Question 1

Given the right kind of bedrock, cave formation occurs most readily ________.

Accepted Answer

A)  beneath the ocean
B)  in tropical areas with high rainfall and abundant vegetation
C)  in arid and semi-arid regions with strongly alkaline surface waters
D)  in temperate to high latitude settings where seasonal freeze-thaw fractures the bedrockE) All of the above
F) B) and C)

Question 2

Provide two examples of possible "fast-entry" pathways for contaminated aquifers.

Accepted Answer

improperly abandoned wells, fence post h...

Question 3

Considering their relative density and solubility in water, how would hazardous substances behave that accidentally entered a groundwater system?

Accepted Answer

A)  Gasoline and kerosene would float on the water table; ethyl alcohol would dissolve and disperse in the groundwater.
B)  Gasoline and kerosene would float on the water table, but most pesticides break down chemically when they reach the water table.
C)  Sulphuric and nitric acids would sink to the bottom of the aquifer; kerosene would accumulate as a layer just below the water table.
D)  E-coli bacteria may build up in groundwater but can be diluted or rinsed away with sufficient input of natural surface waters such as farm runoff.E) B) and D)
F) B) and C)

Question 4

After ice sheets and glaciers, ________ contains the next highest percentage of Earth's freshwater that is readily accessible to humans.

Accepted Answer

A)  groundwater
B)  the atmosphere
C)  lakes and rivers
D)  Dasani/Coca-cola Ltd.E) A) and C)
F) C) and D)

Question 5

Ground water aquifers can be seen directly in natural caverns and mines.

Accepted Answer

A) True 
 B)False

Question 6

A ________ is a circular to elliptical, closed depressions in karst areas.

Accepted Answer

The answer of A ________ is a circular to elliptical,...

Question 7

________ is the volume of voids or open space in a rock or unconsolidated material.

Accepted Answer

A)  Permeability
B)  Porosity
C)  Saturation index
D)  CapillarityE) B) and C)
F) All of the above

Question 8

Under most conditions, groundwater moves ________.

Accepted Answer

A)  very quickly as it flows predominantly in open cavernous underground rivers
B)  only between rainstorms by drainage
C)  very little as most of it is stagnant and all at a single level
D)  at slow but variable rates generally less than a few metres per dayE) C) and D)
F) A) and D)

Question 9

Which one of the following is not a speleothem?

Accepted Answer

A)  geyserite
B)  dripstone
C)  stalactite
D)  stalagmiteE) All of the above
F) A) and B)

Question 10

In three words, describe the shape of the water table around a pumping well.

Accepted Answer

The answer of In three words, describe the shape of...

Question 11

For unconfined aquifers, what hydrologic factor is approximated by the slope of the water table?

Accepted Answer

A)  hydraulic gradient
B)  hydraulic competency
C)  porosity head
D)  affluent declineE) None of the above
F) B) and D)

Question 12

What force pushes groundwater from pore to pore below the water table?

Accepted Answer

A)  integrated saturation impulse
B)  surface tension
C)  hydraulic gradient
D)  permeability steepnessE) All of the above
F) None of the above

Question 13

Which one of the following concerning stalactites and stalagmites is false?

Accepted Answer

A)  Stalactites are deposited from water dripping from the ceiling of an aerated cavern.
B)  Both are composed of calcium carbonate.
C)  Both are forms of dripstone; stalactites hang from the ceiling, stalagmites grow upward from the cavern floor.
D)  Stalagmites form on the floors of caves below the water table.E) A) and B)
F) B) and C)

Question 14

When examining the geology of a region for potential aquifers, what characteristics or factors would you consider? Also, what areas (based on natural and human factors)would you avoid?

Accepted Answer

Look for permeable substrate; either wel...

Question 15

Groundwater is tightly held by surface tension to mineral grains or other soil particles in the ________ and actually "wicks up" significant distances above the regional water table.

