ASC Avalanche Forecasting & Danger Ratings 2

Question 1

Which avalanche problem type is associated with a weak layer buried deep in the snowpack that persists for weeks or months?

Accepted Answer

Persistent Slab

Answer

Persistent Slab problems involve a weak layer buried beneath one or more strong snow layers that can remain reactive for an extended period.

Question 2

A 'Storm Slab' avalanche problem is most likely to occur during which period?

Accepted Answer

During or shortly after a significant snowstorm

Answer

Storm Slab avalanche problems develop during or shortly after heavy snowfall when new snow bonds poorly with the surface beneath it.

Question 3

What characteristic best describes a 'Wind Slab' avalanche problem?

Accepted Answer

Dense, stiff slabs deposited by wind on lee aspects and cross-loaded ridges

Answer

Wind Slabs form when wind transports snow and deposits it as dense, cohesive slabs on lee aspects, cross-loaded ridges, and terrain features downwind of the prevailing wind.

Question 4

The 'Wet Slab' avalanche problem is most commonly associated with which triggering mechanism?

Accepted Answer

Rapid warming, rain, or solar radiation that introduces liquid water into the snowpack

Answer

Wet Slab problems are driven by liquid water infiltrating the snowpack, reducing friction between snow layers and triggering large, heavy avalanches.

Question 5

Which of the following best describes a 'Loose Snow' (or 'Point Release') avalanche?

Accepted Answer

An avalanche that starts from a single point and fans outward, involving cohesionless snow

Answer

Loose Snow avalanches start from a single point and fan outward downslope, typically involving dry, unconsolidated snow or wet surface snow.

(ASC) Avalanche Safety Certification Practice Test

(ASC) Avalanche Safety Certification Practice Test

ASC Avalanche Forecasting & Danger Ratings 2