Wire Rope test 1 Flashcards
What are the wire removal criteria for rotation resistant wire rope?
2 random broken wires in 6 diameters or 4 and 30 diameters
2/6 4/30
What is the where criteria for taking wire rope out of service?
1/3 wear of original dimensions
D/d ratios for Boom hoist sheaves Boom tip sheaves, hoist block sheaves
15 to 1 hoist sheaves
18 to 1 boom tip sheaves
16 to 1 hoist block sheaves
What are broken wire removal criteria for wire rope termination?
No more than 1 at the end, no more than 2 beyond the end
What is the formula for the number of clips required to make a turnback eye
Three times the diameter of the rope +1
What is the removal criteria for wire rope swings (broken wires)
Five broken wires in one strand in one lay , 10 broken wires in one lay
Five parts of wire rope
Wire, center wire, strand, core, wire rope
Describe daily inspection
Before each shift no records needed
Describe periodic inspection 
1-12 months recorded by qualified person
Non rotation resistant wire rope must extend ____ times the rope diameter beyond the wedge socket, and no less than ____ inches
6 times
6 inches
Rotation resistant wire rope must extend_____times the diameter, the tail on wedge socket must be no less than _____ inches
20 times
6 inches
Wire rope core is ____% stronger than fiber core
7.5%
Name a type of wire rope that has a tendency to untwist
Lang lay
What is IWRC
Independent wire rope core
How many wires and strands in a 6/19 wire rope
6 strands 19 wires
Describe a regular lay
The wires in the stands run in the same direction of the wire rope
Describe Lang lay
The wires in the strands run diagonally to the direction of the wire rope
What are the removal criteria for rigging hardware? 
5 broken wires in one strand in one lay Or 10 broken wires in one lay
6x25 Wire rope is what class? 
6 x 19
What is the proper tail length for a wedge socket?
6X the diameter non rotation resistant 20x the diameter rotation resistant but no less than 6 inches 
Minimum safety factor for lifting personnel With rotation resistant and non-rotation resistant wire rope
7/1 Rotation resistant
10/1 nonrotation resistant
What is the design factor for chain slings?
4/1
What is the design factor for wire rope swings, and synthetic slings
4/1
What is the minimum amount of wraps that can be on a host drum?
2 wraps
When operating a truck crane, what is the least stable allowable quadrant of operation
Over the side
According to ANSI B30.23 personal platform lifts should not be made with wind and excess of___mph
20 mph
When working near powerlines, when is a single person required
When working with an a booms length
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist rope
3.5 to 1 
Tipping capacities of crawler cranes are based on what percentage of tipping
75% 
How many broken wires in one strand of one lay for running rope, would cause for removal from service
3
Above the solid line or in shaded areas is for _________, and below is based on __________
Structural strength
Stability
Net capacity is equal to?
Gross capacity minus deductions
How many randomly broken wires would because to remove a running rope from service
6
What are the where criteria for taking a hook out of service?
10% where in the gut of the hook and 5% in the critical areas, or no more than a 1/4” at the mouth
What is PLP?
Permissible line pull
How are parts of line determined
Gross load, divided by permissible line pull
What is cabling?
When the block spins and the cables touch
What can be done to reduce cabling?
Adding parts of line, rotation resistant wire rope , tag lines
How far out of level may a crane be before the load chart is not valid
1%
What is duty cycle?
Repetitive motion like pouring concrete, hanging steel Driveing pile
What is the reduction in load chart capacities for duty cycle work?
20%
List three types of shackles
Bolt, screw, pin
Load chart capacities are divided into two categories. What are they?
Structural And stability 
Maximum included angle for a shackle
120°
Maximum included angle for a hook
90°
How much is a load chart derated during a personal lift
50%
Sorting hooks should be used at an angle less than how many degrees
45°
