Question 1

List three ways in which human activity can increase the danger of landsliding.

Accepted Answer

Adding water,loading

Question 2

For a rockfall,what two factors lead to a greater distance of travel of the moving debris?

Accepted Answer

Greater height of fa

Question 3

Why do highway departments sometimes pile huge boulders near the base of a sloping road cut?

Accepted Answer

A)  to prevent gullying of the sloping road cut 
B)  to keep vegetation from growing on the sloping road cut 
C)  to prevent water from getting into the slope 
D)  to prevent slumping of the road cut by loading the toe of the potential slump 
E)  to prevent damage to the road cut from collisions with erratic drivers 
A)  to prevent gullying of the sloping road cut 
B)  to keep vegetation from growing on the sloping road cut 
C)  to prevent water from getting into the slope 
D)  to prevent slumping of the road cut by loading the toe of the potential slump 
E)  to prevent damage to the road cut from collisions with erratic drivers

Question 4

What is the difference between a slump and a translational slide?

Accepted Answer

A slump fails as a relatively

Question 5

What types of internal surfaces are most prone to sliding?

Accepted Answer

Planes sloping at gentler angl

Question 6

The main factors that affect the chance that a slope will fail in a landslide do NOT include:

Accepted Answer

A)  slope angle or steepness. 
B)  strength of slope material. 
C)  amount of water. 
D)  age of the slope. 
E)  internal surfaces subparallel to the slope. 
A)  slope angle or steepness. 
B)  strength of slope material. 
C)  amount of water. 
D)  age of the slope. 
E)  internal surfaces subparallel to the slope.

Question 7

What can be done to stabilize a steep,dangerous rock cliff or road cut to keep it from collapsing onto a highway or railroad track?

Accepted Answer

Insert rockbolts (sp

Question 8

What types of internal surfaces are LEAST prone to sliding?

Accepted Answer

A)  planes sloping at somewhat steeper angles than the slope 
B)  planes sloping at somewhat gentler angles than the slope 
C)  old landslide slip surfaces 
D)  daylighted surfaces 
E)  planes cemented by smectite 
A)  planes sloping at somewhat steeper angles than the slope 
B)  planes sloping at somewhat gentler angles than the slope 
C)  old landslide slip surfaces 
D)  daylighted surfaces 
E)  planes cemented by smectite

Question 9

What is "cohesion" as applied to slope failure?

Accepted Answer

A)  the condition of a slope that has not yet begun to slide 
B)  loose grains in a slope that are angular rather than rounded so they don't slip past one another easily 
C)  the holding together of otherwise loose grains on a slope, often by a little moisture 
D)  grains in a rock that have interlocked as a result of metamorphism 
E)  grains in a granite or similar rock that don't separate easily 
A)  the condition of a slope that has not yet begun to slide 
B)  loose grains in a slope that are angular rather than rounded so they don't slip past one another easily 
C)  the holding together of otherwise loose grains on a slope, often by a little moisture 
D)  grains in a rock that have interlocked as a result of metamorphism 
E)  grains in a granite or similar rock that don't separate easily

Question 10

Which of the following would NOT cause the height of water in the ground to rise,thus increasing the danger of sliding?

Accepted Answer

A)  leaking pipes 
B)  cracked swimming pools 
C)  septic drain fields 
D)  planting trees 
E)  filling a reservoir behind a dam 
A)  leaking pipes 
B)  cracked swimming pools 
C)  septic drain fields 
D)  planting trees 
E)  filling a reservoir behind a dam

Question 11

The angle of repose for dry sand is __________ degrees.

Accepted Answer

A)  5 to 15 
B)  25 to 35 
C)  45 to 55 
D)  35 to 45 
E)  15 to 25 
A)  5 to 15 
B)  25 to 35 
C)  45 to 55 
D)  35 to 45 
E)  15 to 25

Question 12

The disastrous Vaiont landslide in Italy involved what combination of circumstances?

Accepted Answer

Weak rock layers dipping paral

Question 13

Why does the top of a rotational slide tilt back into the slope?

