RBT EB

Question 1

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

Answer 1

20%

Question 2

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

Answer 2

18%

Question 3

What is the efficiency loss of an Alpine Butterfly knot?

Answer 3

25%

Question 4

What is the efficiency loss of a Water knot?

Answer 4

36%

Question 5

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

Answer 5

2200 lbs

Question 6

How much strength does nylon rope lose when wet?

Answer 6

10-15%

Question 7

How is the 15:1 safety factor calculated

Answer 7

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

Question 8

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

Answer 8

21%

Question 9

Kern mantle strength breakdown

Answer 9

85% kern 15% mantle

Question 10

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

Answer 10

4000 lbs

Question 11

What is the Rescue 8 minimum tensile strength?

Answer 11

9000 lbs

Question 12

What is the CMC Steel Rescue 8 actual rating?

Answer 12

45,000 lbs

Question 13

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

Answer 13

5000 lbs

Question 14

What is the Pick Straps minimum Strength rating doubled?

Answer 14

9000 lbs

Question 15

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

Answer 15

5000 lbs

Question 16

What is the Anchor Straps minimum Strength rating doubled?

Answer 16

9000 lbs

Question 17

Steel D-ring min tensile strength?

Answer 17

5000 lbs

Question 18

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

Answer 18

9000 lbs

Question 19

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

Answer 19

2400 lbs

Question 20

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

Answer 20

12,000 lbs

Question 21

What is the efficiency loss of a bowline know?

Answer 21

27 - 33%

Question 22

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

Answer 22

9000 lbs

Question 23

What three primary principles do rescue riggers need to balance?

Answer 23

Safety, Efficiency & Effective

Question 24

In what order should rope system anchors be selected?

Answer 24

Bombproof, Backed-up Bombproof, Load Sharing

Question 25

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

Answer 25

Dress, Set, Safety

Question 26

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

Answer 26

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

Question 27

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

Answer 27

Four Bars

Question 28

What are the two general categories of Mechanical Advantage systems?

Answer 28

Simple and Compound

Question 29

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

Answer 29

100 feet

Question 30

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

Answer 30

50 feet

Question 31

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

Answer 31

The top of the passenger doors

Question 32

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

Answer 32

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

Question 33

what is the maximum lifespan for life safety rope?

Answer 33

10 years

Question 34

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

Answer 34

3,500lbs