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LOW ANGLE ROPE RESCUE (LARRO) EXAM WITH COMPLETE
SOLUTIONS 1 00 % VERIFIED!!
Low-angle rope rescue An environment in which the on-rope rescuers are predominately supported by the rescuers themselves and not the rope rescue system.
High angle rope rescue An environment in which the on rope rescuers are predominantly supported by the rope rescue system.
Vectors Snakes, spiders, and ticks.
Core The kern in kern mantle is in reference to what?
The kern, or core Continuous parallel fibers throughout the length of the rope.
The sheath or the braided jacket. Mantle in kernmantle refers to what?
Half of the strands have a left twist, the other half has a right twist. This eliminates twist when loaded. How does the mantle assembly?
Protects the kern, or the core. What is the mantles function?
10-25% of the ropes strength The kern contributes _________ of its strength
High stretch (dynamic) Low Stretch Static The 3 types of rope
Dynamic High stretch rope is also referred to as _________
10 440 High stretch rope has greater than ___% stretch at ____pounds force.
60 High stretch rope may stretch to what % at breaking strength?
Recreational climbing What is high stretch (dynamic) used for?
Elongation Low stretch rope has slightly more ____________ than traditional static ropes
Synthetic nylon What material are our static kernmantle ropes made of?
Lighter Stronger More resistant to decay than natural fibers What are some advantages of the nylon synthetic material in rope?
15
Yes when dried. Synthetic nylon rope loses what % of its rated strength? And does it regain that strength.
40 kN or 8,992 lbs What is the minimum breaking strength of 1/2" static kernmantle?
1983 NFPA____ is the standard on fire service life safety rope and system components.
two person load (general use) 1/2" static kernmantle is rated for
Standard front loading washing machine, should be in a dive bag or coiled, by hand in an open tub or commercial rope washer cold water
Not to use strong detergents
Ensure rope is completely aire dried before storing in rope bag How to clean rope?
10 years What is the maximum life span for a lifeline per ASTM standard F-1740?
5 years What is a common standard for the life span of a lifeline among most rope manufacturers and rescue teams?
Excessive sheath wear More than half of outer sheath yarns broken in one pique After a severe shock force from a fall After being stressed beyond what it was designed to hold Contaminated by chemicals Worn out from use or age Use cannot be accounted for When should life safety rope be taken out of service?
Rope Log Where is information regarding rope recorded?
What length is green webbing?
12' What length is yellow webbing?
15' What length is blue webbing?
20' What length is orange webbing?
6000 lbs What is the strength of 1" flat nylon webbing?
4,000 lbs What is the strength of 1" tubular nylon webbing?
Load releasing device What does LRD stand for?
LRD What is used to transfer the load from the belay/safety line back to the main line?
LRD What can be used for changing over from a raising system to a lowering system or from a lowering to a raising system?
55" long What width is the webbing on the LRD and how long? 45 kN or 10,120 lbf What is the minimum breaking strength of the LRD? Class I What class of harness fastens around the waist, thighs, or under the buttocks and is designed to be used for emergency escapes with one person loads? Class II harness Class III harness Victim harness Class II What class of harness is fastened around the waist and thighs or under the buttocks and is designed rescue where two person loads can be encountered?
Class III What class of harness is fastened around the waist, thighs, or under the buttocks and over the shoulders and is designed for where two person loads can be encountered? Can be a one or two piece model.
Victim harness Which harness goes on quickly and securely around the waist and thighs or under the buttocks regardless of the position or location of the victim? The harness is designed to be placed on the without having the victim step into it
Operating outside of the normal limits of shock loads, fall loads, or abuse. When do you take a harness out of service?
What are some of the advantages in using a brake bar?
22 kN or 4,946 lbf What is the minimum breaking strength of the brake bar?
Deformed or cracked When 15% or more of the original diameter of aluminum bars is worn away Dropped from head height When do you retire a brake bar?
Clipping into a seat harness with a carabiner What is the small ring (lower one) on a figure 8 plate used for?
Create friction What is the large ring (top one) on a figure 8 plate used for?
Limited friction Once loaded, cannot add more friction to the device Whats a disadvantage of the figure 8 plate with ears?
22 kN or 4,946 lbf What is the minimum breaking strength of a figure 8 plate?
Broken or cracked When 15% or more of the original diameter of the aluminum bar is worn away Dropped from more than head height When do you retire a figure 8 plate?
