ropes

Question 1

mechanical advantage

Answer 1

the ratio of the force applied to the load compared to the force applied to the input of the system

Question 2

high line tensioning formula

Answer 2

(span x load)/(4x sag)

Question 3

11mm high line, want __ sag

Answer 3

10%

Question 4

7mm (9/32) cord

Answer 4

10kn

Question 5

8mm (5/16) cord

Answer 5

3000lbs

15kn

Question 6

11mm (7/16) rope

Answer 6

30kn

Question 7

13mm (1/2) rope

Answer 7

40kn

Question 8

aluminum carabiner
L rated
G rated

Answer 8

L rated: 27kn

G rated; 40KN

Question 9

steel caribiner

Answer 9

40kn

Question 10

pulley

Answer 10

36kn

Question 11

scarab

Answer 11

rope breaks at 26kn

Question 12

25mm tubular webbing

Answer 12

18kn

Question 13

25mm flat webbing

Answer 13

26kn

Question 14

w2p1 tub

Answer 14

25kn

Question 15

w3p2 tub

Answer 15

36kn

Question 16

radium release

Answer 16

35 kn

Question 17

tandem prussik

Answer 17

clutch at 10-14kn

Question 18

single prussik

Answer 18

clutch at 9-13kn

Question 19

ABCDE safety check

Answer 19

anchors, belay, carabiners, Decent Control Device, edge,

Question 20

fall factor

Answer 20

length of the fall divided by the amount of rope between the rescuer, the anchor/ belayer. 2.0= 20ft fall with 10’ of rope to the anchor

Question 21

deceleration forces greater than ___ begin to produce spinal injuries

Answer 21

12kn

Question 22

don’t exceed a ___ fall factor

Answer 22

0.3 falling 1m on 3m of rope

Question 23

kern

Answer 23

core

Question 24

mantle

Answer 24

sheath

Question 25

5/8 (16mm) rope

Answer 25

57kn

Question 26

minimum breaking strength for rope in one/two system

Answer 26

4,500 9,000 10:1 safety factor

Question 27

12 things to check on a rope

Answer 27

unusual wear, cuts, exposed core, excessive wear on sheath, discoloration, burn marks, soft spots, kinks, bulges, inconsistent texture and flexibility, unequal thickness, excessive dirt

Question 28

ropes should be retired | 6 things

Answer 28

- excessive wear to sheath - when more than half of the outer sheath yarns are broken in one place - after severe shock - contaminated by chems - worn out from use or age - after 5yrs of service life

Question 29

1/2" rope should use ___ pussik cord

Answer 29

8mm

Question 30

test for pussiks on rope

Answer 30

pinch test: pinch pussik, more than cord dia space, too stiff

Question 31

triangular screw links

Answer 31

10,000lbs | 45kn

Question 32

break bar: ___ bars should be used for single person

Answer 32

4

Question 33

540 rescue belay

Answer 33

70kn

Question 34

break rack

Answer 34

45+

Question 35

knots: leave ___ of tail

Answer 35

1.5-2"

Question 36

rescue knots are: | 6 things

Answer 36

easy to tie and ID will not work loose on their own minimally reduce strengtht easy to untie untied before storage

Question 37

bowline requires a safety knot. T/F

Answer 37

T

Question 38

water knot needs ___ tail

Answer 38

1"

Question 39

RRH is made up of

Answer 39

10m of 8mm cord and 2 biners

Question 40

Personal pussiks use two wraps ___ and three wraps on ___

Answer 40

foot prussiks | short chest prussik

Question 41

order of personal prussiks on rope from top to bottom

Answer 41

short, long, medium

Question 42

single picket 1-1-1 3-2-1

Answer 42

700lbf 1,800 4,000

Question 43

pickets are driven in ___ ft at ___ angle __ft apart with a ____ ft webbing

Answer 43

2 stable, 3 unstable 15 3 20

Question 44

simple pulley system

Answer 44

one rope with all pulleys travel at the same speed

Question 45

compound pulley system

Answer 45

one simple system working on another simple system

Question 46

complex pulley system

Answer 46

not simple or compound | ex: spanish burton

Question 47

static system safety factor | 3 things to remember

Answer 47

10:1 material strength (1/3 lost due to knots) vector angles amount of load

Question 48

with load at center-span, max for on highline is a multiple of -is 1/2" rope

Answer 48

12 | 18

Question 49

bailout hook and rope rating

Answer 49

hook: 13.5kn rope: 17.4kn 3,900lbs