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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-10 section-1

Each section contains 100 MCQs on Groundwater and Hydrogeology .
91
What does transmissivity of an aquifer represent?
Discuss
Answer & Solution
Answer: Option C
Solution:
Transmissivity is the rate at which groundwater flows horizontally through a unit width of the aquifer under a unit hydraulic gradient.It is the product of hydraulic conductivity and aquifer thickness.
92
Which term defines the ratio of voids volume to total volume in a rock or soil?
Discuss
Answer & Solution
Answer: Option A
Solution:
Porosity is the percentage of void spaces in a material and determines how much water it can store.
93
What does a cone of depression indicate in a groundwater system?
Discuss
Answer & Solution
Answer: Option C
Solution:
A cone of depression forms when groundwater is pumped from a well, causing the water table to dip in a cone-shaped pattern around the well.
94
Which rock type has negligible primary porosity but high secondary porosity due to fractures?
Discuss
Answer & Solution
Answer: Option A
Solution:
Granite is typically dense and has low primary porosity, but secondary porosity may be high due to cracks and fractures that allow groundwater movement.
95
What does the term "artesian well" refer to?
Discuss
Answer & Solution
Answer: Option C
Solution:
An artesian well is one in which groundwater flows naturally to the surface due to pressure in a confined aquifer.
96
What is the function of an observation well in groundwater studies?
Discuss
Answer & Solution
Answer: Option D
Solution:
Observation wells are used to monitor changes in the water table or piezometric head over time.
97
Which factor does NOT affect groundwater recharge?
Discuss
Answer & Solution
Answer: Option D
Solution:
Lunar phase has no effect on groundwater recharge.Recharge is influenced by precipitation, soil type, and vegetation.
98
Which unit is commonly used to express porosity?
Discuss
Answer & Solution
Answer: Option C
Solution:
Porosity is expressed as a percentage (%), indicating the volume of voids compared to the total volume.
99
What does an impermeable layer that restricts groundwater flow refer to?
Discuss
Answer & Solution
Answer: Option B
Solution:
An aquiclude is a completely impermeable layer that blocks water movement, such as clay or solid rock.
100
The water found in the unsaturated zone is called:
Discuss
Answer & Solution
Answer: Option D
Solution:
Vadose water refers to the water in the unsaturated zone, above the water table, including capillary and gravitational water.