GATE GG-1 format:nat PYQs & Answers — Page 6 — Exam Papers

Questions 51–60 of 155. Imported answers require independent review unless marked reviewed.

Topic practice 155 questionsPage 6 of 16

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]

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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]

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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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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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The average bulk density of a fully saturated sandstone reservoir with a fractional porosity of 0.23 is _____ g/cc. [round off to 2 decimal places]

[Assume matrix density for sandstone = 2.63 g/cc and fluid density = 1.05 g/cc]

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For a productive alluvial aquifer with hydraulic conductivity = 105 m/day and hydraulic gradient = 0.01, the flow rate is ________ m/day. [round off to 2 decimal places]

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The difference in arrival times of P- and S-waves generated by an earthquake and recorded at a seismological station is one second. Assuming a homogeneous and isotropic Earth, a P-wave velocity (Vₚ) of 3 km/s, the ratio of P- to S-wave velocities (Vₚ/Vₛ) of 2.0, the distance between the station and the hypocenter is __________ km. [round off to 1 decimal place]

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Assuming the rate of rotation of the Earth is 7.27 × 10⁻⁵ radians/s and the radius of Earth is 6371 km, the centrifugal acceleration at 60° latitude for a spherical rotating Earth is _____ × 10⁻³ m/s². [round off to 1 decimal place]

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The angle of inclination of the remanent magnetization of a volcanic rock measured at a location is 45°. The magnetic latitude of the location of the volcanic rock at the time of its magnetization is ________ N. [round off to 1 decimal place]

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The strike and dip of the axial plane of a reclined fold is 022° and 28° SE, respectively. The plunge direction (in whole circle bearing) of the axis of the reclined fold is _____ degrees. [in integer]

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