Accepted Answer

A)  capillary fringe
B)  gitchee gumee
C)  aquiclude
D)  zone of saturationE) A) and B)
F) B) and D)

Question 16

Which of the following is not a general characteristic of groundwater?

Accepted Answer

A)  constant temperature year round
B)  rarely contains dissolved constituents
C)  rarely contains suspended sediment
D)  supply is independent of short droughtsE) A) and D)
F) B) and C)

Question 17

In Darcy's Law for flow velocity written as: V = (K/n) * (h/l) , what does h/l stand for?

Accepted Answer

A)  capacity
B)  hydraulic gradient
C)  permeability
D)  porosityE) A) and D)
F) A) and C)

Question 18

When water is quickly produced from a well, locally the water table and aquifer experience ________.

Accepted Answer

A)  artesian flow
B)  artificial insemination
C)  decreased flow velocity towards the well
D)  drawdownE) A) and B)
F) A) and C)

Question 19

Which of the following statements is false for an area subsiding because of excessive pumping of groundwater?

Accepted Answer

A)  Dewatered aquifer material compacts.
B)  Effluent streams may dry up.
C)  Water table is substantially lowered.
D)  The aquifer is consolidated bedrock.E) A) and C)
F) A) and D)

Question 20

What feature originates where the water table intersects the land surface?

Accepted Answer

The answer of What feature originates where the water table...

Exam 16: Groundwater

In three words, describe the shape of the water table around a pumping well.

Correct AnswerverifiedShow Answer

What force pushes groundwater from pore to pore below the water table?

Correct AnswerverifiedShow Answer

Considering their relative density and solubility in water, how would hazardous substances behave that accidentally entered a groundwater system?

Correct AnswerverifiedShow Answer

In Darcy's Law for flow velocity written as: V = (K/n) * (h/l) , what does h/l stand for?

Correct AnswerverifiedShow Answer

________ is the volume of voids or open space in a rock or unconsolidated material.

Correct AnswerverifiedShow Answer

Which one of the following concerning stalactites and stalagmites is false?

Correct AnswerverifiedShow Answer

For unconfined aquifers, what hydrologic factor is approximated by the slope of the water table?

Correct AnswerverifiedShow Answer

When examining the geology of a region for potential aquifers, what characteristics or factors would you consider? Also, what areas (based on natural and human factors)would you avoid?

Correct AnswerverifiedLook for permeable substrate; either wel...View AnswerShow Answer

Groundwater is tightly held by surface tension to mineral grains or other soil particles in the ________ and actually "wicks up" significant distances above the regional water table.

Correct AnswerverifiedShow Answer

Which one of the following is not a speleothem?

Correct AnswerverifiedShow Answer

Provide two examples of possible "fast-entry" pathways for contaminated aquifers.

Correct Answerverifiedimproperly abandoned wells, fence post h...View AnswerShow Answer

Which of the following is not a general characteristic of groundwater?

Correct AnswerverifiedShow Answer

Which of the following statements is false for an area subsiding because of excessive pumping of groundwater?

Correct AnswerverifiedShow Answer

Given the right kind of bedrock, cave formation occurs most readily ________.

Correct AnswerverifiedShow Answer

What feature originates where the water table intersects the land surface?

Correct AnswerverifiedShow Answer

After ice sheets and glaciers, ________ contains the next highest percentage of Earth's freshwater that is readily accessible to humans.

Correct AnswerverifiedShow Answer

Ground water aquifers can be seen directly in natural caverns and mines.

Correct AnswerverifiedShow Answer

When water is quickly produced from a well, locally the water table and aquifer experience ________.

Correct AnswerverifiedShow Answer

A ________ is a circular to elliptical, closed depressions in karst areas.

Correct AnswerverifiedShow Answer

Under most conditions, groundwater moves ________.

Correct AnswerverifiedShow Answer

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Look for permeable substrate; either wel...
View Answer

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improperly abandoned wells, fence post h...
View Answer

Correct Answer
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