GATE GG-1 purpose:exam-prep PYQs & Answers — Page 49

Questions 481–490 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 49 of 65

The difference in the mobility of ions in the electrolyte and electrons in metallic conductors in the sub-surface due to applied external electric field gives rise to ______.

Your answerChoose one option.

electrode polarization

membrane polarization

electro-kinetic potential

electro-chemical potential

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A high frequency acoustic wave propagating in a gas saturated sandstone formation exhibits an increase in ______.

Your answerChoose one option.

frequency

velocity

wavelength

wave number

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Which one of the following log methods uses a radioactive source in the sonde?

Your answerChoose one option.

Natural Gamma ray

Gamma-Gamma

Natural Gamma ray spectroscopy

Nuclear Magnetic Resonance (NMR)

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Isodynamic contours of the geomagnetic field represent lines of equal ______.

Your answerChoose one option.

inclination

declination

total field intensity

magnetic potential

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A Very Low Frequency (VLF) electromagnetic survey is conducted for the delineation of 2-D conducting mineralization located at 50 m depth from the surface with different geological formations as the overburden layer. For which of the following geological overburden layers given below, will the VLF method fail to yield response?

Your answerChoose one option.

Granite

Snow

Dry sand

Saline water saturated sand

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Assuming Airy isostatic compensation, the depth to the Moho from a point located 2 km above the mean sea level is ______ km. (round off to 1 decimal place). (The depth of compensation T for the crust at mean sea level is 30 km, the density of crust and upper mantle are 2.67 gm/cc and 3.30 gm/cc, respectively).

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On Survey of India Toposheet number 45

, the distance between two points is 18 cm. The actual ground distance between these two points is ______km.

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For a dam site investigation, drilling was carried out up to a depth of 20 m. The total length of recovered core pieces, each over 100 mm, add up to 16 m. The Rock Quality Designation (RQD) of the foundation rock mass is ______%.

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Given that

, the

is ______

(round off to 1 decimal place).

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The shear wave velocity in an igneous rock with a density of 2.7 gm/cc and rigidity modulus of 24.3 GPa is ______ km/s. (round off to 1 decimal place).

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GATE GG-1 purpose:exam-prep PYQs

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