Q21
Which rock mass classification system is widely used for tunnels?
A.
Atterberg limits
B.
Terzaghi system
C.
RMR (Rock Mass Rating)
AnswerD.
Casagrande method
Answer: Option C
Solution
Answer: Option C
Solution:
The RMR system evaluates rock mass quality using parameters like UCS, joint spacing, condition, and water conditions.It guides tunnel support design.