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Crane Op Level 1 > Wire Rope And Rigging > Flashcards

Wire Rope And Rigging Flashcards

1
Q

Define Abrasion

A

Wearing, grinding, or rubbing away by friction.

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2
Q

Define Corrosion

A

Gradual wearing of wire rope by chemical action (rust, acids)

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3
Q

Define Grade

A

Wire rope or strand classification by strength and/or type of material.

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4
Q

Define Carbon Steel

A

Hardened steel, not alloyed with other metals

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5
Q

Define Fatigue

A

Progressive fracture resulting from the repeated bending of individual wires in a wire rope; may be accelerated by rust, lack of lubrication, etc

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6
Q

Define Tensile Strength

A

Greatest longitudinal stress an object can withstand without tearing apart

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7
Q

What word would describe ‘hardened steel, not alloyed with other metals’?

A

Carbon Steel

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8
Q

What word would describe ‘wire rope or strand classification by strength and/or type of material’?

A

Grade

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9
Q

What word would describe ‘wearing, grinding, or rubbing away by friction’?

A

Abrasion

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10
Q

What word would describe ‘progressive fracture resulting from the repeated bending of individual wires in a wire rope’?

A

Fatigue

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11
Q

What word would describe ‘greatest longitudinal stress and object can withstand without tearing apart’

A

Tensile Strength

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12
Q

What word would describe ‘gradual wearing of wire rope by chemical action’

A

Corrosion

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13
Q

What are the three wire rope components?

A

Core, Wires, Strands

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14
Q

What is the purpose of the core in a wire rope?

A

Forms the foundations for the strands

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15
Q

What is the purpose of the wires in a wire rope?

A

Forms the strands and collectively provide rope strength. Some strand designs require a “centre wire” around which other wires are wound to form a strand.

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16
Q

What is the purpose of strands in a wire rope?

A

Made up of multiple wires, laid helically (spiraled) around the core

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17
Q

Why is the core so important?

A

The core is the heart of a wire rope around which the main rope strands are laid. The core keeps the strands from jamming against or contracting each other under normal loads and flexing.

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18
Q

What are the three types of wire rope cores?

A

Fibre, Wire Strand Cord WSC, and Independent Wire Rope Core IWRC

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19
Q

What is the most common type of wire rope core?

A

IWRC

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20
Q

What are the advantages of IWRC?

A

Stretch less than fibre cores, better resistance to crushing loads, not affected by high temperatures, increases strength and weight of the wire rope.

21
Q

WSC has what type of core?

A

Same pattern as the strands.

22
Q

IWRC has what type of core?

A

Independent rope constructed of Lang lay strands. Core may be same pattern as wire rope.

23
Q

What is the benefit of Lang lay strands?

A

More wires = more tensile strength, more flexible, stronger.

24
Q

Define Preformed

A

Wires and strands are shaped helically during the manufacturing process in order to fit in the finished wire rope.

25
Q

What is the benefit of Preforming?

A

Eliminates built-in stress, resulting in better performance and greater durability.

26
Q

What is most wire rope made from?

A

Improved Plow Steel (IPS) a cold drawn carbon steel

27
Q

What is the tensile strength of IPS?

A

Between 240,000 and 260,000 psi

28
Q

Increasing the grade of steel from which wire rope is made increases its breaking strength by ____

29
Q

What is EEIPS?

A

Extra extra improved plow steel

30
Q

What is EIPS?

A

Extra improved plow steel

31
Q

How do you determine the Grade of a rope?

A

It can only be determined by the manufacturer.

32
Q

True or False: The size and number of wires in a strand must be balanced between large and small wires?

33
Q

Are wires with smaller or larger strands more flexible?

A

Smaller strands.

34
Q

What are the four types of strand construction?

A

Single Layer/Ordinary, Filler Wire, Seale, Warrington

35
Q

What is Warrington wire rope designed for?

A

Boom Hoist

36
Q

What is Seale wire rope designed for?

A

Hauling and Rotary

37
Q

What is Filler wire rope designed for?

A

Load lines

38
Q

What is Ordinary rope designed for?

39
Q

What are the two characteristics of Ordinary rope?

A

All wires are the same size, good resistance to abrasion

40
Q

What are the two characteristics of Seale rope?

A

Resistant to abrasion and crushing, medium fatigue resistance.

41
Q

What are the two characteristics of Filler rope?

A

Less abrasion resistance, more bending fatigue resistance

42
Q

What are the two characteristics of Warrington rope?

A

Good balance of abrasion and fatigue resistance, high structural strength

43
Q

IWRC is __% stronger

44
Q

What is the main difference between Langs lay and Regular lay?

A

Lang goes with the flow of the strands, regular goes the opposite of the strands.

45
Q

Which is more bendy, and which is stronger, Langs lay or regular lay?

A

Langs lay: more bendy
Regular lay: stronger

46
Q

Can you have a rope with both langs lay and regular lay?

A

Yes, it is called “alternate lay”

47
Q

What are regular lay ropes used for? And why?

A

Hoist lines and slings because they are more resistant to crushing.

48
Q

How do you determine rope lay distance?

A

The distance that it takes for one strand to make one “complete revolution” around the core.

49
Q

What are the four types of wire rope classifications?

A

Course lay, flexible, extra flexible, special flexible

Crane Op Level 1 (1 decks)

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