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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-3 section-1

21
What is the main use of cross-hole seismic testing?
Discuss
Answer & Solution
Answer: Option C
Solution:
Cross-hole seismic testing involves generating waves in one borehole and recording in another to accurately determine in-situ wave velocities.
22
Gravimeters are calibrated to detect differences as small as:
Discuss
Answer & Solution
Answer: Option B
Solution:
Gravimeters are sensitive instruments capable of detecting microgravity changes as low as 0.01 milligal.
23
Which geophysical method is best for locating underground utility pipes?
Discuss
Answer & Solution
Answer: Option B
Solution:
GPR is ideal for shallow, high-resolution imaging, making it the best for locating utility lines, cables, and pipes.
24
What does an anomaly in geophysical surveys typically indicate?
Discuss
Answer & Solution
Answer: Option B
Solution:
A geophysical anomaly represents a deviation from normal background values, often indicating subsurface features like cavities or ore bodies.
25
Dipole-dipole configuration is most useful for:
Discuss
Answer & Solution
Answer: Option C
Solution:
Dipole-dipole configuration is favored in resistivity imaging because it can capture lateral and vertical variations in subsurface resistivity.
26
Which wave type travels fastest in seismic methods?
Discuss
Answer & Solution
Answer: Option D
Solution:
Primary (P) waves are the fastest seismic waves and are the first to arrive at a detector.They are compressional in nature.
27
What affects the accuracy of gravity surveys the most?
Discuss
Answer & Solution
Answer: Option B
Solution:
Altitude or elevation corrections are critical in gravity surveys because gravitational force changes with height.Proper corrections are needed for accurate results.
28
Vertical Electrical Sounding (VES) primarily helps determine:
Discuss
Answer & Solution
Answer: Option C
Solution:
VES uses increasing electrode spacing to estimate thickness and resistivity of subsurface layers.
29
Which geophysical method is suitable for landslide risk assessment?
Discuss
Answer & Solution
Answer: Option C
Solution:
Seismic refraction can identify weak layers and sliding surfaces that could cause slope failure.
30
Borehole logging in geophysical exploration typically provides:
Discuss
Answer & Solution
Answer: Option C
Solution:
Borehole geophysical logging records physical properties (like resistivity, density, porosity) along the depth of a borehole to evaluate in-situ rock conditions.