Geology and Geophysics
GATE GG-1 year:2023 PYQs
Build your understanding with focused practice from past exam papers.
Questions 61–65 of 65. Imported answers require independent review unless marked reviewed.
Question 61
Open questionGGNAT2 marksNeeds review
A sandstone follows Mohr-Coulomb failure criterion. If the uniaxial compressive strength and the angle of the internal friction of the sandstone are 7 MPa and 30°, respectively, the calculated cohesion of the rock is ______________ MPa. [round off to 2 decimal places]
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At a certain depth in the crust, the maximum and minimum principal compressive stresses are 150 MPa and 75 MPa, respectively, which lead to normal faulting. If the average density of the crust is 2700 kg/m³, the crustal depth of fracture initiation according to Anderson’s theory of faulting is ______________ km. (
m/s²) [round off to one decimal place]Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 63
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A cylindrical soil sample of 10 cm diameter is tested in a constant-head permeameter. A volume of 250 cm³ of water is collected in 5 minutes when the constant-head difference between tapping points 15 cm apart is 5 cm. Considering Darcy flow, the absolute value of coefficient of permeability in cm/s is __________. (
) [round off to 3 decimal places]Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 64
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The minimum anion-to-cation radius ratio at which a 3-fold coordination becomes possible is __________. [round off to 2 decimal places]
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 65
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The mole fraction of jadeite in the pyroxene of composition (Ca₀.₆₆Na₀.₃₃Fe²⁺₀.₁₂₁Fe³⁺₀.₁₂₅Mg₀.₅₄₆Al₀.₂₀₈)Si₂O₆ is __________. [round off to 3 decimal places]
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