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- Question 1 of 16
Given the following matrix equation:
Am×n Xx×1 = bm×1,
the nature of this system of equation isCorrectIncorrect
- Question 2 of 16
Gamma-gamma log applied for estimation of formation density uses incident rays with energy in the range of 0.5 MeV to 2.0 MeV. The interaction of such gamma rays with rocks is governed byCorrectIncorrect
- Question 3 of 16
Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
Assertion: In a well-log survey using fresh-water drilling mud, an oil-bearing sandstone zone can be identified by electrical resistivity and SP logs.
Reason: Oil has high electrical resistivity and the porous nature of sandstone is indicated by negative SP.CorrectIncorrect
- Question 4 of 16
In a sequence of equally thick layers in the subsurface, normally incident reflection coefficients at the three interfaces are: 0.10, 0.15 and 0.18.The amplitude of primary reflection from the deepest interface isCorrectIncorrect
- Question 5 of 16
In a sequence of equally thick layers in the subsurface, normally incident reflection coefficients at the three interfaces are: 0.10, 0.15 and 0.18.The amplitude of the surface multiple that arrives along with the reflection from the deepest interface isCorrectIncorrect
- Question 6 of 16
A thick section of clean sand is identified on a suite of geophysical logs. The deep laterolog reads 4 Ohmm in the upper part of the section and 0.1 Ohm-m in the lower part of the section. The lower part is interpreted to be 100% water-saturated. The resistivity of formation water obtained from SP log is
estimated to be 0.01 Ohm-m.The formation resistivity factor of the clean sand section isCorrectIncorrect
- Question 7 of 16
A gaseous hydrocarbon-bearing zone can be best identified by a combined analysis ofCorrectIncorrect
- Question 8 of 16
In general, geophysical inverse problems dealing with real data obtained from field measurements areCorrectIncorrect
- Question 9 of 16
In vector calculus, Stoke’s theorem relatesCorrectIncorrect
- Question 10 of 16
The radial dependence of the solution of the Laplace equation in cylindrical coordinates is expressed in terms ofCorrectIncorrect
- Question 11 of 16
For an electrostatic field, the Maxwell’s equations reduce toCorrectIncorrect
- Question 12 of 16
Which one of the following functions is used as a source-term to obtain the Green’s function of a boundary value problem?CorrectIncorrect
- Question 13 of 16
The heat flow through a unit area of the Earth’s surface is given by the product ofCorrectIncorrect
- Question 14 of 16
The 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.CorrectIncorrect
- Question 15 of 16
The PKiKP phase denotes the passage of a seismic wave in the Earth asCorrectIncorrect
- Question 16 of 16
Match the items of Group I with those in Group II
Group I Group II
(P) Proton precession magnetometer (1) Induction in a pair of high permeable cores
(Q) Alkali-vapor magnetometer (2) SQUID
(R) Fluxgate magnetometer (3) Radio-spectroscopy
(S) Superconducting magnetometer (4) Nuclear magnetic resonanceCorrectIncorrect