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Crane Class > Wire Rope test 1 > Flashcards

Wire Rope test 1 Flashcards

1
Q

What are the wire removal criteria for rotation resistant wire rope?

A

2 random broken wires in 6 diameters or 4 and 30 diameters
2/6 4/30

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2
Q

What is the where criteria for taking wire rope out of service?

A

1/3 wear of original dimensions

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3
Q

D/d ratios for Boom hoist sheaves Boom tip sheaves, hoist block sheaves

A

15 to 1 hoist sheaves
18 to 1 boom tip sheaves
16 to 1 hoist block sheaves

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4
Q

What are broken wire removal criteria for wire rope termination?

A

No more than 1 at the end, no more than 2 beyond the end

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5
Q

What is the formula for the number of clips required to make a turnback eye

A

Three times the diameter of the rope +1

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6
Q

What is the removal criteria for wire rope swings (broken wires)

A

Five broken wires in one strand in one lay , 10 broken wires in one lay

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7
Q

Five parts of wire rope

A

Wire, center wire, strand, core, wire rope

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8
Q

Describe daily inspection

A

Before each shift no records needed

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9
Q

Describe periodic inspection 

A

1-12 months recorded by qualified person

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10
Q

Non rotation resistant wire rope must extend ____ times the rope diameter beyond the wedge socket, and no less than ____ inches

A

6 times
6 inches

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11
Q

Rotation resistant wire rope must extend_____times the diameter, the tail on wedge socket must be no less than _____ inches

A

20 times
6 inches

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12
Q

Wire rope core is ____% stronger than fiber core

A

7.5%

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13
Q

Name a type of wire rope that has a tendency to untwist

A

Lang lay

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14
Q

What is IWRC

A

Independent wire rope core

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15
Q

How many wires and strands in a 6/19 wire rope

A

6 strands 19 wires

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16
Q

Describe a regular lay

A

The wires in the stands run in the same direction of the wire rope

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17
Q

Describe Lang lay

A

The wires in the strands run diagonally to the direction of the wire rope

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18
Q

What are the removal criteria for rigging hardware? 

A

5 broken wires in one strand in one lay Or 10 broken wires in one lay

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19
Q

6x25 Wire rope is what class? 

A

6 x 19

20
Q

What is the proper tail length for a wedge socket?

A

6X the diameter non rotation resistant 20x the diameter rotation resistant but no less than 6 inches 

21
Q

Minimum safety factor for lifting personnel With rotation resistant and non-rotation resistant wire rope

A

7/1 Rotation resistant
10/1 nonrotation resistant

22
Q

What is the design factor for chain slings?

A

4/1

23
Q

What is the design factor for wire rope swings, and synthetic slings

A

4/1

24
Q

What is the minimum amount of wraps that can be on a host drum?

A

2 wraps

25
Q

When operating a truck crane, what is the least stable allowable quadrant of operation

A

Over the side

26
Q

According to ANSI B30.23 personal platform lifts should not be made with wind and excess of___mph

A

20 mph

27
Q

When working near powerlines, when is a single person required

A

When working with an a booms length

28
Q

What is the minimum design factor required for a right regular lay main boom or auxiliary hoist rope

A

3.5 to 1 

29
Q

Tipping capacities of crawler cranes are based on what percentage of tipping

A

75% 

30
Q

How many broken wires in one strand of one lay for running rope, would cause for removal from service

A

3

31
Q

Above the solid line or in shaded areas is for _________, and below is based on __________

A

Structural strength

Stability

32
Q

Net capacity is equal to?

A

Gross capacity minus deductions

33
Q

How many randomly broken wires would because to remove a running rope from service

A

6

34
Q

What are the where criteria for taking a hook out of service?

A

10% where in the gut of the hook and 5% in the critical areas, or no more than a 1/4” at the mouth

35
Q

What is PLP?

A

Permissible line pull

36
Q

How are parts of line determined

A

Gross load, divided by permissible line pull

37
Q

What is cabling?

A

When the block spins and the cables touch

38
Q

What can be done to reduce cabling?

A

Adding parts of line, rotation resistant wire rope , tag lines

39
Q

How far out of level may a crane be before the load chart is not valid

A

1%

40
Q

What is duty cycle?

A

Repetitive motion like pouring concrete, hanging steel Driveing pile

41
Q

What is the reduction in load chart capacities for duty cycle work?

A

20%

42
Q

List three types of shackles

A

Bolt, screw, pin

43
Q

Load chart capacities are divided into two categories. What are they?

A

Structural And stability 

44
Q

Maximum included angle for a shackle

A

120°

45
Q

Maximum included angle for a hook

A

90°

46
Q

How much is a load chart derated during a personal lift

A

50%

47
Q

Sorting hooks should be used at an angle less than how many degrees

A

45°

Crane Class (18 decks)

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