Question 1

A desert oasis occurs where the water table is at the surface.

Accepted Answer

A) True 
 B)False  True

Question 2

Water levels lower during the wet season and rise during the dry season due to the lag time effect.

Accepted Answer

A) True 
 B)False  False

Question 3

Lakes are an important reservoir of continental freshwater.

Accepted Answer

A) True 
 B)False  False

Question 4

When river water is used for households, what category of water use is that?

Accepted Answer

A)   instream; nonconsumptive
B)   instream; consumptive
C)   offstream; nonconsumptive
D)   offstream; consumptive
E)   instream and offstream; consumptive and nonconsumptive

Question 5

In ocean islands, such as Hawaii, the freshwater body within the island floats on top of ocean water.

Accepted Answer

A) True 
 B)False

Question 6

What does the term mining mean in the context of groundwater resources?

Accepted Answer

A)   refers to hand dug vertical water wells
B)   refers to horizontal mine shafts excavated to tap water from the interior of a mountain
C)   refers to separating out minerals from groundwater by chemical solution
D)   refers to the situation where water is taken out of the ground faster than it is replaced
E)   refers to quanats in the Middle East

Question 7

What is sustained yield, and what happens if it is exceeded?

Accepted Answer

The answer of What is sustained yield, and what happens...

Question 8

How much of the world's water is freshwater?

Accepted Answer

A)   30%
B)   20%
C)   10%
D)   5%
E)   less than 3%

Question 9

Porosity refers to the ease with which fluids pass through rock and soil masses.

Accepted Answer

A) True 
 B)False

Question 10

Groundwater everywhere tends to occur in underground pools and streams.

Accepted Answer

A) True 
 B)False

Question 11

If you disregard agricultural use, about one-third of U.S. public water supply comes from groundwater.

Accepted Answer

A) True 
 B)False

Question 12

Typically, a significant amount of groundwater is held within a water-bearing formation and will not flow out into wells. The water that is held this way is called specific yield.

Accepted Answer

A) True 
 B)False

Question 13

What is a "water witch,"also known as a "dowser"?

Accepted Answer

A)   a female spiritualist who likes to drop water balloons on hapless victims
B)   a type of insect that is able to land on the surface of a pond
C)   one who claims to be able to locate groundwater using "divining rods"
D)   a well-drilling device that drills or witches its way into the ground
E)   a device for hydraulic mining for gold and gem stones

Question 14

Hard water is common in areas underlain by limestone.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following refers to the level underground below which all open spaces are filled with water?

Accepted Answer

A)   zone of aeration
B)   capillary fringe
C)   water table
D)   pressure head
E)   aquiclude

Question 16

A city with a population of 80,000 people covers an area of 10 miles by 12 miles. The city council wants to determine if it has enough groundwater resources to supply its population at the U.S. average rate of 1,400 gallons per person per day. Drilling has determined that there is a 20-foot thick aquifer under the entire city with a porosity of 20% and a specific yield of 5%. The city geologist has determined that the sustained yield is one-fiftieth of the specific yield. Up to how many gallons per person per day can this city pump water without lowering the water table? (There are 640 acres in a square mile and 325,851 gallons in an acre-foot.)

Accepted Answer

A)   1,251 gallons per person per day
B)   62,563 gallons per person per day
C)   100,101,427 gallons per person per day
D)   625,633,920 gallons per person per day
E)   5,005,071,360 gallons per person per day

Question 17

How did use of groundwater affect surface water resources in the case of the San Joaquin River, California?

Accepted Answer

The answer of How did use of groundwater affect surface...

Question 18

What do the terms oligotrophic, mesotrophic, and eutrophic refer to?

Accepted Answer

A)   nutrient levels in lakes
B)   severity of catastrophic events in nature
C)   depth of groundwater resources
D)   types of consumptive water use
E)   classes of groundwater based on origin

Question 19

What is a cone of depression?

Accepted Answer

A)   an explosive volcanic feature
B)   a contour map of a sink hole, having a roughly conical shape
C)   an area where the water table has been drawn down locally around a water well
D)   a feature found in limestone caverns
E)   a low area on a structure contour map

Question 20

A permeable rock mass must be porous (or fractured), but a porous rock mass may not necessarily be permeable.

Accepted Answer

A) True 
 B)False

Exam 8: Freshwater Resources

A desert oasis occurs where the water table is at the surface.

Water levels lower during the wet season and rise during the dry season due to the lag time effect.

Lakes are an important reservoir of continental freshwater.

When river water is used for households, what category of water use is that?

In ocean islands, such as Hawaii, the freshwater body within the island floats on top of ocean water.

What does the term mining mean in the context of groundwater resources?

What is sustained yield, and what happens if it is exceeded?

How much of the world's water is freshwater?

Porosity refers to the ease with which fluids pass through rock and soil masses.

Groundwater everywhere tends to occur in underground pools and streams.

If you disregard agricultural use, about one-third of U.S. public water supply comes from groundwater.

Typically, a significant amount of groundwater is held within a water-bearing formation and will not flow out into wells. The water that is held this way is called specific yield.

What is a "water witch,"also known as a "dowser"?

Hard water is common in areas underlain by limestone.

Which of the following refers to the level underground below which all open spaces are filled with water?

How did use of groundwater affect surface water resources in the case of the San Joaquin River, California?

What do the terms oligotrophic, mesotrophic, and eutrophic refer to?

What is a cone of depression?

A permeable rock mass must be porous (or fractured), but a porous rock mass may not necessarily be permeable.