Groundwater and Hydrogeology MCQs Questions & Answers

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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-9 section-1

Each section contains 100 MCQs on Groundwater and Hydrogeology .

Which instrument is used to measure water table level in a borehole?

A) Manometer B) Piezometer C) Hydrometer D) Barometer

Discuss

Answer & Solution

Answer: Option B

Solution:

Piezometers are installed in wells to measure the hydraulic head or pressure at specific depths.They are essential tools for monitoring water table fluctuations.

Which geological formation typically acts as a good aquifer?

A) Clay B) Granite C) Sandstone D) Shale

Discuss

Answer & Solution

Answer: Option C

Solution:

Sandstone has high porosity and permeability, making it a good aquifer material for groundwater storage and transmission.

What is the primary cause of saltwater intrusion in coastal aquifers?

A) Heavy rainfall B) Over-pumping of groundwater C) Seismic activity D) Increased vegetation

Discuss

Answer & Solution

Answer: Option B

Solution:

Over-pumping of groundwater in coastal areas causes a pressure imbalance, allowing saltwater to migrate inland and contaminate freshwater aquifers.

Which of the following best describes an aquiclude?

A) Permeable and porous B) Impermeable and porous C) Impermeable and non-porous D) Highly transmissive

Discuss

Answer & Solution

Answer: Option C

Solution:

Aquiclude is a formation that is impermeable and non-porous, preventing water flow entirely.It confines water in adjacent aquifers.

Which test is commonly used to determine permeability in soil?

A) Consolidation test B) Direct shear test C) Constant head permeability test D) Atterberg limit test

Discuss

Answer & Solution

Answer: Option C

Solution:

Constant head permeability test is used for coarse-grained soils to measure their permeability under steady water flow conditions.

What is the typical flow direction of groundwater?

A) From low elevation to high elevation B) From high pressure to low pressure C) From low pressure to high pressure D) Circular flow

Discuss

Answer & Solution

Answer: Option B

Solution:

Groundwater flows from areas of high hydraulic head (pressure) to areas of lower head, in accordance with the hydraulic gradient.

Which method is used for geophysical groundwater exploration?

A) Sieve analysis B) Electrical resistivity C) Plasticity index D) Plate load test

Discuss

Answer & Solution

Answer: Option B

Solution:

Electrical resistivity methods measure subsurface resistance and are widely used to identify water-bearing zones and aquifer boundaries.

What does a hydrograph show?

A) Soil moisture over time B) Groundwater salinity C) Water table depth over time D) River discharge over time

Discuss

Answer & Solution

Answer: Option D

Solution:

A hydrograph is a graph that displays streamflow or river discharge versus time.It helps in understanding runoff and watershed behavior.

The capillary fringe lies:

A) Above the water table B) Below the water table C) Within the saturated zone D) In the unsaturated bedrock

Discuss

Answer & Solution

Answer: Option A

Solution:

Capillary fringe is the zone just above the water table where water rises due to capillary action and fills pores partially.

Which factor most influences groundwater velocity?

A) Rock color B) Clay content C) Hydraulic conductivity and gradient D) Soil temperature

Discuss

Answer & Solution

Answer: Option C

Solution:

Groundwater velocity is primarily governed by hydraulic conductivity (ease of flow) and the hydraulic gradient (slope of energy head).

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Groundwater and Hydrogeology MCQs Questions & Answers | Geological Engineering