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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-5 section-1

Each section contains 100 MCQs on Site Investigation and Geotechnical Exploration .
41
In geotechnical exploration, soil stratification refers to:
Discuss
Answer & Solution
Answer: Option B
Solution:
Soil stratification is the study of how soil types vary with depth, affecting load-bearing and settlement behavior.
42
Which test gives the most reliable information about undisturbed shear strength of clay?
Discuss
Answer & Solution
Answer: Option C
Solution:
The vane shear test is specifically designed for soft to medium clays and provides undisturbed in-situ shear strength directly.
43
Which boring method is NOT ideal for saturated loose sands?
Discuss
Answer & Solution
Answer: Option B
Solution:
Auger boring may cause disturbance or collapse in loose saturated sands due to lack of support from drilling fluids.
44
A geotechnical profile includes:
Discuss
Answer & Solution
Answer: Option A
Solution:
A geotechnical profile typically presents layered information about soil types, rock strata, and groundwater, essential for design.
45
The term "disturbed sample" refers to a soil sample:
Discuss
Answer & Solution
Answer: Option B
Solution:
A disturbed sample has lost its natural structure (fabric), making it unsuitable for certain strength and consolidation tests but still usable for classification.
46
Which field test provides direct data on load-bearing capacity of soil?
Discuss
Answer & Solution
Answer: Option B
Solution:
The Plate Load Test involves applying incremental loads to a steel plate resting on soil to assess actual bearing capacity and settlement behavior under load.
47
What is the primary function of a trial pit?
Discuss
Answer & Solution
Answer: Option C
Solution:
A trial pit (or test pit) is a shallow excavation used to visually inspect and sample soil layers for preliminary investigation.
48
What is the term for the natural water level in soil observed in boreholes?
Discuss
Answer & Solution
Answer: Option B
Solution:
The phreatic surface is the natural groundwater level observed in an unconfined aquifer or borehole.
49
Which drilling method uses a rotating drill bit with drilling mud?
Discuss
Answer & Solution
Answer: Option C
Solution:
Rotary drilling uses a rotating bit and often includes drilling fluid (mud) to flush cuttings and stabilize borehole walls.
50
The pressuremeter test provides data on:
Discuss
Answer & Solution
Answer: Option B
Solution:
A pressuremeter test involves inflating a probe inside a borehole to measure lateral deformation and pressure, used to determine modulus and strength of soil.