GATE GG-1 topic:geology PYQs & Answers — Page 56

Questions 551–560 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 56 of 65

Which one of the following corrections is always added during reduction of the observed gravity data?

Your answerChoose one option.

Latitude

Free-air

Bouguer

Terrain

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The magnitudes of the total geomagnetic field at the equator and pole are denoted by B_E and B_P, respectively. Which one of the following is TRUE?

Your answerChoose one option.

B_P ≈ 4 B_E

B_P ≈ 2 B_E

B_P ≈ B_E

B_P ≈ 1/2 B_E

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Assume a flat earth with crustal thickness of 35 km and average crustal and upper mantle P-wave velocities of 6.4 km s

and 8.1 km s

, respectively. The minimum distance from the epicenter of a near surface earthquake at which Pₙ-waves are observed is ________ km.

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Given that the velocity of P-waves in a sandstone matrix is 5600 m/s and that in oil is 1200 m/s, the velocity of P-wave propagation in oil saturated sandstone with 30% porosity is ________ m/s. (Use Wyllie time average equation.)

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If the total porosity of a soil is 20%, its void ratio (%) is ________.

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Which one of the following Himalayan lithounits predates India-Eurasia collision?

Your answerChoose one option.

Kasuli sandstone

Ranjit Pebble Slate

Annapurna granite

Lower Kewra sandstone

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Which one of the following ore minerals shows internal reflection?

Your answerChoose one option.

Orpiment

Magnetite

Pyrite

Molybdenite

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Which one is CORRECT for the following equilibrium reaction between quartz and magnetite: Si¹⁶O¹⁶O + Fe₃¹⁶O₃¹⁸O = Si¹⁶O¹⁸O + Fe₃¹⁶O₄ ?

Your answerChoose one option.

100 ln α = Δqtz-mag where α = K^(1/n) (K is the equilibrium constant at the specified temperature and n is a constant quantity)

100 ln α = Δqtz-mag where α = K^n (K is the equilibrium constant at the specified temperature and n is the number of exchange atomic sites)

(ln α/100) = Δqtz-mag where α = K^(1/n) (K is the equilibrium constant at the specified temperature and n is a constant quantity)

100 ln α = Δqtz-mag where α = K^(1/n) (K is the equilibrium constant at the specified temperature and n is the number of exchange atomic sites)

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Match the modes of life (listed in Group I) with the corresponding bivalve genera (listed in Group II).

Group I P. Burrowing Q. Recumbent unattached R. Byssally attached S. Swimming

Group II

Mytilus

Pecten

Mya

Gryphaea

Your answerChoose one option.

P-4, Q-3, R-2, S-1

P-3, Q-4, R-1, S-2

P-2, Q-3, R-1, S-4

P-3, Q-1, R-4, S-2

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Based on the hypothetical litholog given below that shows a continuous succession of sedimentary rocks, which one of the following statements is CORRECT?

Diagram for Geology and Geophysics question 30

Your answerChoose one option.

The rocks range from Cambrian to Cretaceous and show change in depositional environment from marine to continental.

The rocks range from Cambrian to Triassic and show change in depositional environment from marine to continental.

The rocks range from Cambrian to Cretaceous and show change in depositional environment from continental to marine.

The rocks are Palaeozoic in age and show change in depositional environment from marine to continental.

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GATE GG-1 topic:geology PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30