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Module B (Quizlet) 2
Technical Escort - Confined Space Operations
Question | Answer |
---|---|
What are the limitations of a large locking D carabiner? | Over 10,000 lbf minimum braking strength (major axis gate closed) |
Descender Rack (break bar) definition | A friction or mechanical device utilized with rope to control descent |
Descender Rack (break bar) limitations | 4 bars for one person and 6 bars for two people |
Figure 8 plate limitations | Limit use for one person loads and minimum breaking strength well over 6,000 lbf |
What is the NFPA classification for "Ascending Devices"? | Loads up to 300 lbs |
What is the NFPA classification for "Grab Devices"? | Loads over 300 to 600 lbs |
What is a soft rope grab? | A rope on rope safety aka Prusik Hitch |
Mechanical rope grab defintion | A rope safety constructed from aircraft alloys or stainless stell |
Benefits of pulley use | Reduces rope friction, develop mechanical advantage in rope/pulley hauling systems and redirects path of a rope |
What is the minimum breaking strength for Prusik Minding Pulleys(PMPs)? | 8,000 lbf and 10,000 lbf |
Rigging definition | The assembly of rope, webbing, and hardware used to form anchoring and associated rope rescue systems |
Carabiner (D-ring) limitations | Minor axis is 2,400 lbf, major axis with gate open is 2,400 lbf and major axis with gate closed is 9,000 lbf |
Bombproof definition | Anchor points that are so strong, that if they were to fail, it would be due to a catastrophic event, examples are tsunami or hurricane |
What are the two multiple-point anchor system classifications? | Load sharing anchor systems or load distributing (load equalizing) anchor systems |
Load sharing anchor system example | Environmental structures, examples are are trees |
Load distributing (or load-equalizing) anchor systems example | Urbanized or industrial structures |
What are the left and right limits of the Critical angle | Minimum is 60 degrees, maximum is 120 degrees, and last resort is 150 degrees (not recommended) |
What is the general rigging precaution when inspecting ropes? | When in doubt, throw it out |
Does strength of the anchor point increase, decrease or stay the same with an increase in the amount of pulls? | The strength increase due to only losing strength once with the ring bend |
Tandem Prusik Belay System definition | This system is unconditional, and works by attaching an anchored belay device to a separate rope which is also attached to the load. Should anything go wrong with the primary system, the belay device will operate to arrest the fall |