Question 1

Slab avalanches move slowly and therefore are not very dangerous.

Accepted Answer

A) True 
 B)False

Question 2

Slopes less than 25 degrees and greater than 60 degrees have a low avalanche risk.

Accepted Answer

A) True 
 B)False

Question 3

How does a slab avalanche begin?

Accepted Answer

A slab avalanche beg

Question 4

The run-out zone is the part of the avalanche path along which the avalanche accelerates.

Accepted Answer

A) True 
 B)False

Question 5

If you were backcountry skiing and wanted to conduct a rutschblock test to assess the avalanche risk,what would you do?

Accepted Answer

A)  dig a hole one metre deep and examine the character of the snow layers 
B)  pull back the upper part of a column of snow with your shovel and observe the fractures produced 
C)  push on the snow with the back of your shovel and observe fractures on the exposed vertical face 
D)  push on the snow with your skis, then jump on it and assess the force necessary to set the snow in motion 
E)  throw a fist-sized rock or larger snowball at the slope you're testing and observe the resulting pattern 
A)  dig a hole one metre deep and examine the character of the snow layers 
B)  pull back the upper part of a column of snow with your shovel and observe the fractures produced 
C)  push on the snow with the back of your shovel and observe fractures on the exposed vertical face 
D)  push on the snow with your skis, then jump on it and assess the force necessary to set the snow in motion 
E)  throw a fist-sized rock or larger snowball at the slope you're testing and observe the resulting pattern

Question 6

What structures can be built in the start zone to decrease the avalanche hazard,and how do they work?

Accepted Answer

Fences or nets in the start zone can sup

Question 7

In the early 20th century,transportation-related activities accounted for most snow avalanche deaths.

Accepted Answer

A) True 
 B)False

Question 8

At which of the following slope angles is a point release avalanche most likely?

Accepted Answer

A)  20 degrees 
B)  30 degrees 
C)  40 degrees 
D)  50 degrees 
E)  60 degrees 
A)  20 degrees 
B)  30 degrees 
C)  40 degrees 
D)  50 degrees 
E)  60 degrees

Question 9

Very few dry avalanches occur on slopes less than 30 degrees.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following provides the most direct evidence of avalanche risk?

Accepted Answer

A)  weather observations 
B)  snowpack observations 
C)  snow stability tests 
D)  observations of recent avalanches 
E)  slope measurements 
A)  weather observations 
B)  snowpack observations 
C)  snow stability tests 
D)  observations of recent avalanches 
E)  slope measurements

Question 11

Which of the following is the most effective means to minimize snow avalanche risk to human infrastructure?

Accepted Answer

A)  Build deflecting structures to funnel the snow avalanches elsewhere. 
B)  Reinforce buildings on the side facing the avalanche hazard. 
C)  Trigger controlled avalanches with explosives to minimize surprises. 
D)  Develop programs to close roads and railways when avalanche danger is high. 
E)  Avoid placing human infrastructure in expected avalanche paths. 
A)  Build deflecting structures to funnel the snow avalanches elsewhere. 
B)  Reinforce buildings on the side facing the avalanche hazard. 
C)  Trigger controlled avalanches with explosives to minimize surprises. 
D)  Develop programs to close roads and railways when avalanche danger is high. 
E)  Avoid placing human infrastructure in expected avalanche paths.

Question 12

If you're snowshoeing in the backcountry with a group and one of your group is swept away and buried by an avalanche,what should you do first?

Accepted Answer

A)  call for professional help 
B)  conduct a search immediately to dig the person out 
C)  divide the group and have half go for help and the other half stay and wait 
D)  mark the spot and evacuate the rest of the group to safety 
E)  start a stove or build a fire to warm the victim once he/she is recovered 
A)  call for professional help 
B)  conduct a search immediately to dig the person out 
C)  divide the group and have half go for help and the other half stay and wait 
D)  mark the spot and evacuate the rest of the group to safety 
E)  start a stove or build a fire to warm the victim once he/she is recovered

Question 13

The west coasts of Northern Hemisphere continents get considerable snow cover to latitudes as low as 35 degrees.

Accepted Answer

A) True 
 B)False

Question 14

Avalanches are destructive and offer no environmental benefit to a region.

Accepted Answer

A) True 
 B)False

Question 15

Slab avalanches disintegrate into smaller fragments soon after failure.

Accepted Answer

A) True 
 B)False

Question 16

Why is there little snowfall on Antarctica?

