fiber rope Flashcards
The two main types of fiber rope are:
1. natural and synthetic
2. nylon and natural
3. manila and synthetic
4. none of above
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- natural and synthetic
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The color of Number One Manila is:
1. dark brown
2. light yellow
3. silver
4. depends on manufacturer
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- light yellow
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Which of these natural fiber ropes is considered to be the strongest?
1. hemp
2. sisal
3. coir
4. manila
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- hemp
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Which of these synthetic fiber ropes Is the strongest?
1. polyethylene
2. polyester
3. polypropylene
4. nylon
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- nylon
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Determine if the following statement is true or false. The individual strand fibers in a manila rope are full length.
Therefore a manila rope is much stronger and elastic than a nylon rope.
1. true
2. false
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- false
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Determine if the following statement Is true or false. If a load, equal to 50% of the breaking strength of a manila rope is left hanging for several hours, the rope will pull apart.
1. true
2. false
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- true
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What is done to prevent the ends of a natural fiber rope from untwisting?
1. melt the ends
2. whip the ends
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- whip the ends
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What Is done to prevent the ends of a synthetic fiber rope from untwisting?
1. melt the ends
2. whip the ends
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- melt the ends
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What are the two Design (safety) Factors for fiber rope being used to hoist personnel, and for general use ?
1. 10 - 1 and 5 - 1
2. 20 - 1 and 15 - 1
3. 30 - 1 and 20 - 1
4. 50 - 1 and 25 - 1
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- 10 - 1 and 5 - 1
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Knots tied in fiber rope reduce the strength by
approximately:
1. 10%
2. 25%
3. 35%
4. 50%
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- 50%
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An eye spliced In a fiber will reduce the rope strength by how much?
1. 50-60%
2. 30-40%
3. 15-20%
4. 5-10%
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- 15-20%
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The knot used in conjunction with the back splice to keep a rope from unraveling is:
1. bowline
2. clove
3. crown
4. reef
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- crown
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How many tucks are required (in total) for a back splice when using natural fibre rope?
1. 3
2. 6
3. 5
4. 10
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- 6
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Which splice is used when forming an eye in fiber rope?
1. side splice
2. short splice
3. long splice
4. bowline splice
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- side splice
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Which of the following is used to securely fasten a rope to a pipe?
1. reef knot
2. bowline
3. self centering bowline
4. clove hitch
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- clove hitch
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This knot is known as a “killer” knot because it Is often used Improperly.
1. bowline on the bight
2. spanish bowline
3. reef knot
4. becket hitch
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- reef knot
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What Is used to Join two ropes of equal diameter?
1. sheet bend
2. rolling hitch
3. becket hitch
4. carrlck bend
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- carrlck bend
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What is the efficiency of a clove hitch?
1. 25%
2. 50%
3. 75%
4. 100%
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- 75%
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In a multi-part fiber rope block system, what Is the reason for the hoisting rope to lead from a center sheave of the upper block?
1. less friction
2. won’t topple load as easily
3. keeps blocks from tilting
4. does not really make a difference
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- keeps blocks from tilting
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What is the accepted amount of friction per sheave In a multi-part fiber rope system?
1. 3%
2. 10%
3. 20%
4. 50%
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- 10%
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At what point does friction in a multi-part fiber rope system become greater than the theoretical mechanical advantage?
1. 5 parts of line
2. 8 parts of line
3. 12 parts of line
4. 20 parts of line
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- 8 parts of line
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