Rope

Question 1

Static kernmantle

Answer 1

• core has parallel bundle construction
• elongation : normally 1% min - 10% max of 10% of rated breaking strength
• NFPA 1983
• department uses static
• 1/2” diameter
• minimum breaking strength 9000lbs
• max working load is 600lbs
• weighs 7lbs per 100 ft
• we carry 150ft

Question 2

Dynamic

Answer 2

• core has twisted bundle construction
  Used for climbing and training only
• “tight” weave = better abrasion , harder to tie knots
  -“loose” weave = easy knot tying but less abrasion resistance

Question 3

Nylon webbing

Answer 3

Red - used only for class 3 rappelling harness ( Hansen harness )

Blue - utility purposes only

• construction of continuous nylon fibers woven in a spiral weave to produce tubular shape
• minimum breaking strength of 4000lbs

Question 4

TFD ropes are used for :

Answer 4

• high angle rescue
• swift water rescue
• confined space rescue
• utility purpose
• life safety

Question 5

Damage to rope

Answer 5

Kernmantle:

• will yellow after 5 hours of 300 degree
• gets sticky at 445 degree
• melts at 480 degree
• water weakens 10-15% but recovers when dry

Question 6

Inspecting rope

Answer 6

• quarterly
• after each use
• discoloration
• glossy marks
• cuts / tears
• obvious change in diameter
• fraying
• chemical contamination

Question 7

Carabiners

Answer 7

• aluminum rated at 6000lbs ( personal load 300lbs)
• steel rated at 9000lbs ( rescue load 600lbs)
• figure 8 descenders same specs as carabiners

Question 8

Rope

Answer 8

• kernmantle rope
• 100% nylon
• static / dynamic
• kern = 75% of strength
• mantle =25% of strength

Question 9

Overhand knot and double overhand

Answer 9

• stopper knot or back up knot

Question 10

Slip knot

Answer 10

Used to draw down on something

Question 11

Square knot

Answer 11

Connects 2 ropes of equal diameter

Loses 50%

Question 12

Family of 8’s

Answer 12

• figure 8 , stopper knot
• figure 8 on bight , anchoring
• figure 8 follow , anchoring

All lose 20%

Rescue 8

Question 13

Bow lines

Answer 13

• bowline , anchoring
• bowline on night , rescue knot
• running bowline , tighten down on object

All lose 33%

Question 14

Butterfly knot

Answer 14

• used to make a knot in middle of a loaded rope

Loses 30%

Question 15

Hitches

Answer 15

Half hitch
Clove hitch
Munter hitch

• secures line to object

Question 16

Bends

Answer 16

Becker bend , ties 2 ropes of unequal diameter
- loses 50%

Water bend

• used to tie ends of webbing
• not used on rope