In the Hoek-Brown failure criterion, which parameter is NOT required?
A. Uniaxial compressive strength
B. Joint orientation
C. Geological Strength Index
D. Material constant mi
Answer: Option B
Solution (By Examveda Team)
Joint orientation is not directly used in the Hoek-Brown criterion, which is an empirical model using UCS, GSI, and mi to estimate rock mass strength.This Question Belongs to Geological Engineering >> Rock Mechanics And Rock Engineering
What does UCS stand for in rock mechanics?
A. Ultimate Compression Shear
B. Uniaxial Compressive Strength
C. Uniform Core Strength
D. Unconfined Compression Standard
Which test is commonly used to determine tensile strength of rock?
A. Point load test
B. Slake durability test
C. Brazilian test
D. UCS test
Rock mass rating (RMR) system is used for:
A. Water quality classification
B. Rock load estimation
C. Soil permeability analysis
D. Slope stability in soils
What does the term �anisotropy� in rock mechanics refer to?
A. Isolated fractures
B. Uniform grain structure
C. Direction-dependent properties
D. Complete randomness
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