Accepted Answer

The cold,polar air cannot hold

Question 17

Observations of past avalanches help forecast future avalanches under similar conditions.

Accepted Answer

A) True 
 B)False

Question 18

If caught in an avalanche,the chance of surviving burial at greater than 1.5 metres is

Accepted Answer

A)  almost zero. 
B)  2%. 
C)  5%. 
D)  5 - 10%. 
E)  10 - 20%. 
A)  almost zero. 
B)  2%. 
C)  5%. 
D)  5 - 10%. 
E)  10 - 20%.

Question 19

The motion of the snow itself kills about

Accepted Answer

A)  5 percent of avalanche victims. 
B)  10 percent of avalanche victims. 
C)  25 percent of avalanche victims. 
D)  40 percent of avalanche victims. 
E)  75 percent of avalanche victims. 
A)  5 percent of avalanche victims. 
B)  10 percent of avalanche victims. 
C)  25 percent of avalanche victims. 
D)  40 percent of avalanche victims. 
E)  75 percent of avalanche victims.

Question 20

In Canada,avalanches are rare in which region(s)?

Accepted Answer

A)  The Gaspe region of Quebec 
B)  The Prairies and the Arctic mainland 
C)  Labrador and the Arctic Islands 
D)  Alberta and British Columbia 
E)  Atlantic Canada 
A)  The Gaspe region of Quebec 
B)  The Prairies and the Arctic mainland 
C)  Labrador and the Arctic Islands 
D)  Alberta and British Columbia 
E)  Atlantic Canada

Slab avalanches move slowly and therefore are not very dangerous.

Slopes less than 25 degrees and greater than 60 degrees have a low avalanche risk.

How does a slab avalanche begin?

The run-out zone is the part of the avalanche path along which the avalanche accelerates.

If you were backcountry skiing and wanted to conduct a rutschblock test to assess the avalanche risk,what would you do?

What structures can be built in the start zone to decrease the avalanche hazard,and how do they work?

In the early 20th century,transportation-related activities accounted for most snow avalanche deaths.

At which of the following slope angles is a point release avalanche most likely?

Very few dry avalanches occur on slopes less than 30 degrees.

Which of the following provides the most direct evidence of avalanche risk?

Which of the following is the most effective means to minimize snow avalanche risk to human infrastructure?

If you're snowshoeing in the backcountry with a group and one of your group is swept away and buried by an avalanche,what should you do first?

The west coasts of Northern Hemisphere continents get considerable snow cover to latitudes as low as 35 degrees.

Avalanches are destructive and offer no environmental benefit to a region.

Slab avalanches disintegrate into smaller fragments soon after failure.

Why is there little snowfall on Antarctica?

Observations of past avalanches help forecast future avalanches under similar conditions.

If caught in an avalanche,the chance of surviving burial at greater than 1.5 metres is

The motion of the snow itself kills about

In Canada,avalanches are rare in which region(s)?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters

Exam 7: Snow Avalanches

Slab avalanches move slowly and therefore are not very dangerous.

Slopes less than 25 degrees and greater than 60 degrees have a low avalanche risk.

How does a slab avalanche begin?

The run-out zone is the part of the avalanche path along which the avalanche accelerates.

If you were backcountry skiing and wanted to conduct a rutschblock test to assess the avalanche risk,what would you do?

What structures can be built in the start zone to decrease the avalanche hazard,and how do they work?

In the early 20th century,transportation-related activities accounted for most snow avalanche deaths.

At which of the following slope angles is a point release avalanche most likely?

Very few dry avalanches occur on slopes less than 30 degrees.

Which of the following provides the most direct evidence of avalanche risk?

Which of the following is the most effective means to minimize snow avalanche risk to human infrastructure?

If you're snowshoeing in the backcountry with a group and one of your group is swept away and buried by an avalanche,what should you do first?

The west coasts of Northern Hemisphere continents get considerable snow cover to latitudes as low as 35 degrees.

Avalanches are destructive and offer no environmental benefit to a region.

Slab avalanches disintegrate into smaller fragments soon after failure.

Why is there little snowfall on Antarctica?

Observations of past avalanches help forecast future avalanches under similar conditions.

If caught in an avalanche,the chance of surviving burial at greater than 1.5 metres is

The motion of the snow itself kills about

In Canada,avalanches are rare in which region(s)?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters