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A confined sandy aquifer has a thickness of 10 m and transmissivity of 0.75 m2 per day. Its hydraulic conductivity is _____ m/day. (-Gate geology and geophysics 2014)1 AnswerA fully penetrating tube well in a 30 m deep confined aquifer with hydraulic conductivity of 4×10^-4m s^-1has 50 L s^-1 discharge. The drawdown and radius of influence are 5 m and 250 m, respectively. Diameter of the tube well in mm is ____________ 1 AnswerSpecific discharge of 1 cm per day is observed in a porous medium where hydraulic head difference is 0.5 m and flow length is 20 m. Calculate the hydraulic conductivity (in m/day). GATE-Geology and Geophysics-Question-20121 AnswerMetal content (in metric tonnes) of an ore having specific gravity and assay values of 2.86 and 1.49 % respectively in a mining block 40 m long, 30 m wide and with an average thickness of 2.13 m is _______. (-Gate geology and geophysics 2014)1 AnswerCompute the coefficient of anisotropy from the following parameters estimated from a Vertical Electric Sounding (VES) survey. (-Gate geology and geophysics 2014)1 AnswerThe heat flow through a unit area of the Earth’s surface is given by the product of: (-Gate geology and geophysics 2014)1 AnswerThe S-wave velocity of a medium having a Poisson’s ratio and a P-wave velocity of 0.5 and 3 km/s respectively is _______km/s. (-Gate geology and geophysics 2014)1 AnswerWhich physical property of the medium governs the response of Ground Penetrating Radar (GPR)? GATE-Geology and Geophysics-Question-20121 AnswerA sandstone bed whose attitude is 090°, 30° is exposed on a flat surface. The true thickness of the bed is 100 m. The width of the outcrop of the sandstone bed along a N-S traverse on the ground is ________ m. -gate Geology & Geophysics 2017 1 AnswerWhich one of the following is the best suited mining method for a low-dipping, tabular-shaped, hard and compact ore body with 2 to 2.5 m thickness sandwiched between hard and compact roof and floor rock? (-Gate geology and geophysics 2014)1 Answer In the estimation of magnetotelluric transfer function, the time-independent conservation of current at conductivity discontinuities will result in -gate Geology & Geophysics 2017 1 AnswerA sandstone bed dipping 30° has an outcrop width of 20 m in a flat terrain. What is the true thickness (in m) of the bed? GATE-Geology and Geophysics-Question-20121 AnswerIn an ore mine exposing stratified sulfide ore with sulfide bands having thickness between 10 and 100 cm, which one of the following sampling methods is the most appropriate? (-Gate geology and geophysics)1 AnswerWhich one of these is NOT a source of sufficient water supply but can transmit certain quantity of water on a regional scale due to leakage? GATE-Geology and Geophysics-Question-20121 AnswerChoose the most appropriate word from the options given below to complete the following sentence. - Gate Geology and Geophysics 2014 (General Aptitude section)1 AnswerSelect the copper ore minerals from the following: (P) Chalcopyrite (Q) Pyrite (R) Pyrrhotite (S) Bornite (T) Sphalerite (U) Chalcocite (-Gate geology and geophysics 2014)1 AnswerThe reflection coefficient at the interface between two layers of resistivities 9 Ωm and 1 Ωm respectively is: (-Gate Geology and Geophysics 2014)1 AnswerThe convolution of two finite length sequences xn = [1, 0, -2] and yn = [1, -1] is: (-Gate geology and geophysics 2014)1 AnswerCirques are formed by: (-Gate geology and geophysics 2014)1 AnswerThe Fourier transform and integral of the Dirac delta function respectively are: (-Gate geology and geophysics 2014)1 Answer