Rigging And Lifting Flashcards

1
Q

What is an Overhand Knot used for?

A

Being the starting point of many knots and frequently used as a stopper at the end of a rope.

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2
Q

What is a Figure Of Eight Knot used for?

A

Used at the end of a line to prevent the end from slipping through a fastening or loop in another line. Should be used to finish other knots especially when using synthetic ropes.

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3
Q

What is a Square Reef Knot used for?

A

Used for tying together two lines of the same size so that they will not slip.

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4
Q

What is a Bowline Knot used for?

A

Used for forming a loop in the end of a line. Easy to tie and untie, will not slip and can be used to secure loads without crushing them.

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5
Q

What is a Bowline On The Bight used for?

A

Putting a non slip loop anywhere between the ends of a rope.

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6
Q

What is the only grade of chain allowed to be used as overhead hoisting chain?

A

Grade A

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7
Q

Where would you find the grade of a chain?

A

Stamped on into its surface.

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8
Q

Chains used as slings should be supplied with what?

A

A master ring and hook attached.

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9
Q

When should you decommission hoisting chains because of wear?

A
  • For 1 inch or smaller = 5% of the diameter of the link.
  • For 1 inch or larger = 10% of the diameter of the link.
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10
Q

How efficient are poured sockets?

Where are they used?

A
  • They can take 100% of a wire ropes load capacity.
  • passenger or Freight Elevators
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11
Q

How efficient are Cappel Sockets?

A

They can take 100% of a wire ropes load capacity.

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12
Q

What is unique about Cappel Sockets?

A

They allow easy, frequent inspection of the whole section of rope where it is gripped.

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13
Q

How long must the dead end of a Wedge Socket be exposed?

A

6-9 inches

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14
Q

How efficient is a Wedge Socket?

A

They can take 70% of a wire ropes load capacity.

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15
Q

What are Wedge Sockets used for?

A

Quick and easy applying and detaching of secure ball or hooks for mobile cranes.

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16
Q

What do you do before cutting a wire rope?

A

Seize It

17
Q
  • What must you use when making eyes in wire ropes to prevent damage?
  • If not used what how much efficiency is lost?
A
  • A Thimble
  • 10% of wire rope strength is lost if no thimble is used.
18
Q

When a load is half off center of a hook how much rated load is lost?

What if it is on the tip?

A
  • 20%
  • 60%
19
Q

How are shackled sized?

A

By the diameter of the steel in the bow section.

20
Q

What should you use with a shackle to keep the load in the center?

A

Washers

21
Q

Where should a shackle be grabbed by a hook?

A

On the pin with centering washers.

22
Q

When lifting with a eye bolt. What should you always use and at what angle?

A

A shackle should always be used and the angle should be above 45 degrees.