Geology and Geophysics
GATE GG-1 Principles and applications of gravity, magnetic, electrical, electromagnetic, seismic and radiometric methods of prospecting for oil, mineral and ground water; introductory well logging PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 36. Imported answers require independent review unless marked reviewed.
Question 22
Open questionCNAT1 markNeeds review
The transmission coefficient for the vertically incident seismic wave at the interface between Layer 1 and Layer 2 given in the figure is ______. (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 questionCNAT1 markNeeds review
The ‘geometrical factor’ for the electrode configuration given below will be ______ m. (Round off to 2 decimal places) (Use
)(
and
are current electrodes;
and
are potential electrodes)
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 questionCNAT1 markNeeds review
In an electromagnetic measurement, the resultant field shows a phase lag of 30° with respect to the primary field at the receiver coil. The ratio of Inphase to Quadrature component of the resultant field is ______. (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 15
Open questionPART AMCQ1 markNeeds review
Which one of the following is only a correction and not a reduction in the computation of gravity anomalies with respect to a datum?
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 16
Open questionPART AMCQ1 markNeeds review
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.
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 questionPART AMCQ1 markNeeds review
A high frequency acoustic wave propagating in a gas saturated sandstone formation exhibits an increase 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 questionPART AMCQ1 markNeeds review
Which one of the following log methods uses a radioactive source in the sonde?
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 questionPART AMCQ1 markNeeds review
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.
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 5
Open questionPART-AMCQ1 markNeeds review
The geometrical factor for the following electrode configuration is
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 6
Open questionPART-AMCQ1 markNeeds review
Which one of the following geophysical methods uses the physical property ‘Dielectric Constant’?
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 answer