Q. For a granitic rock mass, joint set number (Jn) = 9, joint water reduction factor (Jw) = 1, joint alteration number (Ja) = 1, stress reduction factor (SRF) = 1, rock quality designation (%) = 84 and joint roughness number (Jr) = 3. The Q-value as per Barton’s Q-system of rock mass classification (year […]

Q. The mass and volume of a natural soil sample are 2.1 kg and 1×10-3 m3, respectively. When fully dried, the mass of the soil sample becomes 2 kg without any change in volume. Assuming the specific gravity of soil particles to be 2.5, and water density of 1000 kg/m3, the degree of saturation of

Q. An inclined cylindrical confined aquifer has coefficient of permeability of 40 m/day. The horizontal distance between two vertical wells penetrating the aquifer is 800 m. The water surface elevations in the wells are 50 m and 45 m above a common horizontal datum. The absolute value of Darcy flux through the aquifer is__________m/day. Ans:

Q. The difference in the number of faces in forms {hkl} and {111} in the holosymmetric class of the isometric system is Ans: 40-40

Q. A basaltic magma has an initial nickel concentration of 300 ppm. Olivine crystallizes from this magma by equilibrium crystallization (Case I) or fractional crystallization (Case II). Then, the absolute value of the difference between the nickel concentrations of the liquids remaining after 25% crystallization in these two cases is.(Use KD,Ni olivine/melt = 10). Ans:

Q. The stretching lineation on the axial plane (S2) of a reclined fold on the S1 foliation makes an angle of 30° with the S1/S2 intersection lineation. The rake of the stretching lineation on the axial plane in degrees is   Ans: 60-60                                 .

Q. During bench blasting in a quarry, 50 kg of an explosive with a yield of 5 MegaJoule/kg is required to break 100 m3 of marble. In this case, the energy expended in breaking a unit volume of marble in MegaNewton/m2 would be Ans: 2.5-2.5

Q. Two coeval primary aqueous biphase fluid inclusions, X (liquid-rich) and Y (vapour-rich), occur in the same grain of the host mineral. Which one of the following situations most likely indicates boiling of the fluid? A. X homogenizes to liquid and Y homogenizes to vapour at different temperatures. B. Both homogenize to liquid at the

Q. Assertion (a): High-temperature, low-pressure metamorphism occurs on the over-riding plate near convergent plate margins. Reason (r): Partial melting in the mantle wedge generates magmas that rise to form the arc. A. (a) is true but (r) is false. B. (a) is false but (r) is true. C. Both (a) and (r) are true and

Q. Which one of the following is the CORRECT chronological sequence for Iron formations? A. Algoma type > Superior type > Rapitan type > Minette type B. Superior type > Algoma type > Rapitan type > Minette type C. Rapitan type > Minette type > Algoma type > Superior type D. Algoma type > Minette