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NCCER Mobile Crane Operations Terms > Wire Rope > Flashcards

Wire Rope Flashcards

1
Q

Frictional wear on a rope

A

Abrasion

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2
Q

Heated to reduce stress, increase strength

A

Annealed

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3
Q

A term used to describe a condition of a wire rope, where it is forced to compression, and the outer strands are forced away from the core, forming a cage

A

Birdcaging

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4
Q

The axial part of a wire rope, on which the strands are laid

A

Core

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5
Q

The chemical breakdown of the materials in a wire rope through an adverse reaction to acids, bases, or moisture

A

Corrosion

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6
Q

The excess wire rope exposed after some type of end termination has been properly fitted. The part of the wire rope that is not exposed to the strain, applied by any type of load, such as a load block, ball or rigging gear.

A

Dead end

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7
Q

The ratio of the nominal strength to the total working load for a wire rope

A

Design factor

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8
Q

A cylindrical barrel on which a rope is wound for either storage or operation

A

Drum

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9
Q

The ratio of a wire rope’s actual, breaking strength to the aggregate strength of all individual wires, tested separately; this is usually expressed as a percentage

A

Efficiency

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10
Q

The process of progressive fracture resulting from the bending of individual wires. These fractures may occur at bending stresses well below the ultimate strength of the material. Lack of lubrication and rust on a wire rope can accelerate this process.

A

Fatigue

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11
Q

A cord or a rope of synthetic fiber used as a center of a wire rope

A

FiberCore (FC)

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12
Q

Small wires within a strand used as spacers that help hold the position and support other wires

A

Filler wire

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13
Q

A wire rope or strand classification by any number of factors, such as type of material and strength

A

Grade

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14
Q

Ball used in conjunction with the hoisting hook

A

Headache ball

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15
Q

Wire rope used as the core of a larger rope

A

Independent wire rope core (IWRC)

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16
Q

All strand wire, except the outer or cover wires

A

Inner wires

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17
Q

Deformation of a wire rope caused by loop of rope being pulled tight. This causes irreparable damage to the rope.

A

Kink

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18
Q

The distance measured parallel to the axis of the rope or strand in which a strand or wire makes one revolution around the core or center

A

Lay (length)

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19
Q

The manner that the wires in a strand of wire rope are laid in the form of a spiral

A

Lay (Strand)

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20
Q

The part of the wire that is exposed to all weight applied to the wire rope

A

Live section

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21
Q

A wire rope sheave enclosed inside plates with a lifting attachment (hook or shackle)

A

Load block

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22
Q

A 360° change of direction of a wire rope that results in a kink when pulled tight

A

Loop

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23
Q

A trademark alloy made of copper and nickel

A

Monel

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24
Q

The ultimate load at which a wire rope will fail

A

Nominal breaking strength

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25
A grade of steel used in the manufacture of wire rope
Plow steel (PS)
26
Wires that are permanently formed doing fabrication into the helical shape they will be in when placed in a strand.
Preformed
27
Rope system in which the rope travels around drums and sheaves to change direction or increase mechanical advantage
Reeve
28
The securing of an open end of a wire rope by wrapping a wire or a strand tightly around its circumference several times. This action prevents fraying and unravelling of the wire rope. This preparation is also used on wire rope prior to cutting it for length from a spool/reel
Seizing
29
One of a number of grooved pulleys that guide the wire rope. The types may include, but are not limited to, the following types: equalizing, boom tip, idler, and rollers.
Sheave
30
Molten metal, specifically zinc
Spelter
31
A grouping of round or shaped wires helically laid around a core
Strand
32
Any one of a number of configurations of strand wires used to form a strand. Types of patterns may include, but are not limited to, the following: Seale, Warrington, and filler
Strand pattern
33
The load placed on a wire rope divided by the cross-sectional area of the wire
Stress
34
The elongation of a wire rope under load
stretch
35
A single, continuous length of metal, cold-drawn or cold-rolled from a rod, available in various cross-sections
Wire
36
A wire strand used as the axial center member of a wire rope
Wire strand core (WSC)
37
The three parts of a wire rope are the wire, the strands, and the…
Core
38
The greatest steel with the highest breaking stress is_____steal
Extra extra improved plow
39
The wire used in rope can be made of steel, iron, monel, or_____
Bronze
40
Wire rope cores are identified as fiber core, wire strand core, or_____core
Seale
41
What type of lay is indicated when the strands are wrapped around the core in a counterclockwise direction?
Left lay
42
When the individual wires of a strand on a rope or perpendicular to the run of the rope, it is classified as_____lay
Lang
43
The four basic strand patterns are wire, Warrington, filler, and…
Seale
44
Within the 6 x 37 classification of rope, the_____can vary from 31 to 49.
Number of wires in a strand
45
All rope ends must be welded and tapered to prevent fraying (T/F)
False
46
The lowest efficiency rating of a wire rope with a loop or thimble splice, hand tucked, is_____percent
70
47
The efficiency rating of a wire rope assembly is a percentage of the…
Nominal breaking strength
48
What type of end termination provides the highest efficiency rating?
Swaged socket
49
A fabricated socket has an efficiency rating of_____percent
100
50
A swaged socket is not recommended for_____type of wire rope
FC
51
***FIX*** The dead end of the wire rope experience is the weight of the load (T/F)
False
52
In a wedge socket, the tail length of the dead end of the rope should be at least…
Six rope diameters
53
The U-boat type of clip consist of the U-boat, the nuts, and the…
Saddle
54
How often should the running rope of a mobile crane be inspected for gross damage?
Daily
55
As part of the inspection criteria, most standards require rope to be removed from service. If the where on the outer wire exceeds_____of the original diameter.
1/3
56
Some minor defects in the wire rope can be tolerated, but if any_____is/are found during inspection, the wire rope must be immediately removed from use
Kinks
57
Wire rope needs to be replaced if there is/are_____broken outer wires at the point of contact with the core that physically protrudes or labs loops out of the wire structure
One
58
Damaged flanges on a sheave can cause the wire rope to_____
Jump out of the groove
59
The two critical areas to inspect on a sheave all the bearings and the_____
Groove dimensions
60
A series of sheaves stacked in a support frame with a hook attached is a…
Load block
61
The D/d ratio is used to_____
Check if different products are compatible
62
To reduce internal friction and prevent corrosion, a wire rope, should be_____on a regular basis
Lubricated
63
Placing a rope in sheaves is known as
Reeving
64
The easiest method for determining the parts of a line needed for a lift is too…
Check the load chart
65
What is the minimum safety factor on a boom planet or standing rope for boom erection?
2.5
66
The safety factor for Leivo running route for boom erection is____
3.0.
67
All of the following can be used to minimize block, twisting, except_____ – Reducing the load – Using a longer wire rope – Using an even number of parts of line – Using a tagline
Using a longer wire rope
68
If you are directed to overwind a right Lee rope onto a drum, you would secure the rope on the right side of the drum and move right to left. (T/F)
False
69
The component that actually transfers the power of the crane to the wire rope is the…
Hoist drum

NCCER Mobile Crane Operations Terms (4 decks)

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