GATE GG-1 Applied geology PYQs & Answers

Questions 1–10 of 33. Imported answers require independent review unless marked reviewed.

Which one of the following increases over time when the soil is fully saturated?

Your answerChoose one option.

Infiltration

Runoff

Porosity

Permeability

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The figure below shows an infinite-slope model. If τ and SS denote the driving shear stress and the resisting shear strength, respectively, then τ along the failure plane is __________ × 10³ kg/m² (round off to two decimal places).

[Use: d = 2 m; ρsoil = 2.0 g/cm³; g = 9.8 m/s²]

Diagram for Geology and Geophysics question 60

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A hillslope is shown below. If the area over the failure plane is 50 m

and the weight of the hillslope material (W) is 2000 tons, the Factor of Safety (FS) for this hillslope in dry conditions is ____________

(Cohesion along failure plane = 196 KPa, dip of failure plane = 60°, and internal friction angle = 30°).

(Round off to two decimal places)

Diagram for Geology and Geophysics question 26

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What is the value of the maximum shear stress in a rock, for which the state of stress is given by the following Mohr circle?

Diagram for Geology and Geophysics question 46

Your answerChoose one option.

20 MPa

40 MPa

50 MPa

60 MPa

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A sediment core of 4 cm diameter and 35.81 cm height was collected. This core had an initial weight of 1000.00 g and upon drying the sediment, the weight decreased by 133.75 g. This core has a void ratio of 0.4257, where void ratio is defined as the ratio of volume of void to the volume of solid (Vᵥ/Vₛ). The average density of the sediment in the core is _____ g/cm³.

(Round off to two decimal places)

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The support pressure of 20 kPa is required to stabilize the lose blocks of the Excavation Disturbed Zone (EDZ) at the crown of a circular tunnel with horizontal axis. The EDZ is to be stabilized by inserting rock bolts vertically into the roof. If the working capacity of a bolt is 160 kN, the area of the roof supported by a single bolt in m² is __________ (in integer).

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The in situ stress at a point in a dry sandstone terrain is as follows: σ₁ = 12 MPa and σ₃ = 4 MPa. The pore water pressure (pᵥ) increases by the construction of a reservoir. The failure criterion of the sandstone is given by σ₁′ = 3.48 MPa + 3σ₃′, where σ₁′ and σ₃′ are the effective maximum and minimum principal stresses, respectively. Assuming that the failure occurs at peak stress, the minimum value of pᵥ (in MPa) that will cause the sandstone to fail in situ is _________ (rounded off to two decimal places).

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The bulk density and water content of a soil are 1800 kg/m³ and 18%, respectively. The dry density of the soil calculated from the given information is ____________ kg/m³. [round off to 2 decimal places]

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Which of the following is/are slope stabilization method(s)?

Your answerSelect all correct options. You can choose more than one.

Bolting

Application of shotcrete

Use of impression packer

Use of geogrid

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In the schematic cross-section of a hill, a planar discontinuity intersects a planar slope face. Using kinematic analysis, which of the following conditions favor(s) plane failure to occur?

Diagram for Geology and Geophysics question 59

Your answerSelect all correct options. You can choose more than one.

The dip of the discontinuity surface is less than that of the slope face.

Friction angle on the discontinuity surface is more than the dip of the slope face.

Friction angle on the discontinuity surface is less than the dip of the discontinuity.

The dip direction of the discontinuity surface is same as that of the slope face.

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GATE GG-1 Applied geology PYQs

How to practice Applied geology

Question 11

Question 60

Question 26

Question 46

Question 60

Question 43

Question 63

Question 22

Question 40

Question 59