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Rigging practices Questions With Complete Solutions 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 Correct Answers 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? Correct Answers 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: Correct Answers over rigging the load a crane with capacity of 100,000 lbs is performing a lift of 90,000 lbs is an? Correct Answers complex lift A load chart range diagram can best be used to help identify: Correct Answers net capacity
a manufacturer's certificate of proof test may satisfy the initial test requirements for rigging equipment? Correct Answers false a pre-job briefing is not required prior to performing a complex lift? Correct Answers false a shackle must be marked with the rated load, re- inspected due date, and the date manufacture? Correct Answers false a straight-line hitch is good for _____ of a sling rated load? Correct Answers 100% according to the NAVFAC P-307, what are the two types of crane lifts? Correct Answers complex and non complex according to the NAVFAC P-307, which of the following is a primary responsibility of the rigger in charge Correct Answers 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? Correct Answers false
gross capacity on a load chart refers to the amount of weight that can be lifted by the crane Correct Answers 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? Correct Answers 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? Correct Answers 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 Correct Answers 1/ increasing the sling angle from horizontal _______ the stress in the sling? Correct Answers decreases lifts of materials such as oxygen, acetylene, propane, or gasoline in bottles, cans, tanks, or properly secured in racks designed for lifting by a crane are considered? Correct Answers complex lift
natural fiber rope slings are not to be used for overhead lifting? Correct Answers true never bend a wire rope around a diameter _______ itself Correct Answers smaller than pre-use inspections on rigging gear are performed for all of the following reasons except? Correct Answers so documentation can be completed removal of cracks from rigging hardware must be verified by ____ before it is returning to service? Correct Answers non-destructive testing rigging gear test and inspection records must include: Correct Answers all of the information listed above signal for boom down and raise hoist Correct Answers d signal for boom up and lower hoist Correct Answers c signal for emergency stop Correct Answers d signal for move slow Correct Answers e
the minimum crane team consist of? Correct Answers the crane operator and rigger-in-charge the minimum depth of thread engagement for a 1/2 in eyebolt into steel object is? Correct Answers 3/4 in the rated load of shouldered eyebolts must be reduced at angular pulls? Correct Answers true the signal for hoist Correct Answers a the signal for lower boom Correct Answers b the signal for lowering Correct Answers a the signal for stop Correct Answers b the signal indicated which hook on multiple hoist cranes Correct Answers c the size of shackle that can be used in the eye of a wire rope sling must be ________ the wire rope size? Correct Answers equal to or greater than the volume of the cylinder is ______ cubic feet Correct Answers 9.
there are three slings hanging from a hook. each sling has a rated capacity of 2,000 lbs. what is the heaviest load that could be lifted using these slings if they were attached to a single point Correct Answers 2000 lbs there is no difference in capacity between category 2 and category 3 cranes Correct Answers false to whom or what are the majority of crane accidents attributed? Correct Answers personnel error two people should be used to pull the hand chain of a manual chain hoist when it gets too hard for on person to pull. Correct Answers 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. Correct Answers false weight distribution at the attachment points is determined by measuring the... Correct Answers distance they are from the CG
when making a four-point lift using slings, they should normally be chosen such that _____ legs have/has the capacity to support the entire load weight including the additional stress due to lifting angle. Correct Answers 2 when moving a truck, cruiser, or crawler crane to and from job sites, always secure the ______ to the carrier frame? Correct Answers hooks when rigging your own loads, you are responsible for? Correct Answers all of the above when tying knots in synthetic rope lashing, the rated load is increased by 50%? Correct Answers 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? Correct Answers designated spotter must be stationed to watch clearances which of the following attachment points can be used at full capacity when pulled at any angle from vertical? Correct Answers swivel hoist rings
which of the following is an acceptable crane operating practice? Correct Answers routinely lifting submerged parts out of dip tank which of the following operator actions will most likely cause a reduction in the capacity of a mobile crane? Correct Answers booming down which of the following shackles must never be side loaded? Correct Answers round pin shackle while traveling a crane with a load, loads should be kept? Correct Answers as low as possible why must hoisting be stopped once the load is completely off the ground? Correct Answers to determine sling angle stress
