Geology and Geophysics
GATE GG-1 topic:geology PYQs
Build your understanding with focused practice from past exam papers.
Questions 211–220 of 650. Imported answers require independent review unless marked reviewed.
Question 16
Open questionGGMCQ1 markNeeds review
Variation of Bouguer anomaly obtained along a profile after applying all the necessary corrections is due to
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 17
Open questionGGMCQ1 markNeeds review
The heat production (
) of a granitic rock due to decay of the radioactive elements U, Th and K having concentration
,
, and
, respectively, is given by the expression
Which one of the following correctly represents the relation between the magnitude of coefficients
(in
)?Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 18
Open questionGGMCQ2 marksNeeds review
Which one of the following Phanerozoic periods has the shortest duration of time?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 19
Open questionGGMCQ2 marksNeeds review
Based on the given mineral proportions, which one of the following statements is CORRECT?
Rock | Mineral Proportion
X | Olivine : Orthopyroxene : Clinopyroxene :: 50 : 30 : 20
Y | Plagioclase : Alkali feldspar : Quartz :: 25 : 45 : 30
Z | Biotite : Plagioclase : Alkali feldspar : Quartz :: 20 : 25 : 35 : 20
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 20
Open questionGGMSQ2 marksNeeds review
The CORECT sequence(s) of electromagnetic radiations in terms of increasing wavelength is/are
Your answerSelect all correct options. You can choose more than one.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 21
Open questionGGMSQ2 marksNeeds review
Which of the given folds is/are represented by the stereoplot?
Your answerSelect all correct options. You can choose more than one.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 22
Open questionGGNAT2 marksNeeds review
The bulk density and water content of a soil are 1800 kg/m³ and 18%, respectively. The dry density of the soil calculated from the given information is ____________ kg/m³. [round off to 2 decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 23
Open questionGGNAT2 marksNeeds review
In a seismic reflection survey over a two-layered Earth model having densities and seismic velocities ρ₁=2000 kg/m³, V₁=1800 m/s for the first layer and ρ₂=3000 kg/m³, V₂=2100 m/s for the second layer, the normal incidence P-wave reflection coefficient is ______________. [round off to 3 decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 24
Open questionGGNAT2 marksNeeds review
The resistivity of a rock, 100% saturated with water of resistivity 0.25 Ωm, is 60 Ωm. Assuming tortuosity and cementation exponents to be 1 and 2, respectively, the porosity of the rock is _________ (in %). [round off to 2 decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 25
Open questionGGNAT2 marksNeeds review
Let us consider that a student misses canceling the self-potential between potential electrodes before injecting current into the subsurface, in a Wenner electrical resistivity survey using DC resistivity meter over a horizontally stratified Earth. In direct and reverse modes of measurement (when current flows from C1 to C2 and C2 to C1, respectively) with the same magnitude of current flow, the potential differences recorded are +158 mV and −214 mV, respectively. The self-potential between the potential electrodes before injecting current was ________mV. [in integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer