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Geophysical Methods in Engineering MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Geophysical Methods in Engineering. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Geophysical Methods in Engineering chapter is particularly important for students studying Geological engineering. Page-2 section-1

11
Induced polarization (IP) is primarily used to detect:
Discuss
Answer & Solution
Answer: Option B
Solution:
IP surveys measure the delayed voltage decay in the ground and are useful in identifying disseminated metallic ores.
12
What is the unit of measurement in gravity geophysical surveys?
Discuss
Answer & Solution
Answer: Option C
Solution:
Milligal (mGal) is used to express small gravitational variations in gravity surveys.
13
In seismic surveys, the term �shot point� refers to:
Discuss
Answer & Solution
Answer: Option C
Solution:
A shot point is the location where seismic energy is introduced into the ground using explosives or mechanical sources.
14
Which of the following methods is most suitable for archaeological investigations?
Discuss
Answer & Solution
Answer: Option D
Solution:
GPR is widely used in archaeology due to its ability to resolve shallow subsurface features like walls, graves, and artifacts.
15
What does a Bouguer anomaly represent in gravity surveys?
Discuss
Answer & Solution
Answer: Option B
Solution:
A Bouguer anomaly is the corrected gravity reading that helps identify subsurface density variations like cavities, faults, or denser rock bodies.
16
Which geophysical method uses natural voltage differences to study subsurface?
Discuss
Answer & Solution
Answer: Option A
Solution:
Self-potential (SP) method measures natural electric potentials in the ground.It�s useful in detecting groundwater flow and sulfide ore bodies.
17
In resistivity surveys, the Wenner configuration is defined by:
Discuss
Answer & Solution
Answer: Option B
Solution:
Wenner configuration involves four electrodes placed at equal spacing and is widely used for shallow resistivity profiling.
18
What type of waves are used in seismic refraction methods?
Discuss
Answer & Solution
Answer: Option B
Solution:
Seismic refraction uses P-waves and S-waves that travel through Earth materials and change speed at layer interfaces.
19
The Schlumberger array in resistivity methods is best suited for:
Discuss
Answer & Solution
Answer: Option B
Solution:
Schlumberger array is efficient for deeper investigations as it requires fewer movements of electrodes.
20
Magnetic susceptibility depends on:
Discuss
Answer & Solution
Answer: Option A
Solution:
Magnetic susceptibility reflects the ability of materials (especially iron-rich) to be magnetized.It�s directly tied to mineral composition.