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Multiple Choice Quiz
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1
What is the fastest type of mass wasting process?
A)rotational slump
B)creep
C)rock avalanche
D)debris flow
2
Any unconsolidated material at the Earth's surface of any size is called:
A)soil.
B)scree.
C)talus.
D)debris.
3
An unconsolidated mass moving downslope as a viscous fluid is referred to as a:
A)slump.
B)flow.
C)slide.
D)fall.
4
The driving force behind all mass wasting processes is:
A)presence of vegetation.
B)presence of water.
C)gravity.
D)slope angle.
5
The resistance of a mass of debris to movement or deformation is its:
A)density.
B)shear force.
C)mass.
D)shear strength.
6
Flow of water-saturated soil over an impermeable material is called:
A)solifluction.
B)fall.
C)slip.
D)flow.
7
An apron of rocks and boulders that accumulates at the base of a cliff is called:
A)debris.
B)a rock fall.
C)breccia.
D)talus.
8
Which of the following is effective in preventing rocks from falling on a roadway?
A)Install rock bolts that "stitch" the rocks together.
B)Placement of signs stating "Watch for falling rocks".
C)Limiting traffic and the vibrations traffic creates.
D)none of these are effective methods
9
Slopes that have been stable for many years may sometimes fail catastrophically. What is a common trigger for these failures?
A)removal of vegetative cover.
B)reducing the gradient of the slope
C)draining of water from the slope
D)growth of vegetation on the slope
10
A rockfall occurs when:
A)a block of bedrock breaks off and falls freely from a cliff.
B)rock layers are displaced slowly downslope year after year.
C)soil and debris move downslope as a viscous fluid.
D)all of these.
11
For mass wasting to occur, what forces must become unbalanced?
A)normal force, shear force, friction
B)shear force and friction
C)gravity, normal force, shear force
D)gravity and friction
12
Movement associated with permafrost is:
A)avalanches
B)solifluction
C)quicksands
D)expansive clays
13
Mass wasting processes are classified according to:
A)total volume of material.
B)area over which movement occurs.
C)location on the slope.
D)none of these.
14
One method of stabilizing slopes to prevent mass wasting is:
A)build appropriately engineered retaining structures.
B)cut away the base of the slope with heavy equipment.
C)add weight to the slope.
D)make the slope steeper.
15
The rate of creep movement in soils is usually
A)a centimeter per month
B)a centimeter per week
C)a meter per day
D)a centimeter or less per year
16
Mass wasting events may be triggered by:
A)melting of permafrost.
B)earthquakes.
C)torrential rain.
D)all of these
17
Which of the following is a form of mass wasting?
A)a landslide
B)a rock avalanche
C)a mudflow
D)all of these are forms of mass wasting.
18
Rock avalanches are most common:
A)in areas where glaciers have deposited boulders and other gravel.
B)in the deepest parts of the ocean.
C)in areas of steep topography where large earthquakes are possible.
D)all of these can generate rock avalanches
19
The downslope movement of material under the influence of gravity is known as:
A)downslope movement.
B)land sliding.
C)mass wasting.
D)none of these
20
Which of the following mass wasting phenomenon moves faster than a person can run?
A)mudflow
B)debris flow
C)rock avalanche
D)all of these.





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