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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
Q

A grade of steel used in the manufacture of wire rope

A

Plow steel (PS)

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26
Q

Wires that are permanently formed doing fabrication into the helical shape they will be in when placed in a strand.

A

Preformed

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27
Q

Rope system in which the rope travels around drums and sheaves to change direction or increase mechanical advantage

A

Reeve

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28
Q

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

A

Seizing

29
Q

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.

A

Sheave

30
Q

Molten metal, specifically zinc

A

Spelter

31
Q

A grouping of round or shaped wires helically laid around a core

A

Strand

32
Q

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

A

Strand pattern

33
Q

The load placed on a wire rope divided by the cross-sectional area of the wire

A

Stress

34
Q

The elongation of a wire rope under load

A

stretch

35
Q

A single, continuous length of metal, cold-drawn or cold-rolled from a rod, available in various cross-sections

A

Wire

36
Q

A wire strand used as the axial center member of a wire rope

A

Wire strand core (WSC)

37
Q

The three parts of a wire rope are the wire, the strands, and the…

A

Core

38
Q

The greatest steel with the highest breaking stress is_____steal

A

Extra extra improved plow

39
Q

The wire used in rope can be made of steel, iron, monel, or_____

A

Bronze

40
Q

Wire rope cores are identified as fiber core, wire strand core, or_____core

A

Seale

41
Q

What type of lay is indicated when the strands are wrapped around the core in a counterclockwise direction?

A

Left lay

42
Q

When the individual wires of a strand on a rope or perpendicular to the run of the rope, it is classified as_____lay

A

Lang

43
Q

The four basic strand patterns are wire, Warrington, filler, and…

A

Seale

44
Q

Within the 6 x 37 classification of rope, the_____can vary from 31 to 49.

A

Number of wires in a strand

45
Q

All rope ends must be welded and tapered to prevent fraying

(T/F)

A

False

46
Q

The lowest efficiency rating of a wire rope with a loop or thimble splice, hand tucked, is_____percent

A

70

47
Q

The efficiency rating of a wire rope assembly is a percentage of the…

A

Nominal breaking strength

48
Q

What type of end termination provides the highest efficiency rating?

A

Swaged socket

49
Q

A fabricated socket has an efficiency rating of_____percent

A

100

50
Q

A swaged socket is not recommended for_____type of wire rope

A

FC

51
Q

FIX The dead end of the wire rope experience is the weight of the load (T/F)

A

False

52
Q

In a wedge socket, the tail length of the dead end of the rope should be at least…

A

Six rope diameters

53
Q

The U-boat type of clip consist of the U-boat, the nuts, and the…

A

Saddle

54
Q

How often should the running rope of a mobile crane be inspected for gross damage?

A

Daily

55
Q

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.

A

1/3

56
Q

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

A

Kinks

57
Q

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

A

One

58
Q

Damaged flanges on a sheave can cause the wire rope to_____

A

Jump out of the groove

59
Q

The two critical areas to inspect on a sheave all the bearings and the_____

A

Groove dimensions

60
Q

A series of sheaves stacked in a support frame with a hook attached is a…

A

Load block

61
Q

The D/d ratio is used to_____

A

Check if different products are compatible

62
Q

To reduce internal friction and prevent corrosion, a wire rope, should be_____on a regular basis

A

Lubricated

63
Q

Placing a rope in sheaves is known as

A

Reeving

64
Q

The easiest method for determining the parts of a line needed for a lift is too…

A

Check the load chart

65
Q

What is the minimum safety factor on a boom planet or standing rope for boom erection?

A

2.5

66
Q

The safety factor for Leivo running route for boom erection is____

A

3.0.

67
Q

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

A

Using a longer wire rope

68
Q

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)

A

False

69
Q

The component that actually transfers the power of the crane to the wire rope is the…

A

Hoist drum

NCCER Mobile Crane Operations Terms (4 decks)

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