Accepted Answer

A)  As the slide moves away from its head scarp, material slides back into the gap. 
B)  The slide mass rotates on a circular curving surface, so everything on it rotates backward. 
C)  The inertial pull of the fast-moving slide leaves a gap behind at the top. 
D)  Since the slide mass pulls away from the head scarp, it leaves a gap that tilts backward. 
E)  Since the top of the mass is pulled forward, the bottom tilts back, just as you would if you slipped on ice. 
A)  As the slide moves away from its head scarp, material slides back into the gap. 
B)  The slide mass rotates on a circular curving surface, so everything on it rotates backward. 
C)  The inertial pull of the fast-moving slide leaves a gap behind at the top. 
D)  Since the slide mass pulls away from the head scarp, it leaves a gap that tilts backward. 
E)  Since the top of the mass is pulled forward, the bottom tilts back, just as you would if you slipped on ice.

Question 14

What would make a pile of rounded sand grains collapse to be almost flat?

Accepted Answer

Too much water-enoug

Question 15

Describe what occurred during the Frank Slide in 1903.What type of downslope movement occurred here? Why do you think the rock material was able to travel so far?

Accepted Answer

30 million cubic meters of rock fell 762

List three ways in which human activity can increase the danger of landsliding.

For a rockfall,what two factors lead to a greater distance of travel of the moving debris?

Why do highway departments sometimes pile huge boulders near the base of a sloping road cut?

What is the difference between a slump and a translational slide?

What types of internal surfaces are most prone to sliding?

The main factors that affect the chance that a slope will fail in a landslide do NOT include:

What can be done to stabilize a steep,dangerous rock cliff or road cut to keep it from collapsing onto a highway or railroad track?

What types of internal surfaces are LEAST prone to sliding?

What is "cohesion" as applied to slope failure?

Which of the following would NOT cause the height of water in the ground to rise,thus increasing the danger of sliding?

The angle of repose for dry sand is __________ degrees.

The disastrous Vaiont landslide in Italy involved what combination of circumstances?

Why does the top of a rotational slide tilt back into the slope?

What would make a pile of rounded sand grains collapse to be almost flat?

Describe what occurred during the Frank Slide in 1903.What type of downslope movement occurred here? Why do you think the rock material was able to travel so far?

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Exam 8: Landslides and Other Downslope Movements

List three ways in which human activity can increase the danger of landsliding.

For a rockfall,what two factors lead to a greater distance of travel of the moving debris?

Why do highway departments sometimes pile huge boulders near the base of a sloping road cut?

What is the difference between a slump and a translational slide?

What types of internal surfaces are most prone to sliding?

The main factors that affect the chance that a slope will fail in a landslide do NOT include:

What can be done to stabilize a steep,dangerous rock cliff or road cut to keep it from collapsing onto a highway or railroad track?

What types of internal surfaces are LEAST prone to sliding?

What is "cohesion" as applied to slope failure?

Which of the following would NOT cause the height of water in the ground to rise,thus increasing the danger of sliding?

The angle of repose for dry sand is __________ degrees.

The disastrous Vaiont landslide in Italy involved what combination of circumstances?

Why does the top of a rotational slide tilt back into the slope?

What would make a pile of rounded sand grains collapse to be almost flat?

Describe what occurred during the Frank Slide in 1903.What type of downslope movement occurred here? Why do you think the rock material was able to travel so far?

Natural Hazards and Disasters

Plate Tectonics and Physical Hazards

Earthquakes and Their Causes

Earthquake Prediction and Mitigation

Tsunami

Volcanoes: Tectonic Environments and Eruptions

Volcanoes: Hazards and Mitigation

Sinkholes, Land Subsidence, and Swelling Soils

Weather, Thunderstorms, And Tornadoes

Climate Change

Streams And Flood Processes

Floods And Human Interactions

Waves,Beaches,And Coastal Erosion

Hurricanes and Nor’easters

Wildfires

Impact of Asteroids and Comets

The Future: Where Do We Go From Here?

Filters