Target GATE & ESE 2022 (Geotechnical Engineering)

 Q.1 In a direct shear test, the shear stress and normal stress on a dry sand sample at failure are 0.6 kg/cm^2 and 1 kg/cm^2 respectively. The angle of internal friction (in degree) of the sand will be nearly

(a) 25            (b) 31            (c) 37            (d) 43

Q.2 In a Mohr's diagram, a point above Mohr's envelope indicates

 (a) Imaginary condition                               (b) Safe condition      

 (c) Imminent failure condition                    (d) Condition of maximum obliquity

Q.3 In the CD test on a saturated soil sample, pore water pressure is zero during

(a) Consolidation stage only                              (b) Shearing stage only

(c) Both consolidation and shearing stages       (d) Loading stage

Q.4 Assertion (A) : In box shear test, the failure plane is predetermined and is horizontal

      Reason (R) : The shear stress is applied in the vertical direction.

(a)                (b)                    (c)                (d)

Q.5 The effective stress friction angle of a saturated cohesionless soil is 38 degree. The ratio of shear stress to normal effective stress on the failure plane is

(a) 0.781         (b) 0.616            (c) 0.488         (d) 0.438

Q.6 A direct shear test was conducted on a cohesionless soil specimen under a normal stress of 200 kN/m^2. The specimen failed at a shear stress of 100 kN/m^2. The angle of internal friction of the soil (degree) is

(a) 26.6            (b) 32.6           (c) 30       (d) 29.5

Q.7 If the effective shear strength parameters of a soil are c' = 10 kPa, and Effective angle of friction = 30 degree, the shear strength on a plane within the saturated soil mass at a point where the total normal stress is 300 kPa and pore water pressure is 150 kPa will be 

(a) 90.5 kPa     (b) 96.6 kPa         (c) 101.5 kPa          (d) 105.5 kPa