Q12
Which of the following methods is used in preliminary site investigation?
A.
Soil fertilization
B.
Chemical etching
C.
Magnet therapy
D.
Resistivity survey
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Resistivity surveys are geophysical methods used to detect subsurface features. They help map groundwater, bedrock, and voids before excavation. Correct Answer: Resistivity survey.