advanced Flashcards
What is meant by the term “two blocking”?
The load block contacts the boom point sheaves.
Lifting 20,000 lbs with a 2-leg bridle sling at a 30 horizontal sling angle, what is the force applied to each leg?
20,000 pounds
In multiple crane lifts using an equalizer beam, the weight of the beam should be considered:
Part of the load weight
What is required of there is a deviation from the lift plan?
A new lift plan
On level ground using skids and rollers, what percent of the weight of the load should yield the required line pull as a general rule of thumb?
5%
All of the following are results of unbalanced reeving of the hook block EXCEPT:
Wear on the hook
Before a spreader bar or beams can be used the MUST have been:
Tested and Approved
When materials are being hoisted to an upper level, a tag line is used to:
Help control the load
Two cranes are lifting 100 tons. If crane A has 40% of the load, how much weight will crane B have on its hook?
60,000 lbs
To CONFIRM the rated capacity of a specific sling, consult the manufacturer’s:
Sling Tag
OSHA regulations require hook replacement if the opening exceeds what percentage of its original throat opening:
15%
At what percentage of increase in length should a chain sling be removed from service?
5%
The methodical process that attempts to identify hazards and devise plans to overcome or eliminate hazards which which may interfere whit crane of rigging is called:
Lift Plan
What provides additional control of a load being lifted?
Tag Lines
When traveling on a rubber tire mobile crane, how should the boom be positioned?
In line with the direction of travel
Before performing pick and carry operations with any mobile crane, it is important to:
Refer to the manufacturers capacity chart
According to ASME B30.5, a two crane lift is signaled by:
One designated person
What is the PRIMARY concern when working with high boom angles?
Backward stability
On multiple crane lifts, the load on each crane should NOT exceed what percentage of capacity?
75%
What are lifting lugs?
Eyelets welded to a steel plate for lifting
The formula for determining stress on a snatch block performing a vertical lift is: line pull x block factor = block load. What must be done to calculate formula?
Multiply the load weight by the coefficient of frictionto determine line pull, and the use the standard formula
if both fists are placed in front of your body with your thumbs pointed outward, the crane operator should:
Extend the boom sections
What is the MAXIMUM percent of the rated capacity of a crane that can be used to lift personnel?
50%
When does lightening present the greatest hazard to the crane and rigging personnel?
When thunder and lightning are apparent
What force would be required to move an object up an inclined plane compared to lifting it vertically?
1 1/2 times more
Personnel platforms shall NOT be used to lift:
Tools and materials without employees
All of the following are reasons for stopping personnel lifting operations EXCEPT:
There are no tag lines
When working in close quarters, the main concern is:
Safety
The point of any object’s weight can be assumed to be concentrated at:
Center of gravity
In a spur-gear chain hoist with a two chain system, the endless chain is used to:
Raise and lower the load
In an emergency situation, what is the rigger’s FIRST priority?
Te prevent injury of loss of life
All of the following conditions exert dynamic loading on a crane EXCEPT:
Static boom angle
Proper lead sheave placement as it relates to the hoisting drum location is:
Proper spooling of wire rope
The MOST important information to consider when planning a lift is:
Weight of the load
Prior to use, all new, altered, modified, or repaired rigging hardware shall be inspected by whom?
A designated person
An unsafe condition that riggers should be aware of when dealing with a multi part load block is:
Twisting multi part lines
Most cranes in duty cycle operation require a:
Load test
The only personnel allowed to have their body parts outside of the suspended personnel platform during hoisting and lowering operations are:
Signal persons
What is the most important reason rigging hardware should NOT be modified?
It could negatively affect its capacity
In the term (D / d ratio) the d is an abbreviation for:
Diameter
A document that outlines weights, crane configuration and rigging requirements for a lift is called a:
Lift plan
When using a 1-inch wire rope sling in a vertical basket hitch lifting a 24-foot long, 36-inch diameter pipe,
36 to 1
What is LMI?
Load movement indicator
Location of electrical hazards on the job site should be documented on a:
Lift plan
When forming a lift plan, a PRIMARY concern for the person doing the rigging is
Capacity of rigging
When using a wedge socket, the dead end of the rope is secured in the socket by the:
Wedge
When erecting or stowing a swing-away lattice extension, what should be used to control the movement of the extension?
Tag line
Planning for rigging is required:
Only when lifting any load
A lift plan MUST be completed by a:
Supervisor
Anchorage points for fall arrest for a single person MUST be able to hold:
500 lbs
Which of the following items are used for heavy rigging?
Slings, shackles, and spreader beam
If the jacket of a synthetic round sling is damaged, that sling should be:
Removed from service immediately
Which of the following is NOT a factor when making submerged lifts?
Water temperature
When a tugger is mounted where the operator can NOT see the load, the signal person MUST use:
Signals used for cranes
Who can designed a personnel platform?
A qualified personnel
A one-inch, 3-leg bridle wire rope sling, rigged at a 45degree angle, is good for 18 tons. The addition of a fourth leg will increase your capacity by:
0 lbs
After any structural repair or modification, a personnel lifting platform shall be tested to what percentage of the platform rating?
150%
All of the following statements about crane contact with power lines are TRUE EXCEPT:
The operator should leave the cab as quickly as possible
Loads introduced into the machine or its components due to accelerating or decelerating force is called:
Dynamic loading
Using the sling chart provided, what is the rated capacity of a 1/2 inch sling in a basket hitch with sling legs 90 degrees?
6,200 lbs
When lifting 100,000 pounds, the main load block must be reeved with how many parts of line?
4
What standard hand signal is being communicated in the illustration?
Travel (one track)
What standard hand signal is being communicated in the illustration?
Use whip line
