Download ENVS 3060 Midterm Practice Questions 2025-2026 Biomechanisms Of Organisms Questions With R and more Exams Biomechanics in PDF only on Docsity!
ENVS 3060 Midterm Practice Questions
2025 - 2026 Biomechanisms Of
Organisms Questions With Right
Answers.
A PLUS SCORE
Who developed the equation required to calculate the hydraulic conductivity of a soil?
a) Darcy
B.) Hillel
C.) Reynolds's
D) Fetter
a) Darcy
What is Groundwater?
a) Water that exists in underground rivers and lakes.
b) Water stored in pores, fractures, and other void spaces below the ground surface.
c) Water stored above and below ground.
d) Water stored underground that is economically available
b) Water stored in pores, fractures, and other void spaces below the ground surface.
What is the main reason why uncompacted clay-rich materials have a greater porosity thansand?
a) difference in particle size.
b) difference in pore size.
c) difference in grain size sorting.
d) All of the above.
d) All of the above.
Groundwater energy can be expressed as the amount of energy per unit
a) mass.
b) weight.
c) volume.
d) all of the above
d) all of the above
True or false, hydraulic head is always a positive number?
a) True
b) False
b.) false
Specific storage is defined as
a) the amount of groundwater below the water table.
True or false, a poorly sorted material has a smaller porosity than a well sorted material?
a) True
b) False
a.) true
Darcy's Law is valid if
a) fluid flow is laminar
b) fluid flow is turbulent
c) scale of measurement is microscopic
d) Reynolds number is very high
a) fluid flow is laminar
True or false, groundwater flow rate depends only on hydraulic conductivity?
a) True.
b) False
b.) false
In the equation to calculate specific storage, the symbol α represents:
a) porosity
b) fluid compressibility
c) solid material density
d) solid material compressibility
d) solid material compressibility
If the soil water pressure head is - 10 cm, the maximum water-filled pore diameter is
a) 0.15 cm
b) 0.015 cm
c) 0.0015 cm
d) none of the above
d) none of the above
True or false, only two piezometers are required to determine the true direction of groundwater flow?
a) True
b) False.
b.) fasle
Land subsidence due to over-pumping of groundwater is a serious problem in Mexico City,why?
a) pumping increases fluid pressure and reduces total stress leading to consolidation
b) pumping drains pores and solid grains compress
c) pumping reduces fluid pressure, therefore effective stress must increase leading toconsolidation
d) fluid compressibility is much greater than solid material compressibility.
c) pumping reduces fluid pressure, therefore effective stress must increase leading toconsolidation
In the equation given in question 23, X is
a) specific storage
b) specific yield
c) porosity
d) none of the above
c) porosity
True or false, chemical weathering is the main agent in creating primary porosity?
a) True.
b) False
b.) false
Hydraulic conductivity is:
a) sum of pressure head and gravitational head
b) ease at which a fluid is transmitted through a porous material
c) only a property of the porous material
d) depends only on fluid properties
b) ease at which a fluid is transmitted through a porous material
Why is kinetic energy not considered when determining groundwater flow?
a) groundwater is too dense
b) groundwater is too viscous
c) groundwater is too slow
d) groundwater is too fast
c) groundwater is too slow
True or false, below the water table, pressure head is greater than atmosphericpressure?
a) True
b) False
a.) true
Which statement describes surface tension?
a) occurs mainly at a gas-liquid interface
b) causes liquid surface to bend or contract
c) it is a force per unit length
d) all of the above
d) all of the above
True or false, to calculate height of capillary rise, capillary force must be balancedwith gravitational force?
a) True
b) False
a.) true
b) False
b.) false
Which system do the K vectors in the diagram shown below represent?
a) homogeneous and isotropic
b) homogeneous and anisotropic
c) heterogeneous and isotropic
d) heterogeneous and anisotropic
d) heterogeneous and anisotropic
The sum of effective stress and fluid pressure in groundwater system is:
a) specific storage
b) total stress
c) specific yield
d) hydraulic head
b) total stress
Which term is defined as the volume of water that drains from a porous materialdue to gravity per unit volume of material?
a) specific storage
b) specific yield
c) storativity
d) effective stress
b) specific yield
Which term is calculated with θg(Pb/ Pw)?
a) volume of water per unit volume of bulk soil
b) volume wetness
c) mass wetness
d) both a and b
d) both a and b
True or false, at saturation when hp = 0, all pores are filled with water and θg = n,the porosity?
a) True
b) False
b.) false
True or false, the air entry pressure head is measured below the water table?
a) True
b) False
b.) false
A soil water release curve is the relationship between
d) none of the above
c) g/(cm.s)
True or false, the contact angle between a solid and a liquid is acute if the adhesive affinity between solid and liquid is strong relative to cohesive forces insideliquid?
a) True
b) False.
a) True
True or false, for a given negative pressure head, a clay soil will typically containmore water than a sandy soil?
a) True
b) False
a.) true
True or false, the specific yield of clay is greater than gravel?
a) True
b) False
b.) false
True or false, a ground penetrating radar system emits radio waves?
a) True.
b) False.
a.) true
For the Hvorslev test
a) rate of recovery is proportional to K
b) a steel slug is added to the well
c) geological material and water are both assumed to be incompressible.
d) all of the above.
d) all of the above
- What are the disadvantages of pumping tests?
a) $$ High cost
b) Non-uniqueness of T and S results
c) Disposal of potentially contaminated water
d) All of the above.
d) All of the above
- Why is drawdown measured during a pumping test?
a) use data to estimate T and S
b) check for salt water intrusion
c) check for possibility of land subsidence
a) long times
- Why is drawdown measured during a pumping test?
a) use data to estimate T and S
b) check for salt water intrusion
c) check for land subsidence
d) all of the above
d) all of the above
- True or false, only one observation well is needed to measure both T and S using the Theis method?
a) True
b) False
a) True
- Groundwater monitoring well screens
a) permit free flow of water into the well pipe
b) prevent fine particles from plugging the well pipe
c) can be made from slotted plastic pipe
d) all of the above
d) all of the above
- True or false, contaminant concentration decreases away from a source in flowing groundwater due to hydrodynamic dispersion?
a) True
b) False
a) True
- An in situ groundwater remediation method is
a) air sparging
b) funnel and gate
c) reactive wall
d) all of the above
d) all of the above
Thesis assumptions
Aquifer is confined top and bottom
- There is NO source of recharge
- Aquifer is compressible and water is releasedinstantaneously from the aquifer as the head islowered
- Pumping at constant rate
drawdown
Change in water level due to an external stress such as pumping.
