Q. The phase difference between the input and output signals for a ‘Compensator device’ used in electromagnetic prospecting to nullify the effect of primary field at the receiver coil is (A) 0° (B) 45° (C) 90° (D) 180° Ans: 180°
Q. Which one of the following statements is INCORRECT with regard to Nuclear Magnetic Resonance (NMR) logging? (ΦNMR – NMR derived total porosity, ΦD – Density porosity) (A)The relaxation time (T2) decreases with decrease in pore size. (B)The ΦNMR is greater than ΦD in a water saturated sandstone formation. (C)The NMR logs provide lithology independent
Q. Which one of the following is CORRECT for the density porosity (fD) and neutron porosity (fN) estimated for a finely interbedded organic-rich, shaly sandstone formation relative to those for a shale-free sandstone formation at shallow depths? (A) ΦN decreases and ΦD increases. (B) ΦN increases and ΦD decreases. (C) Both ΦN and ΦD decrease.
Q. Match the economic deposits in Group I with their occurrence in stratigraphic units in Group II Group I Group II P. Phosphate 1. Sargur Group Q. Manganese 2. Nallamalai Group R. Chromite 3. Udaipur Formation S. Barite 4. Mansar Formation (A) P-1, Q-3, R-4, S-2 (B) P-3, Q-4, R-2, S-1(C) P-2, Q-1, R-4, S-3 (D)
Q. Which one of the following statements is CORRECT about bivalve habitat? (A) Gryphaea is a burrowing variety. (B) Pholas is a free lying form. (C) Lucina is a boring variety. (D) Mytilus is a bysally attached form. Ans: Mytilus is a bysally attached form.
Which one of the following statements is CORRECT about bivalve habitat? Read More »
Q. Which one of the following stratigraphic units represents the CORRECT order of younging? (A) Trichinopally Group – Uttatur Group – Ariyalur Group – Niniyur Group (B) Kopili Formation – Sylhet Formation – Barail Formation – Boka Bil Formation (C) Chinji Formation – Nagri Formation – Dhok Pathan Formation – Tatrot Formation (D) Barakar Formation
Which one of the following stratigraphic units represents the CORRECT order of younging? Read More »
Q. In metamafites, which one of the following mineral assemblages is stable under green schist facies conditions? (A) Albite + Chlorite + Actinolite + Epidote (B) Andesine + Biotite + Hornblende (C) Oligoclase + Biotite + Hornblende (D) Oligoclase + Epidote + Biotite + Hornblende Ans: Albite + Chlorite + Actinolite + Epidote
Q. Which one of the following set of statements regarding the overall nature of marine shelf succession is CORRECT? Statement I: Transgressive systems tract deposit is deepening upward Statement II: Highstand systems tract deposit is deepening upward Statement III: Falling stage systems tract deposit is deepening upward Statement IV: Lowstand systems tract deposit is overall
Q. Which of the following case (s) represent (s) textural inversion in sandstone? Case I: Rounded grains in clayey matrix. Case II: Rounded, but poorly sorted grains. (A) Only case I. (B) Only case II. (C) Both cases I and II. (D) Neither case I nor case II. Ans: Both cases I and II.
Which of the following case (s) represent (s) textural inversion in sandstone? Read More »
Q. The value of salinity, in terms of wt.% NaCl equivalent, of an aqueous saline bi-phase liquid-vapour fluid inclusions is determined by measurement of____during microthermometry. (A) last ice-melting temperature (B) dissolution temperature of halite (C) eutectic temperature (D) homogenization temperature Ans: last ice-melting temperature