- Axle
- Bearing
- Sheave
- Side plates
- Axle
36 kN or 8,093 lbf What is the minimum breaking strength of a pulley?
Sheave diameter
1 (1/2)" - 4" What does a pulley size depend on? What is the size range?
- Cam
- Shell
- Pin Ascender Haul cam What is the mechanical grab device used as? Anchor point attachment What is the large opening on an anchor plate used for? System Hardware attachment What are the smaller openings on an anchor plate used for? 36 kN or 8,093 lbf What is the minimum breaking strength of the anchor plate? Canvas
How does one set a knot?
Setting a knot
6" Minimum length of tail on figure eight knots and bends in a lifeline
2" Minimum length of tail on double overhand on a bight in lifeline.
2" Minimum tail length on overhand knots and bends in webbing
2" Minimum tail length for half hitches in webbing or rope
1" Minimum tail length for double overhand bend in prusik cordage
- Figure 8 stopper
- Figure 8 on a bight
- Overhand
- Overhand bend (water knot)
- Round turn with 2 half hitches
- Three wrap prusik hitch
- Figure 8 follow through
- Figure 8 bend
- Double overhand bend
- Clove
- Double overhand on a bight
- Tensionless hitch
4- How many wraps do you use for a tensionless hitch?
That anchors be capable of supporting at least 5,000 lbs per employee attached OR must be designed, installed, and used as part of a complete fall arrest system that maintains a safety factor of at least two In regard to personal fall arrest systems, what does CCR Title 8 Section 1670 state?
A directional anchor will fail if load shifts to an unintended direction of pull Difference between non directional and directional anchor.
Key removed Tagged out Set brake and chock wheels What are some considerations if using a vehicle as an anchor?
15 degrees away from the load What angle should pickets be driven in at?
Single Loop girth hitch (Lark's Foot)
The system will allow for some change of direction in the force applied to the anchors
The amount of force from the load is distributed to each of the anchor points What does self-adjust mean in reference to self adjusting anchors?
Between 45 and 90 degrees What does most agencies define the critical angle as? Three point self adjusting anchor system 90 degrees Critical angle? Windlassed picket system What can you use if no anchor is readily available? Over 5,000 lbs holding power When used in configurations of three pickets in hard compact soil, what the windless picket system rated at? 700 lbs What is a single picket rated at? 48" long 1" cold rolled steel What are the specifications for the pickets? 24"-36" into the soil
How far down in the dirt should the pickets be driven?
One picket length How much space between pickets?
In a line straight In what pattern should pickets be placed?
With either a clove hitch or round turn two half hitches When initiating a windlass picket system, how should you attach the webbing to the front picket?
two 20' pieces tied together What length webbing would you use to connect two pickets?
4 With webbing, how many wraps is the minimum to retain two pickets? Until the front picket starts to move For how long do you tension the pickets? Rear windlass In an in line picket system what is the first windlass to tension and lock? Use triangle windlass picket system In a windlass picket system what is done if anticipating changes in the load? Blue 15' What webbing do you use to form a hasty pelvic harness?
2 20'
Main line Which line carries the load in all rappel, lower and raise operations? This line also will convert into part of the mechanical advantage or haul system.
R stands for resistance P stands for pulley M=mariners hitch What does RPM stand for
LRD Two caribiners One long prusik One short prusik What is the minimum equipment for the belay/safety component?
Inform the belay/safety line tender how much line and at what speed is needed to accommodate the rescuers needs. Rope rescue operations are a go ONLY when the edge position is filled What does the "edge" person do?
Prusik minding pulley What does PMP stand for?
2"-3" When rappelling on the safety line, how much slack do you want? 4 for 1 person 5 for 2 people
How many bars do you need reeved on the brake bar for 1 person? 2 people? Vector pull What do you call it when a rescuer assists the rappellers transition over the edge by pulling on the line between the rappeller and the anchor to remove any slack and provide tension? Detect the victims Locate the victims Assess the victims Stabilize Transport What does D.L.A.S.T stand for?
All anchor components All belay systems components All main line components Rescuer/victim packaging What are the safety checks done prior to operation of a rope system?
A member of the crew who has NOT constructed that component Who has to perform the safety check?
On belay What does the edge person say to the belay/safety line tender before lowering?
Belay on How does the belay/safety line tender respond to the edge person after hearing on belay?
