EOSC 114 LANDSLIDES EXAM QUESTIONS WITH 100% CORRECT ANSWERS
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EOSC 114 LANDSLIDES
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EOSC 114 LANDSLIDES
EOSC 114 LANDSLIDES EXAM QUESTIONS WITH 100% CORRECT ANSWERS
Which of the following does NOT increase the likelihood of a landslide in British Columbia?
A wave action
B heavy winter rains
C frequent earthquakes
D highway construction through mountainous areas
E quick clays - Answer- ...
EOSC 114 LANDSLIDES EXAM
QUESTIONS WITH 100%
CORRECT ANSWERS
Which of the following does NOT increase the likelihood of a landslide in British
Columbia?
A wave action
B heavy winter rains
C frequent earthquakes
D highway construction through mountainous areas
E quick clays - Answer- E - heavy rain on quick clays increase landslide, quick clays by
themselves dont
Which statement is FALSE?
A The high frequency of landslide triggers in British Columbia pushes the factor of
safety to an unsafe number.
B One of the underlying causes of the landslide at Frank, Alberta was coal mining.
C The most common landslide trigger in western British Columbia is heavy
precipitation.
D Landslide frequency in western Canada is equal or less than frequencies in other
mountainous and landslide-prone areas around the world.
E An important part of earthquake safety preparedness in BC is landslide safety
preparedness. - Answer- D
Suppose you are a geological engineer retained to increase the slope stability in steep
portions of a mountainside along a busy highway. Which technique would you use to
reduce hazards from falling small blocky material?
remove all unstable blocks
plant trees
use cables and bolts to anchor the mass
install drains
install netting - Answer- install netting
Frictional resistance = effective stress x tan(x) = normal stress - pore water pressure -
Answer- related to all of these
, Tensioning a rock anchor helps to stabilize a slope by - Answer- increasing normal
stress --> increasing frictional strength
Which statement about causes and triggers of landslides is TRUE?
A There can be many triggers for one event.
B There is usually one cause for a landslide event.
C Causes can trigger landslides in some situations.
D Triggers develop instability in a slope.
E Causes are always short-lived events. - Answer- C
Increased vulnerability to landslide hazards may result from all the following EXCEPT
______.
use of marginal land
increasing population density
global warming
rapid land-use change
slope stabilization - Answer- slope stabilization
Liquefaction occurs when ______. - Answer- vibrations increase water pressure,
allowing water to flow which weakens the soil
Trigger frequency is ______.
how often landslides occur
the speed of a sturzstrom
how often an event occurs that sets off a landslide
the prevalence of heavy rain in a landslide-prone region
the period of time between earthquakes - Answer- how often an event occurs
How are landslides classified - Answer- 1. velocity
2. types of movement
Why do we study landslides - Answer- - infrustracture damage and can trigger
secondary disasters
**Explain how the impact of landslides depends on the affected area's population
density, economic infrastructure, and population preparedness. - Answer-
When is our vulnerability to landslides increased - Answer- - impact fo landslides is
increased by
- increasing population density --> higher the density, the more lives lost
- use of marginal land
- rapid land-use change
- global warming.
What type of consequences cause the most devastating landslide disasters - Answer-
landslide disasters with both direct and indirect consequences
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