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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.

Each section contains 100 MCQs on Site Investigation and Geotechnical Exploration .
1
What is the primary objective of site investigation in geotechnical engineering?
Discuss
Answer & Solution
Answer: Option C
Solution:
Site investigation aims to collect data on subsurface conditions.Determination of soil and rock properties is crucial for foundation design, construction feasibility, and safety.
2
Which of the following is a non-invasive geophysical method?
Discuss
Answer & Solution
Answer: Option C
Solution:
Electrical resistivity method is a geophysical technique to estimate subsurface profiles without excavation.It is widely used to detect groundwater, voids, and different strata.
3
The standard penetration test (SPT) measures:
Discuss
Answer & Solution
Answer: Option D
Solution:
SPT involves driving a split spoon sampler into the soil and counting the blows required.It estimates soil resistance to penetration and helps assess relative density or consistency.
4
What does a borehole log provide?
Discuss
Answer & Solution
Answer: Option C
Solution:
A borehole log records information about the subsurface layers encountered during drilling.It includes depth, soil/rock type, groundwater conditions, and sampling results.
5
Which tool is used to recover undisturbed soil samples?
Discuss
Answer & Solution
Answer: Option C
Solution:
The Shelby tube is thin-walled and pushed into the soil to collect undisturbed samples.Such samples are essential for lab testing of shear strength and compressibility.
6
Which of the following methods is NOT used for groundwater table determination?
Discuss
Answer & Solution
Answer: Option C
Solution:
SPT is a penetration resistance test.Piezometers and observation wells are installed to monitor groundwater levels.
7
Dynamic cone penetration test (DCPT) is primarily used to determine:
Discuss
Answer & Solution
Answer: Option B
Solution:
DCPT measures resistance to penetration of a cone into the soil.It helps assess the relative density of cohesionless soils like sand and gravel.
8
Which drilling method is most suitable for hard rock formations?
Discuss
Answer & Solution
Answer: Option C
Solution:
Rotary drilling uses a rotating drill bit to cut through hard materials.It's efficient for hard rock formations and deep boreholes.
9
What is the N-value in SPT testing?
Discuss
Answer & Solution
Answer: Option C
Solution:
The N-value is the number of hammer blows required to drive the sampler 30 cm after an initial 15 cm seating.It helps classify soil consistency and bearing capacity.
10
The primary purpose of trial pits is to:
Discuss
Answer & Solution
Answer: Option C
Solution:
Trial pits are shallow excavations used to visually inspect and sample near-surface soils.They are suitable for small projects or detailed shallow investigations.