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Crane Class > License practice test Part 3 > Flashcards

License practice test Part 3 Flashcards

1
Q

What is the ultimate breaking strength wire core formula?

A

d x d x 45 = UBS

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2
Q

How many wires per strand in 6x37 wire rope?

A

6 strands 37 wires per strand

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3
Q

What is the rotation resistant wire rope safety factor?

A

5:1

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4
Q

How do you determine parts of line required?

A

Total suspended load divided by SWL or PLP which ever is lower

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5
Q

What does the range diagram illustrate?

A

Tip height
Boom angle
Radius
Crane configuration
Jib offset
Hook fall length

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6
Q

What is fatigue?

A

A material being over stressed to the point of failure

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7
Q

What is IWRC

A

Independent wire rope core

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8
Q

Describe regular lay

A

The wires and strands fall in opposite direction

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9
Q

Describe lang lay

A

The wires and strands fall in the same direction

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10
Q

What are the removal criteria for rigging hardware?

A

10% broken wires in 8 rope diameters

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11
Q

6x25 wire rope is what class?

A

6x19

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12
Q

What is working load limit?

A

Ultimate breaking strength divided by the safety factor

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13
Q

What is the proper tail length for wedge sockets?

A

IWRC 6 times the diameter of the wire rope

Rotation resistant 20 times the diameter

No less than 6 inches

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14
Q

A hook has to be less than ___ the Flemish eye

A

1/2

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15
Q

A choker hitch has % capacity of a single leg?

A

75%

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16
Q

The double choker hitch has a capacity of % to that of a bridle of the same angle

A

75%

17
Q

What is the termination efficiency of a wire rope clip turn back eye?

A

90% 1 inch and over
80% under one inch

18
Q

Criteria for measuring wire rope?

A

Crown to crown
3 times for 6 strand
4 times for 8 strand

19
Q

Safety factors of standing rope

A

Working 3.0:1
Erecting 2.5:1

20
Q

7 steps to reduce cabling

A

Tag lines
Symmetrical reeving
Even parts
Changing sheaves
Shorten length of fall
Rotation resistant wire rope
Change block

21
Q

D/d ratio of a basket hitch

A

25/1

22
Q

Safety factor for running rope for personnel lift?

A

IWRC 7:1
Rotation resistant 10:1

23
Q

What is the ultimate breaking strength formula for fiber core?

A

d x d x 42 = UBS in tons

24
Q

What is the design factor for chain slings?

A

4:1

25
Q

What is the design factor for wire rope slings and fiber slings?

A

5:1

26
Q

What is the formula for determining safe working load in wire rope rigging?

A

d x d x 8 = SWL

27
Q

What is the ultimate breaking strength wire core formula?

A

d x d x 45 = UBS

28
Q

What is the rotation resistant wire rope safety factor?

A

5:1

29
Q

What are the safety factors of running rope?

A

Working 3.5 to 1
Erecting 3.0 to 1

Crane Class (18 decks)

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