Question 1

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

Accepted Answer

A)   porosity
B)   capacity
C)   permeability
D)   hydraulic gradientE) C) and D)
F) B) and C)

Question 2

Which one of the following concerning artesian wells is false?

Accepted Answer

A)   The aquifer is generally inclined, and it is saturated to an elevation above the point where the well penetrates the aquifer.
B)   When the well penetrates the aquifer, the water rises to the bottom of the aquitard above the aquifer.
C)   The well penetrates an aquifer underlain by an impermeable bed.
D)   The well penetrates an aquifer overlain by an aquitard.E) A) and B)
F) C) and D)

Question 3

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

Accepted Answer

A)   porosity
B)   capacity
C)   hydraulic gradient
D)   permeabilityE) A) and D)
F) B) and C)

Question 4

are specific features of karst topography.

Accepted Answer

A)   Streams flowing into depressions and continuing underground
B)   Perched water table springs on hillsides
C)   Perennial streams fed by large springs
D)   Numerous artesian wells in a given areaE) None of the above
F) B) and C)

Question 5

What proportion of the world's water for agriculture (irrigation, greenhouses, golf courses)  is supplied by groundwater aquifers?

Accepted Answer

A)   50%
B)   87%
C)   25%
D)   40%E) A) and B)
F) All of the above

Question 6

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

Accepted Answer

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

Question 7

Excessive groundwater withdrawals can cause .

Accepted Answer

A)   porosity in the aquifer to increase as the water is removed
B)   the cone of depression to invert
C)   the water table to decline in elevation and land to subside
D)   uplift through expansion of the dewatered aquiferE) C) and D)
F) A) and D)

Question 8

Geysers periodically boil and erupt because .

Accepted Answer

A)   new groundwater flows in to replace that lost in the prior eruption, this takes time
B)   each injection of hot magma at depth triggers another episode of boiling in groundwater
C)   the god Vulcan is at work at his subterranean forge
D)   great pressures from deep water- filled chambers prevent water from boiling until higher temperatures are reached; eventually enough heat is supplied by the hot (volcanic)  rocks to expand the water and let it boil anywayE) A) and B)
F) A) and C)

Question 9

What proportion of the world's water for industrial use (cooling, solvation, transport, manufacturing etc.)  is supplied by groundwater aquifers?

Accepted Answer

A)   87%
B)   40%
C)   25%
D)   50%E) None of the above
F) A) and B)

Question 10

Where are the most famous geyser in the world?

Accepted Answer

A)   Yellowstone National Park, U.S.
B)   Banff Hot Springs in the Canadian Rockies
C)   Iceland's Groundwater Preserve
D)   Ottawa's famous bombastic effluentE) All of the above
F) None of the above

Question 11

Where does the majority of fresh groundwater reside?

Accepted Answer

A)   flowing in large underground rivers
B)   as superheated steam in vast hotspring and geyser fields
C)   in pores within soils and sediments or in fractures in rocks
D)   as large stationary bodies in enormous underground cavernsE) C) and D)
F) All of the above

Question 12

Groundwater is tightly held by surface tension to mineral grains or other soil particles in the

Accepted Answer

A)   zone of saturation
B)   aquiclude
C)   gitchee gumee
D)   capillary fringeE) None of the above
F) A) and B)

Question 13

How do we know which direction ground water will flow?

Accepted Answer

A)   It is generally the same as the prevailing wind direction.
B)   It flows perpendicular to the water table contours, in a downhill direction.
C)   It is parallel to local stream flow, just slower.
D)   Dye or chemical tracer tests are required, often requiring multiple wells and months.E) None of the above
F) A) and B)

Question 14

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

Accepted Answer

A)   Sulphuric and nitric acids would sink to the bottom of the aquifer; kerosene would accumulate as a layer just below the water table.
B)   Gasoline and kerosene would float on the water table; ethyl alcohol would dissolve and disperse in the groundwater.
C)   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.
D)   Gasoline and kerosene would float on the water table, but most pesticides break down chemically when they reach the water table.E) B) and D)
F) C) and D)

Question 15

The fastest groundwater flows would be expected for an aquifer with .

Accepted Answer

A)   high porosity and many small pores
B)   high specific retention and low permeability
C)   low gradients and low permeability with a few very large pores
D)   high gradients (hydraulic head)  and high permeabilityE) A) and D)
F) A) and C)

Question 16

From the typical hydrologic properties of materials, which would make the best aquifer considering just the water delivery, not its turbidity or chemistry?

