ASC Safety Equipment Usage & Risk Management 3 — Questions and Answers
Question 1: Which shovel blade material offers the best combination of strength and light weight for avalanche rescue?
- Plastic polymer
- Aluminum alloy (Correct answer)
- Stainless steel
- Carbon fiber composite
Correct answer: Aluminum alloy
Aluminum alloy shovels provide the optimal balance of light weight, durability, and strength needed for the rigorous digging required in avalanche rescue.
Question 2: The V-conveyor shoveling method is used in rescue because it:
- Requires only one rescuer and is faster than single-person digging
- Uses a chain of rescuers to move snow efficiently, significantly reducing excavation time (Correct answer)
- Eliminates the need for a probe by creating a wide search trench
- Keeps rescuers stationary to avoid triggering secondary avalanches
Correct answer: Uses a chain of rescuers to move snow efficiently, significantly reducing excavation time
The V-conveyor (or assembly line) method positions multiple rescuers in a chain so snow is passed back rapidly, cutting excavation time compared to single-rescuer digging.
Question 3: In multi-burial scenarios, what is the recommended triage approach when using transceivers?
- Search for the deepest burial first since they are in greatest danger
- Use the transceiver to mark and systematically work through all signals, prioritizing the shallowest burial (Correct answer)
- Switch all transceivers to transmit and call for helicopter evacuation immediately
- Probe the entire debris field before beginning any transceiver search
Correct answer: Use the transceiver to mark and systematically work through all signals, prioritizing the shallowest burial
In multi-burial, rescuers should mark each signal and prioritize the shallowest burial because it is fastest to excavate, maximizing overall survival rates.
Question 4: What is the purpose of the 'strategic retreat' concept in avalanche risk management?
- Retreating to a lower elevation to avoid wind-loaded slopes
- Identifying and moving to a safe zone before, during, or after an avalanche releases (Correct answer)
- Retreating from a rescue scene if a victim cannot be found within 15 minutes
- Changing route plans only after an avalanche has already occurred
Correct answer: Identifying and moving to a safe zone before, during, or after an avalanche releases
Strategic retreat means proactively identifying safe zones and moving to them when avalanche risk is identified, preventing exposure before a slide occurs.
Question 5: What happens to avalanche survival probability after approximately 15 minutes of burial?
- It remains above 90% for most healthy adults
- It drops sharply due to asphyxiation as the air pocket CO2 increases (Correct answer)
- It is unaffected because snow provides sufficient oxygen diffusion
- It increases briefly as the snowpack settles around the victim
Correct answer: It drops sharply due to asphyxiation as the air pocket CO2 increases
Survival probability drops sharply after about 15 minutes because the air pocket fills with exhaled CO2, leading to asphyxiation—the primary cause of avalanche fatality.
Question 6: Which condition makes an avalanche airbag LEAST effective at keeping a rider near the surface?
- Wet, heavy spring snow avalanches (Correct answer)
- Dry, cold powder avalanches
- Wind slab avalanches on north-facing slopes
- Storm slab avalanches with new snow
Correct answer: Wet, heavy spring snow avalanches
Wet, dense avalanches behave more like fluid concrete and reduce the effectiveness of the inverse segregation effect that airbags rely on, making deployment less reliable.
Question 7: What is the correct procedure if your probe strikes a hard object (rock or ice) while searching for a buried victim?
- Mark the location as a confirmed burial and begin digging immediately
- Record the strike, flag the spot, and continue probing nearby to distinguish a victim from terrain features (Correct answer)
- Immediately stop probing to avoid injuring the victim with repeated strikes
- Switch the transceiver to transmit to alert other rescuers
Correct answer: Record the strike, flag the spot, and continue probing nearby to distinguish a victim from terrain features
A hard object may be rock or ice, so rescuers should flag the location and probe adjacent spots to confirm a victim by feel (soft, yielding resistance) before digging.
ASC Safety Equipment Usage & Risk Management 3
Which shovel blade material offers the best combination of strength and light weight for avalanche rescue?