Department of Geosciences
North Dakota State University
GEOLOGY 105
SELF-TEST SITE


NDSU

Underground Water Self-Test: 12 questions

Special Instructions:
Using your mouse, click on the one, BEST answer. Upon completion of the exam, click the SUBMIT button, and the exam will be graded for you. You will also have the opportunity to review how well you answered each question.
1. The ability of an earth material to transmit water is a measure of its:
porosity
saturation
salinity
permeability
head

2. What compound (which exists only in dissolved form) is produced upon the chemical weathering of limestone?:
CaCO3
CaSO4
Ca(HCO3)2
Na2SO4
Na2SO4.2H2O

3. A local water table positioned above the regional water table is said to be:
stranded
shifted
displaced
perched
depressed


4. Ms. Stick (and her might dog Twig) are shown above actively pumping a well. The lowering effect on the water table about the base of the well stem is called a:
aquiclude
artesian surface
perched surface
speleothem
cone of depression

5. In Darcy's Law, K represents:
hydraulic head
gradient
coefficient of permeability
coefficient of porosity
water table elevation


6. Above, Mr. Stick is shown standing in a cave next to a:
aquiclude
stalactite
stalagmite
column
pillar

7. Referring to Question #6, what is the composition of this cavern feature?:
CaCO3
CaSO4
Ca(HCO3)2
Na2SO4
Na2SO4.2H2O

8. The most abundant, natural acid is:
nitric
sulfuric
hydrochloric
citric
carbonic

9. The best aquiclude would have which one of the following pairs of characteristics?:
low permeability and high porosity
high permeability and high porosity
high permeability and low porosity
low permeability and low porosity
-----

10. Which one of the following statements is TRUE about hydraulic head?:
The lower the hydraulic head, the greater the pressure of water flow in an aquifer.
It can force groundwater to flow upward.
Any aquifer with hydraulic head will have flowing wells.
Artesian wells have no hydraulic head.
It results from having a discharge zone higher in elevation than the recharge zone.

11. Which one of the following features is a sure sign of karst?:
sinkholes
speleothems
flowing wells
perched water tables
cones of depression

12. The water table represents the elevation of the:
top of the zone of saturation
bottom of the zone of saturation
top of the zone of aeration
top of the zone of accumulation
bottom of the zone of accumulation


[ Return to Exam Index ]      [ Return to Geology 105 Homepage ]