RBT EB Flashcards

1
Q

What is the efficiency loss of a figure 8 on a bight?

A

20%

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2
Q

What is the efficiency loss of a double loop figure 8?

A

18%

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3
Q

What is the efficiency loss of an Alpine Butterfly knot?

A

25%

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4
Q

What is the efficiency loss of a Water knot?

A

36%

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5
Q

What is the minimum tensile strength of 7mm accessory cord?

A

2200 lbs

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6
Q

How much strength does nylon rope lose when wet?

A

10-15%

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7
Q

How is the 15:1 safety factor calculated

A

9000 lb min tensile strength divided by a 600 lb (2x300lb people) safe work load.

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8
Q

What is the efficiency loss of a double fisherman’s knot (prusik knot)

A

21%

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9
Q

Kern mantle strength breakdown

A

85% kern 15% mantle

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10
Q

What is the strength of 1” tubular webbing end to end.

A

4000 lbs

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11
Q

What is the Rescue 8 minimum tensile strength?

A

9000 lbs

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12
Q

What is the CMC Steel Rescue 8 actual rating?

A

45,000 lbs

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13
Q

What is the Pick Straps minimum Strength rating end to end?

A

5000 lbs

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14
Q

What is the Pick Straps minimum Strength rating doubled?

A

9000 lbs

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15
Q

What is the Anchor Straps minimum Strength rating end to end?

A

5000 lbs

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16
Q

What is the Anchor Straps minimum Strength rating doubled?

A

9000 lbs

17
Q

Steel D-ring min tensile strength?

A

5000 lbs

18
Q

What is the minimum tensile strength for 2” flat weave webbing?

A

9000 lbs

19
Q

What is the minimum rating for ascending and rope grab devices?

A

2400 lbs

20
Q

What is the rating of 1” tubular webbing looped and doubled?

A

12,000 lbs

21
Q

What is the efficiency loss of a bowline know?

A

27 - 33%

22
Q

What is the minimum tensile rating for a cmc steel carabiner?

A

9000 lbs

23
Q

What three primary principles do rescue riggers need to balance?

A

Safety, Efficiency & Effective

24
Q

In what order should rope system anchors be selected?

A

Bombproof, Backed-up Bombproof, Load Sharing

25
Q

In order to complete a proper rescue knot what three things need to be done.

A

Dress, Set, Safety

26
Q

what must happen in order for a knot to maintain 100% of the ropes strength

A

The rope can have no bends smaller than 4 time it’s own diameter.

27
Q

What is the minimum number of bars that should be used with the rappel rack?

A

Four Bars

28
Q

What are the two general categories of Mechanical Advantage systems?

A

Simple and Compound

29
Q

How far shall the general public be kept away from Air 1 for operations?

A

100 feet

30
Q

How far should HFD personnel stay from AIR 1 unless performing duties?

A

50 feet

31
Q

What land mark should a member not go above when entering and exiting Air 1.

A

The top of the passenger doors

32
Q

What is considered a severe impact load to a mission or drill rope.

A

a fall 5’ or more with a one person load.

33
Q

what is the maximum lifespan for life safety rope?

A

10 years

34
Q

What is the minimum tensile strength of a CMC 8mm accessory cord?

A

3,500lbs