Accepted Answer

A)   granite, limestone, sandstone
B)   clay, sand, soil
C)   basalt, granite, sandstone
D)   basalt, gravel, limestoneE) All of the above
F) C) and D)

Question 17

Of the choices listed on flow characteristics alone, if the following aquifers became contaminated, which would remain contaminated for the longest time?

Accepted Answer

A)   sand
B)   clay
C)   gravel
D)   limestoneE) None of the above
F) C) and D)

Question 18

The travertine hot spring deposits at Mammoth Hot Springs, Yellowstone National Park, are more spectacular than most. Around the immediate area are either unconsolidated glacial deposits or Tertiary volcanics. What rock probably lies deeper beneath the hot springs to account for all the travertine deposits?

Accepted Answer

A)   shale
B)   quartzite
C)   limestone
D)   rhyoliteE) A) and B)
F) A) and C)

Question 19

An aquifer is .

Accepted Answer

A)   a saturated, porous, and permeable layer or stratum that has high water flow
B)   the best place to dispose of soluble toxic waste
C)   a layer or stratum in which groundwater flows downward to the water table
D)   an unsaturated bed or stratum below a springE) C) and D)
F) B) and D)

Question 20

An artesian well is one in which .

Accepted Answer

A)   water has enough head to rise above the top of the aquifer without any pumping
B)   pressurized groundwater rises from a deep, unsaturated aquifer
C)   the well is horizontal and the water table is perched
D)   the water is warm, fairly saline, and recharged by a streamE) B) and C)
F) A) and D)

Exam 8: Geologic Time

Groundwater is tightly held by surface tension to mineral grains or other soil particles in the

Correct Answer
verified

Which one of the following concerning artesian wells is false?

Correct Answer
verified

How do we know which direction ground water will flow?

Correct Answer
verified

Where does the majority of fresh groundwater reside?

Correct Answer
verified

What proportion of the world's water for industrial use (cooling, solvation, transport, manufacturing etc.) is supplied by groundwater aquifers?

Correct Answer
verified

Correct Answer
verified

What proportion of the world's water for agriculture (irrigation, greenhouses, golf courses) is supplied by groundwater aquifers?

Correct Answer
verified

Of the choices listed on flow characteristics alone, if the following aquifers became contaminated, which would remain contaminated for the longest time?

Correct Answer
verified

Geysers periodically boil and erupt because .

Correct Answer
verified

Excessive groundwater withdrawals can cause .

Correct Answer
verified

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

Correct Answer
verified

An aquifer is .

Correct Answer
verified

The fastest groundwater flows would be expected for an aquifer with .

Correct Answer
verified

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

Correct Answer
verified

From the typical hydrologic properties of materials, which would make the best aquifer considering just the water delivery, not its turbidity or chemistry?

Correct Answer
verified

Where are the most famous geyser in the world?

Correct Answer
verified

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

Correct Answer
verified

An artesian well is one in which .

Correct Answer
verified

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

Correct Answer
verified

are specific features of karst topography.

Correct Answer
verified

Exam 8: Geologic Time

Groundwater is tightly held by surface tension to mineral grains or other soil particles in the

Correct AnswerverifiedShow Answer

Which one of the following concerning artesian wells is false?

Correct AnswerverifiedShow Answer

How do we know which direction ground water will flow?

Correct AnswerverifiedShow Answer

Where does the majority of fresh groundwater reside?

Correct AnswerverifiedShow Answer

What proportion of the world's water for industrial use (cooling, solvation, transport, manufacturing etc.) is supplied by groundwater aquifers?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What proportion of the world's water for agriculture (irrigation, greenhouses, golf courses) is supplied by groundwater aquifers?

Correct AnswerverifiedShow Answer

Of the choices listed on flow characteristics alone, if the following aquifers became contaminated, which would remain contaminated for the longest time?

Correct AnswerverifiedShow Answer

Geysers periodically boil and erupt because .

Correct AnswerverifiedShow Answer

Excessive groundwater withdrawals can cause .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An aquifer is .

Correct AnswerverifiedShow Answer

The fastest groundwater flows would be expected for an aquifer with .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

From the typical hydrologic properties of materials, which would make the best aquifer considering just the water delivery, not its turbidity or chemistry?

Correct AnswerverifiedShow Answer

Where are the most famous geyser in the world?

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

An artesian well is one in which .

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

are specific features of karst topography.

Correct AnswerverifiedShow Answer

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