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Site Investigation and Geotechnical Exploration MCQs Questions & Answers | Geological Engineering

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

Each section contains 100 MCQs on Site Investigation and Geotechnical Exploration .
1
Which method is most suitable for detecting shallow subsurface cavities?
Discuss
Answer & Solution
Answer: Option B
Solution:
Electrical resistivity detects anomalies in subsurface resistance, useful for locating voids, cavities, or buried channels.
2
What is the N-value in standard penetration testing?
Discuss
Answer & Solution
Answer: Option C
Solution:
N-value is the total number of hammer blows required to drive the sampler 30 cm into the soil after the initial seating blow.
3
What is the best method to explore deep soil layers economically?
Discuss
Answer & Solution
Answer: Option C
Solution:
Seismic surveys are cost-effective for exploring deep geological features over large areas, compared to direct boring.
4
What is meant by "stratification" in site investigation?
Discuss
Answer & Solution
Answer: Option C
Solution:
Stratification refers to the layered arrangement of soils or rocks in the ground, which is important for design and construction planning.
5
What is a benchmark in site investigation?
Discuss
Answer & Solution
Answer: Option C
Solution:
A benchmark is a fixed reference point with known elevation, used to measure depths and elevations consistently on site.
6
What is the main purpose of borehole logging?
Discuss
Answer & Solution
Answer: Option B
Solution:
Borehole logging involves systematic recording of soil and rock strata encountered during drilling to identify geological profiles essential for engineering design.This includes noting changes in color, texture, moisture, and material type.
7
What is the main advantage of rotary drilling over auger boring?
Discuss
Answer & Solution
Answer: Option C
Solution:
Rotary drilling is suitable for hard strata and deep formations, which auger boring cannot efficiently penetrate.It uses a rotating drill bit with circulating fluid to cut through rock.
8
What does RMR stand for in geotechnical engineering?
Discuss
Answer & Solution
Answer: Option B
Solution:
Rock Mass Rating (RMR) is a classification system for evaluating the quality of rock masses based on parameters such as UCS, joint spacing, and groundwater conditions.It helps in tunnel and slope design.
9
Which field test is most appropriate for determining the permeability of coarse-grained soils?
Discuss
Answer & Solution
Answer: Option A
Solution:
The constant head permeability test is ideal for coarse-grained soils (like sands), allowing a steady flow of water to measure hydraulic conductivity accurately.
10
What is the primary reason for conducting a geophysical survey before drilling?
Discuss
Answer & Solution
Answer: Option A
Solution:
Geophysical surveys provide a preliminary understanding of subsurface variability, helping to strategically optimize borehole locations and reduce unnecessary drilling.