Volume 3 Ropes And Knots

Question 1

One 300 foot low stretch 1/2 inch static kernmantle lifeline, white in color, with blue or red stripes running through it, stored in a red nylon bag is?

Answer 1

Main line

Question 2

One 300 foot low stretch 1/2 inch static kernmantle rope, orange in color, stored in an orange nylon bag is?

Answer 2

Safety/ belay line

Question 3

Size and length of accessory cord used to make LRH

Answer 3

8mm

20 ft in length

Question 4

Size and length of long and short prusik

Answer 4

8mm, 6 ft (red)

8mm, 5 ft (green)

Question 5

Length of blue 1” webbing

Answer 5

5ft

Question 6

Length of yellow 1” webbing

Answer 6

12 ft

Question 7

Length of red 1” webbing

Answer 7

20 ft

Question 8

Length of yellow multi loop webbing

Answer 8

3 ft

Question 9

The main line is connected to the _____ “D” ring. The belay / safety line is connected to the _____ “D” ring.

Answer 9

Waist

Chest

Question 10

Carabiners used in the LAFD rope rescue kits are steel “D” shaped carabiners, rated at ____ pounds.

Answer 10

9,000 lbs

Question 11

Rappelling or lowering operations over ___ feet a brake bar rack should be used, due to the twisting of the rope.

Answer 11

75 ft

Question 12

The welded eye, on one end of the break bar rack is used for attachment and is rated at _____ pounds.

Answer 12

10,000 lbs

Question 13

For a single person load (rappel or lower), start with ___ bars. For a two-person loads, start with ___bars.

Answer 13

4

5

Question 14

The minimum bars should never be less that ___ bars while using the break bar rack in any operation.

Answer 14

3 bars

Question 15

Pickets: Various patterns and configurations. Pickets should be ___ foot in length, ___ inch round steel stock preferred. The pickets should be pounded ___ feet into the ground, at a ___ degree angle, away from the object.

Answer 15

3 ft

1”

2 ft

15 degrees

Question 16

Rating of picket systems

Single picket
1-1
1-1-1
2-1
3-2-1

Answer 16

Single: 700 lbs

1-1: 1400 lbs

1-1-1: 1800 lbs

2-1: 2000 lbs

3-2-1: 4000 lbs

Question 17

1/2 inch KM-III static kernmantle rope is constructed of a tightly woven sheath (______), over a braided core (_______).

Answer 17

Mantle

Kern

Question 18

The high strength core (Kern) can carry up to ___% of the load with the cover (Mantle) designed primarily for protection against abrasion

Answer 18

90%

Question 19

1/2 KM-lll static Kern mantle rope is rated at ______ pounds and weighs ___ pounds per –100 feet, which meets or exceeds the NFPA 1995 standard for one and two - person rescues.

Answer 19

10,000 lbs

7 lbs

Question 20

To determine the safe working load of a rope, you divide the manufacturers rated tensile strength by the NFPA safety factor of 15. E.g. 10,000 - pound rope divided by 15 = ____ pound working load, which exceeds the NFPA standard of 600 pounds for a two-person rope.

Answer 20

666 lbs working load

Question 21

The webbing used by LAFD is 1 inch spiral weaved tubular and folded over flat webbing rated at ____ pounds.

Answer 21

4,000 lbs

Question 22

Rating of prusiks used by lafd?

Answer 22

3,630 lbs

Question 23

The LRH is designed for what 2 purposes?

Answer 23

1. To act as a shock absorber when the main or belay is shock loaded
2. To pass a knot through the system

Question 24

Size of abrasion guards?

Answer 24

18”

Question 25

To clean ropes, wash in cold water. Use a mild chemical free soap such as ________ , ________ or_________, in the wash cycle.

Answer 25

Lifeline cleaner

Ivory snow

Woolite

Question 26

The KM-III static kernmantle rope has a melting point of ___ degrees Fahrenheit.

Answer 26

450 degrees

Question 27

Approved markers for marking the lifeline ropes?

Answer 27

Carter MARKS- A LOT

Stanford SHARPIE

Binney- smith MAGIC MARKER

Question 28

The equipment line is 150’ of ___ diameter rope with a factory eye splice on one end and a crown splice or whipping on the other end. It has a _____ lb. breaking strength and its working load is _____ lb.

Answer 28

5/8”

13,000 lbs

2,600 lbs

Question 29

How to find the working load of a rope?

Answer 29

Take the breaking strength and divide that by the NFPA standard of 15.

Ex:

Question 30

When tying your Munter hitch for the LRH, there should be ___ - ___ “ of space between carabiners.

Answer 30

4 - 5”

Question 31

How many wraps are incorporated into the LRH.

Answer 31

3-6

Question 32

The equipment line, double braid construction has an inner core of braided polyester which carries ___ % of the load. The outer jacket is a multiplex polyester fiber (Dacron) within which ___ of the strands are blue. It is designed for abrasion resistance and good grip, wet or dry, with or without gloves.

Answer 32

80%

25%

Question 33

The 20 foot extension ladders use ___ inch line and the 35 foot extension ladders use ___ inch line

Answer 33

3/8”

5/8”

Question 34

A dropline ( drop bag ) is 150’ of ___ “ Dacron braided line with a snap device attached to one end.

Answer 34

5/16”

Question 35

A knot placed in a line decreases its working capacity.

Knot % of Loss.

Full strength, no knots ___ % loss

Eye Splice ___ % loss

Timber hitch; half hitch ___ % loss

Bowline; clove hitch ___ % loss

Square knot ___ % loss

Overhand knot ___ % loss

Answer 35

No knot- 0% loss

Eye splice- 10% loss

Timber hitch/ half hitch- 35% loss

Bowline/ clove hitch- 40% loss

Square knot- 50% loss

Overhand- 55% loss

Question 36

For safety, completed knot should have a minimum ___” tail.

Answer 36

18”