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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-8 section-1

Each section contains 100 MCQs on Site Investigation and Geotechnical Exploration .
71
What is the role of split spoon sampler in SPT?
Discuss
Answer & Solution
Answer: Option C
Solution:
The split spoon sampler is used in the SPT to collect disturbed samples of soil for identification and classification.
72
What type of soil is best identified through a vane shear test?
Discuss
Answer & Solution
Answer: Option B
Solution:
The vane shear test is most suitable for determining the undrained shear strength of soft to stiff cohesive clays.
73
Which boring method uses continuous flight helical screw?
Discuss
Answer & Solution
Answer: Option C
Solution:
Auger boring uses a helical screw that rotates and brings soil to the surface for sampling and inspection.
74
Which geophysical method is best suited for detecting groundwater tables?
Discuss
Answer & Solution
Answer: Option B
Solution:
The resistivity method is sensitive to changes in moisture content and is highly effective for locating groundwater tables.
75
What is a core barrel used for in geotechnical drilling?
Discuss
Answer & Solution
Answer: Option C
Solution:
A core barrel is a tool used during rotary drilling to recover cylindrical rock cores, useful for geological logging and testing.
76
What does a borehole log primarily document?
Discuss
Answer & Solution
Answer: Option B
Solution:
A borehole log provides a detailed record of the subsurface soil and rock layers, groundwater conditions, and sampling depths encountered during drilling. It's essential for engineering analysis.
77
Which method is used to obtain high-quality rock core samples?
Discuss
Answer & Solution
Answer: Option C
Solution:
Rotary core drilling involves rotating a hollow drill bit to cut and retrieve continuous cylindrical rock samples called cores.
78
What is the main advantage of using geophysical surveys in site investigations?
Discuss
Answer & Solution
Answer: Option C
Solution:
Geophysical methods like seismic or resistivity are non-destructive and cover large areas quickly, helping locate anomalies without excavation.
79
Which of the following provides the most accurate groundwater level measurement?
Discuss
Answer & Solution
Answer: Option C
Solution:
An observation well (or piezometer) allows direct and accurate measurement of groundwater level over time.
80
The Standard Penetration Test is carried out at intervals of:
Discuss
Answer & Solution
Answer: Option A
Solution:
The SPT is commonly performed at regular intervals of 1.5 meters or at changes in strata to evaluate soil consistency.