List of top Geology Questions on Applied Geology

Neutron-rich unstable nuclides undergo

A rock element during deformation, experienced a pressure change of $5×10^4 N/m^2$, due to which its volume changed from 4 cm3 to 3.9 cm3. The bulk modulus of the rock is ________ ×$10^6 N/m^2$. (In integer)

A partially saturated soil sample has a volume of 1200 cc. The volume of water present in the sample is 300 cc. The mass of solid in the sample is 1908 g and the particle density is 2.65 g/cc. The porosity (n) of the soil sample is _______ %. (In integer)

The fraction of $^{24}𝑁𝑎_{11}$ atoms remaining after a decay interval of 5.0 hours will be ______ . (Round off to three decimal places) (Use $t_{1/2}$ = 15.0 hours)

The lithostatic pressure at a depth of 36.5 km in the continental crust having an average density of 2800 $kg/m^3$, is _____ GPa. (Round off to the nearest integer) (Use g = 9.8 $m/s^2$)

The geothermal gradient in the continental crust is 0.02 ⁰C/m. If the surface temperature is 25 ⁰C, the temperature at a depth of 18 km from the surface is ________ ⁰C. (In integer)

An aquifer has a cross-sectional area of 10 $m^2$ and a hydraulic conductivity of 0.25 cm/s. The volume of water that will flow per second through the aquifer for a hydraulic gradient of 0.04 is _____ $cm^3$. (Round off to three decimal places)

The mean flow velocity of water in an open channel having an average depth of 0.2 m, and with Froude Number 4, is ________ m/s. (Round off to one decimal place) (Use $g = 9.8 ms^{-2}$)

Darcy’s law quantifies the volume of groundwater flow

The saturated thickness of an unconfined aquifer is defined by the distance between

Which one of the following was emplaced in the Neoproterozoic time?

Which one of the following is NOT a sediment-gravity flow?

Which one of the following options is the CORRECT sequence of seismic waves in order of arrival time recorded on a seismogram after an earthquake?

Which one of the following relationships between the topographic contour value (t) and the stratum contour value (x) of a bed must be TRUE for an outcrop of the bed to occur on the topographic surface?

If the angular aperture of a 20X objective is 46°, the numerical aperture of the water immersion objective is_____. (Round off to two decimal places) (Use RI of water = 1.33)

Which of the following is/are used to estimate the strength of a rock mass?

The water table over an area of 1 km² was lowered by 4 m. If the porosity of rock is 30% and the specific retention is 10%, the change in the groundwater storage is ______ × 10³ m³. (In integer)

The \(\frac{^{143}Nd}{^{144}Nd}\ \text{and}\ \frac{^{147}Sm}{^{144}Nd}\) ratios of a rock are 0.516 and 0.389, respectively. The rock evolved as a closed system. As per the exact parent-daughter relationship \(\frac{^{143}Nd}{^{144}Nd}\) equation, the ratio of the rock 4.6 × 10⁹ years ago was ______. (Round off to three decimal places)
(Use decay constant for ¹⁴⁷Sm = 6.54 × 10^-12 y^-1)

A one-meter deep and sheet-like waterflow on a sandy beach developed antidunes. The minimum velocity of the waterflow was _______m/s. (Round off to two decimal places) (Use g = 10 m/s²)

A water flow transports spherical particles (diameter = 2mm; density = 3g/cm³) in suspension mode. If additional particles of density 2g/cm³ are added into the flow, then the diameter of the particles that can be transported without a change in terminal fall velocity, using Stokes law, is _____mm. (Round off to two decimal places) (Use density of water = 1g/cm³)

The hydraulic conductivity of a 100cm long cylindrical core is estimated as 1.2cm/min when hydraulic head difference is 20cm in an experimental setup. If the effective porosity of the core is 20%, then, assuming steady state Darcy flow, the average interstitial velocity of groundwater through the core is _____m/day. (Round off to two decimal places)

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?

In porphyry copper deposits, the order of alteration zones from the intrusive body outwards is: