing is not required prior to performing a complex lift? - ANS-false
\a shackle must be marked with the rated load, re-inspected due date, and the date
manufacture? - ANS-false
\a straight-line hitch is good for _____ of a sling rated load? - ANS-100%
\according to the NAVFAC P-307, what are the two types of crane lifts ? - ANS-complex and non
complex
\according to the NAVFAC P-307, which of the following is a primary responsibility of the rigger
in charge - ANS-establish the method of communications and provides a signal to the operator
\an angular pull of 45 degrees is allowed on non shouldered type eye bolts? - ANS-false
\anti-two block devices are operational safety devices that can fail and must not be relied upon
to stop movement of the hoist? - ANS-true
\attachment points must be visually inspected? - ANS-before and after each use
\calculate the tension in leg A - ANS-1607
\category of crane (white truck) - ANS-category 4
\distorted or twisted rigging hardware must be - ANS-removed from service
\for mobile crane working at maximum radius, exceeding what percentage of the cranes
capacity requires the radius to be verified? - ANS-80%
\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) - ANS-1800 lbs
\gross capacity on a load chart refers to the amount of weight that can be lifted by the crane -
ANS-before deductions are subtracted
\if a crane team member sees an obstruction in the crane operating envelope that could pose a
threat to the crane operations, what course of action is the best to take? - ANS-notify the
operator and work cautiously near the obstruction
\if you have an accident with a crane or you find damage and suspect an accident has
happened, your first step is to? - ANS-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 - ANS-1/2
\increasing the sling angle from horizontal _______ the stress in the sling? - ANS-decreases
