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Geological Engineering · Q27

Site Investigation and Geotechnical Exploration

Engineering and GATE · Geological Engineering · question 27

Q27

Which instrument helps determine depth to bedrock in geophysical surveys?

A.
Resistivity meter
Answer
B.
Triaxial apparatus
C.
Casagrande cup
D.
Permeameter

Answer: Option A

Solution

Answer: Option A
Solution:
A resistivity meter maps subsurface layers based on electrical resistance, which varies significantly between soil and bedrock.