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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-2 section-1

Each section contains 100 MCQs on Groundwater and Hydrogeology .
11
Which type of porosity is associated with fractures and cracks in rock?
Discuss
Answer & Solution
Answer: Option B
Solution:
Secondary porosity arises due to post-depositional processes like fracturing or faulting and enhances groundwater flow in hard rocks.
12
Which property affects water retention but not groundwater flow?
Discuss
Answer & Solution
Answer: Option C
Solution:
Specific retention is the portion of water that remains in the soil after gravity drainage.It doesn�t contribute to groundwater flow but is important for soil moisture content.
13
In Darcy�s Law, what does the hydraulic gradient represent?
Discuss
Answer & Solution
Answer: Option B
Solution:
The hydraulic gradient is the slope of the water table or potentiometric surface and is the driving force for groundwater movement.
14
A confined aquifer is:
Discuss
Answer & Solution
Answer: Option B
Solution:
A confined aquifer is bounded above and below by impermeable layers like clay, and holds water under pressure.
15
Which zone contains both water and air in the pores?
Discuss
Answer & Solution
Answer: Option C
Solution:
The unsaturated zone (or vadose zone) lies above the water table and contains a mix of air and water in the pores.It is significant for soil moisture and infiltration studies.
16
What term is used to describe the volume of water a rock can store and transmit?
Discuss
Answer & Solution
Answer: Option D
Solution:
Specific yield is the portion of groundwater that can be drained by gravity and is available for use or transmission.It differs from porosity which includes all voids, including those that can't release water.
17
Which one is NOT a method of artificial groundwater recharge?
Discuss
Answer & Solution
Answer: Option D
Solution:
Overpumping refers to excessive extraction, not recharge. It actually lowers groundwater levels and may cause aquifer depletion.
18
What does Darcy�s Law quantify?
Discuss
Answer & Solution
Answer: Option B
Solution:
Darcy�s Law relates to groundwater flow and states that flow rate is proportional to the hydraulic gradient and permeability.It�s a foundational principle in hydrogeology.
19
Which of the following will typically have the lowest porosity?
Discuss
Answer & Solution
Answer: Option A
Solution:
While gravel has large voids, its total porosity is lower due to better packing.Clay and shale have higher porosity but low permeability.
20
What is the term for an aquifer that lies above the regional water table and is perched on an aquiclude?
Discuss
Answer & Solution
Answer: Option C
Solution:
A perched aquifer occurs when a localized aquiclude traps water above the main water table, creating a temporary saturated zone.