RBT EB Flashcards
What is the efficiency loss of a figure 8 on a bight?
20%
What is the efficiency loss of a double loop figure 8?
18%
What is the efficiency loss of an Alpine Butterfly knot?
25%
What is the efficiency loss of a Water knot?
36%
What is the minimum tensile strength of 7mm accessory cord?
2200 lbs
How much strength does nylon rope lose when wet?
10-15%
How is the 15:1 safety factor calculated
9000 lb min tensile strength divided by a 600 lb (2x300lb people) safe work load.
What is the efficiency loss of a double fisherman’s knot (prusik knot)
21%
Kern mantle strength breakdown
85% kern 15% mantle
What is the strength of 1” tubular webbing end to end.
4000 lbs
What is the Rescue 8 minimum tensile strength?
9000 lbs
What is the CMC Steel Rescue 8 actual rating?
45,000 lbs
What is the Pick Straps minimum Strength rating end to end?
5000 lbs
What is the Pick Straps minimum Strength rating doubled?
9000 lbs
What is the Anchor Straps minimum Strength rating end to end?
5000 lbs
What is the Anchor Straps minimum Strength rating doubled?
9000 lbs
Steel D-ring min tensile strength?
5000 lbs
What is the minimum tensile strength for 2” flat weave webbing?
9000 lbs
What is the minimum rating for ascending and rope grab devices?
2400 lbs
What is the rating of 1” tubular webbing looped and doubled?
12,000 lbs
What is the efficiency loss of a bowline know?
27 - 33%
What is the minimum tensile rating for a cmc steel carabiner?
9000 lbs
What three primary principles do rescue riggers need to balance?
Safety, Efficiency & Effective
In what order should rope system anchors be selected?
Bombproof, Backed-up Bombproof, Load Sharing
In order to complete a proper rescue knot what three things need to be done.
Dress, Set, Safety
what must happen in order for a knot to maintain 100% of the ropes strength
The rope can have no bends smaller than 4 time it’s own diameter.
What is the minimum number of bars that should be used with the rappel rack?
Four Bars
What are the two general categories of Mechanical Advantage systems?
Simple and Compound
How far shall the general public be kept away from Air 1 for operations?
100 feet
How far should HFD personnel stay from AIR 1 unless performing duties?
50 feet
What land mark should a member not go above when entering and exiting Air 1.
The top of the passenger doors
What is considered a severe impact load to a mission or drill rope.
a fall 5’ or more with a one person load.
what is the maximum lifespan for life safety rope?
10 years
What is the minimum tensile strength of a CMC 8mm accessory cord?
3,500lbs
