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Groundwater and Hydrogeology MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Groundwater and Hydrogeology. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Groundwater and Hydrogeology chapter is particularly important for students studying Geological engineering. Page-5 section-1

Each section contains 100 MCQs on Groundwater and Hydrogeology .
41
What is the term for a rock layer that transmits water easily?
Discuss
Answer & Solution
Answer: Option C
Solution:
An aquifer is a geologic formation that can store and transmit significant quantities of water, usually due to its high permeability.
42
The vadose zone lies:
Discuss
Answer & Solution
Answer: Option B
Solution:
The vadose zone, also called the unsaturated zone, lies above the water table and contains air and some moisture in the pores.
43
Water table in a confined aquifer is also called:
Discuss
Answer & Solution
Answer: Option B
Solution:
In confined aquifers, the potentiometric surface is the hypothetical level to which water would rise in a well due to pressure.
44
In what type of soil would you expect the fastest rate of infiltration?
Discuss
Answer & Solution
Answer: Option D
Solution:
Sand has large pores and low cohesion between particles, allowing rapid infiltration of water.
45
Artesian wells occur when:
Discuss
Answer & Solution
Answer: Option B
Solution:
An artesian well taps a confined aquifer under pressure, which causes the water to rise above the top of the aquifer and possibly reach the surface without pumping.
46
Which method is most commonly used for groundwater exploration?
Discuss
Answer & Solution
Answer: Option B
Solution:
Resistivity survey is widely used in groundwater exploration because it can detect changes in subsurface moisture content.Wet zones conduct electricity better, making them detectable.
47
Permeability of a soil refers to:
Discuss
Answer & Solution
Answer: Option C
Solution:
Permeability is the property of soil that allows water to flow through its pore spaces.It�s crucial in determining infiltration and drainage rates.
48
What does a cone of depression indicate in a groundwater well?
Discuss
Answer & Solution
Answer: Option C
Solution:
A cone of depression is the lowered zone of the water table around a pumping well, caused by withdrawal of groundwater.
49
The term �porosity� refers to:
Discuss
Answer & Solution
Answer: Option C
Solution:
Porosity is defined as the ratio of the volume of voids to the total volume of the material.It indicates storage capacity for fluids.
50
Which type of aquifer is found above the regional water table?
Discuss
Answer & Solution
Answer: Option C
Solution:
A perched aquifer forms when a localized impermeable layer traps water above the main water table.It is not connected to the regional aquifer system.