Rigging practices course Practice Question and Answer

Rigging practices course Practice Question and Answer

 

A load chart range diagram can best be used to help identify:

 

 

net capacity

 

 

for mobile crane working at maximum radius, exceeding what percentage of the cranes capacity requires the radius to be verified?

 

 

80%

 

 

the minimum depth of thread engagement for a 1/2 in eyebolt into steel object is?

 

 

3/4 in

 

 

 

when tying knots in synthetic rope lashing, the rated load is increased by 50% ?

 

 

false

 

 

the size of shackle that can be used in the eye of a wire rope sling must be ________ the wire rope size?

 

 

equal to or greater than

 

 

a shackle must be marked with the rated load, re-inspected due date, and the date manufacture?

 

 

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?

 

 

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 ?

 

 

(50%)

 

 

a manufacturer’s certificate of proof test may satisfy the initial test requirements for rigging equipment?

 

 

false

 

 

which of the following operator actions will most likely cause a reduction in the capacity of a mobile crane?

 

 

booming down

 

 

an angular pull of 45 degrees is allowed on non shouldered type eye bolts?

 

 

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.

 

 

false

 

 

when are loads allowed to be moved over personnel?

 

 

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)

 

 

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:

 

 

over rigging the load

 

 

a straight-line hitch is good for _____ of a sling rated load?

 

 

100%

 

 

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

 

 

2000 lbs

 

 

why must hoisting be stopped once the load is completely off the ground?

 

 

to determine sling angle stress

 

 

the minimum crane team consist of ?

 

 

the crane operator and rigger-in-charge

 

 

while traveling a crane with a load, loads should be kept?

 

 

as low as possible

 

 

attachment points must be visually inspected?

 

 

before and after each use

 

 

 

when rigging your own loads, you are responsible for?

 

 

all of the above

 

 

rigging gear test and inspection records must include:

 

 

all of the information listed above

 

 

the crane operator is responsible for the safe _____ of the crane

 

 

operation

 

 

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?

 

 

notify the operator and work cautiously near the obstruction

 

 

what is the minimum distance any part of the crane or load may approach an energized power line under 50,000 volts during a proposed operation?

 

 

20ft

 

 

according to the NAVFAC P-307, what are the two types of crane lifts ?

 

 

complex and non complex

 

 

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.

 

 

2

 

 

the volume of the cylinder is ______ cubic feet

 

 

9.42

 

 

calculate the tension in leg A

 

 

1607

 

 

 

increasing the sling angle from horizontal _______ the stress in the sling?

 

 

decreases

 

 

weight distribution at the attachment points is determined by measuring the…

 

 

distance they are from the CG

 

 

to whom or what are the majority of crane accidents attributed?

 

 

personnel error

 

 

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?

 

 

27×105=2,835+1,200= 4,035 lbs

 

 

according to the NAVFAC P-307, which of the following is a primary responsibility of the rigger in charge

 

 

establish the method of communications and provides a signal to the operator

 

 

never bend a wire rope around a diameter _______ itself

 

 

smaller than

 

 

which of the following attachment points can be used at full capacity when pulled at any angle from vertical?

 

 

swivel hoist rings

 

 

the rated load of shouldered eyebolts must be reduced at angular pulls?

 

 

true

 

 

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 ?

 

 

complex lift

 

 

 

the area of this triangle with dimensions givens in feet is:

 

 

24 square feet

 

 

gross capacity on a load chart refers to the amount of weight that can be lifted by the crane

 

 

before deductions are subtracted

 

 

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.

 

 

false

 

 

the goal of the rigging gear test and inspection program is to prevent personnel injury

 

 

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

 

 

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?

 

 

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

 

 

1/2

 

 

a pre-job briefing is not required prior to performing a complex lift?

 

 

false

 

 

natural fiber rope slings are not to be used for overhead lifting?

 

 

true

 

 

anti-two block devices are operational safety devices that can fail and must not be relied upon to stop movement of the hoist?

 

 

true

 

 

there is no difference in capacity between category 2 and category 3 cranes

 

 

false

 

 

which of the following is an acceptable crane operating practice?

 

 

routinely lifting submerged parts out of dip tank

 

 

pre-use inspections on rigging gear are performed for all of the following reasons except?

 

 

so documentation can be completed

 

 

what type of rigging gear inspections require documentation

 

 

periodically

 

 

distorted or twisted rigging hardware must be

 

 

removed from service

 

 

when a sling is used in a choker configuration, its capacity is

 

 

decreased

 

 

what should be used when attaching rigging gear to padeyes and lifting lugs

 

 

shackles

 

 

removal of cracks from rigging hardware must be verified by ____ before it is returning to service?

 

 

non-destructive testing

 

 

a crane with capacity of 100,000 lbs is performing a lift of 90,000 lbs is an?

 

 

complex lift

 

 

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

 

 

rigger

 

 

which of the following shackles must never be side loaded?

 

 

round pin shackle

 

 

what markings are required on hoists

 

 

the manufacturer, model number, rated load, and re-inspection due date

 

 

when moving a truck, cruiser, or crawler crane to and from job sites, always secure the ______ to the carrier frame?

 

 

hooks

 

 

the signal indicated which hook on multiple hoist cranes

 

 

c

 

 

the signal for stop

 

 

b

 

 

the category for this crane (20000k)

 

 

category 3