GEOLOGY 201 FINAL EXAM QUESTIONS WITH
VERIFIED ANSWERS
The Clean Water Act of 1972 requires that _____ percent of the BOD removed from water
sources by secondary treatment processes
85
Gasoline is an example of
LNAPL
What is not a common attenuation mechanism for contaminants in groundwater
hydrolysis
what are common attenuation mechanisms for contaminants in groundwater
hydrodynamic dispersion, diffusion, biogradation
Free-phase DNAPL plumes will move in what direction?
vertically downward to the base of the aquifer
For pump and treat strategies of remediation, it is important to delineate the ______ , a
region of flow that is intercepted by one or more wells pumping at a certain rate
Capture Zone
A common mechanism for the formation of lateral spreads is
remolding due to displacement of salty pore water in underlying clayey beds by freshwater
Other conditions being the same, which situation is most likely to produce a landslide
Sedimentary strata dipping parallel to the slope of the hillside
the safety factor of a slope is:
the ratio of the resisting forces to the driving forces
In the Mohr-Coulumb equation fro a saturated material, the effective normal stress is
equal to the:
normal stress minus the fluid pressure
name 3 things that will increase the resisting forces on a slope
drainage, loading the toe, installing rock bolts
migration of a waterfall is a consequence of:
headward erosion
, a deposition feature that forms where a stream emerges from a mountain front onto a
valley is called an
alluvial fan
Particle A has the radius two times greater than of Particle B. All other conditions being
equal, what is the relation between their terminal velocities of settling in water?
The velocity of Particle A is 4 times that of Particle B
What does the term "100-year flood" mean?
*it is a flood recurrence interval based on statistical analysis of many decades of stream data
* there is a 1% chance that there will be a flood of this magnitude every year
The formula gT/2pi expresses what?
wave velocity in deep water
rapidly moving currents flowing directly away from a beach in seaward direction are
known as:
rip currents
erosion of overlying rock exposing previously buried rock can contribute to the process
called:
exfoliation
IN the near surface zone, CO2 forms carbonic acid by reaction with:
water
weathering of mineral orthoclase in acidic water produces which mineral?
Kaolinite
which mineral is most stable on earths surface
quartz
name the forms of mechanical weathering
frost action, exfoliation, salt weathering, temperature changes, biogenic processes
products of weathering (metal oxides & clay minerals) are transported form where?
the E (eluviation) horizon to the B (illuviation) horizon
the soils, the term cohesion refers to:
the attractive forces between individual clay particles
VERIFIED ANSWERS
The Clean Water Act of 1972 requires that _____ percent of the BOD removed from water
sources by secondary treatment processes
85
Gasoline is an example of
LNAPL
What is not a common attenuation mechanism for contaminants in groundwater
hydrolysis
what are common attenuation mechanisms for contaminants in groundwater
hydrodynamic dispersion, diffusion, biogradation
Free-phase DNAPL plumes will move in what direction?
vertically downward to the base of the aquifer
For pump and treat strategies of remediation, it is important to delineate the ______ , a
region of flow that is intercepted by one or more wells pumping at a certain rate
Capture Zone
A common mechanism for the formation of lateral spreads is
remolding due to displacement of salty pore water in underlying clayey beds by freshwater
Other conditions being the same, which situation is most likely to produce a landslide
Sedimentary strata dipping parallel to the slope of the hillside
the safety factor of a slope is:
the ratio of the resisting forces to the driving forces
In the Mohr-Coulumb equation fro a saturated material, the effective normal stress is
equal to the:
normal stress minus the fluid pressure
name 3 things that will increase the resisting forces on a slope
drainage, loading the toe, installing rock bolts
migration of a waterfall is a consequence of:
headward erosion
, a deposition feature that forms where a stream emerges from a mountain front onto a
valley is called an
alluvial fan
Particle A has the radius two times greater than of Particle B. All other conditions being
equal, what is the relation between their terminal velocities of settling in water?
The velocity of Particle A is 4 times that of Particle B
What does the term "100-year flood" mean?
*it is a flood recurrence interval based on statistical analysis of many decades of stream data
* there is a 1% chance that there will be a flood of this magnitude every year
The formula gT/2pi expresses what?
wave velocity in deep water
rapidly moving currents flowing directly away from a beach in seaward direction are
known as:
rip currents
erosion of overlying rock exposing previously buried rock can contribute to the process
called:
exfoliation
IN the near surface zone, CO2 forms carbonic acid by reaction with:
water
weathering of mineral orthoclase in acidic water produces which mineral?
Kaolinite
which mineral is most stable on earths surface
quartz
name the forms of mechanical weathering
frost action, exfoliation, salt weathering, temperature changes, biogenic processes
products of weathering (metal oxides & clay minerals) are transported form where?
the E (eluviation) horizon to the B (illuviation) horizon
the soils, the term cohesion refers to:
the attractive forces between individual clay particles
