GATE Geology & Geophysics (GG2) 2023 PDF

Geology & Geophysics – Geophysics (GG2) General Aptitude (GA) Q.1 – Q.5 Carry ONE mark Each Q.1 The village was nestled in a green spot, _______ the ocean and the hills. (A) through (B) in (C) at (D) between Q.2 Disagree : Protest : : Agree : _______...

Geology & Geophysics – Geophysics (GG2) General Aptitude (GA) Q.1 – Q.5 Carry ONE mark Each Q.1 The village was nestled in a green spot, _______ the ocean and the hills. (A) through (B) in (C) at (D) between Q.2 Disagree : Protest : : Agree : _______ (By word meaning) (A) Refuse (B) Pretext (C) Recommend (D) Refute Page 1 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.3 A ‘frabjous’ number is defined as a 3 digit number with all digits odd, and no two adjacent digits being the same. For example, 137 is a frabjous number, while 133 is not. How many such frabjous numbers exist? (A) 125 (B) 720 (C) 60 (D) 80 Q.4 Which one among the following statements must be TRUE about the mean and the median of the scores of all candidates appearing for GATE 2023? (A) The median is at least as large as the mean. (B) The mean is at least as large as the median. (C) At most half the candidates have a score that is larger than the median. (D) At most half the candidates have a score that is larger than the mean. Page 2 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.5 In the given diagram, ovals are marked at different heights (h) of a hill. Which one of the following options P, Q, R, and S depicts the top view of the hill? (A) P (B) Q (C) R (D) S Page 3 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.6 – Q.10 Carry TWO marks Each Q.6 Residency is a famous housing complex with many well-established individuals among its residents. A recent survey conducted among the residents of the complex revealed that all of those residents who are well established in their respective fields happen to be academicians. The survey also revealed that most of these academicians are authors of some best-selling books. Based only on the information provided above, which one of the following statements can be logically inferred with certainty? (A) Some residents of the complex who are well established in their fields are also authors of some best-selling books. (B) All academicians residing in the complex are well established in their fields. (C) Some authors of best-selling books are residents of the complex who are well established in their fields. (D) Some academicians residing in the complex are well established in their fields. Page 4 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.7 Ankita has to climb 5 stairs starting at the ground, while respecting the following rules: 1. At any stage, Ankita can move either one or two stairs up. 2. At any stage, Ankita cannot move to a lower step. Let 𝐹(𝑁) denote the number of possible ways in which Ankita can reach the 𝑁 𝑡ℎ stair. For example, 𝐹(1) = 1, 𝐹(2) = 2, 𝐹(3) = 3. The value of 𝐹(5) is _______. (A) 8 (B) 7 (C) 6 (D) 5 Page 5 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.8 The information contained in DNA is used to synthesize proteins that are necessary for the functioning of life. DNA is composed of four nucleotides: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G). The information contained in DNA can then be thought of as a sequence of these four nucleotides: A, T, C, and G. DNA has coding and non-coding regions. Coding regions—where the sequence of these nucleotides are read in groups of three to produce individual amino acids—constitute only about 2% of human DNA. For example, the triplet of nucleotides CCG codes for the amino acid glycine, while the triplet GGA codes for the amino acid proline. Multiple amino acids are then assembled to form a protein. Based only on the information provided above, which of the following statements can be logically inferred with certainty? (i) The majority of human DNA has no role in the synthesis of proteins. (ii) The function of about 98% of human DNA is not understood. (A) only (i) (B) only (ii) (C) both (i) and (ii) (D) neither (i) nor (ii) Page 6 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.9 Which one of the given figures P, Q, R and S represents the graph of the following function? 𝑓(𝑥) = | |𝑥 + 2| − |𝑥 − 1| | (A) P (B) Q (C) R (D) S Page 7 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.10 An opaque cylinder (shown below) is suspended in the path of a parallel beam of light, such that its shadow is cast on a screen oriented perpendicular to the direction of the light beam. The cylinder can be reoriented in any direction within the light beam. Under these conditions, which one of the shadows P, Q, R, and S is NOT possible? (A) P (B) Q (C) R (D) S Page 8 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) PART A: COMPULSORY SECTION FOR ALL CANDIDATES Q.11 – Q.17 Carry ONE mark Each Q.11 Which of the following is a chronostratigraphic unit? (A) Member (B) Stage (C) Acme Zone (D) Period Q.12 During contact metamorphism, with increasing temperature, (A) the ratio of volume to surface area of mineral grains increases. (B) the ratio of volume to surface area of mineral grains decreases. (C) the reaction kinetics becomes slower. (D) hydrous minerals become more stable. Page 9 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.13 The dimension of dynamic viscosity is (A) M1L−1T−2 (B) M1L−1T−1 (C) M0L2T−1 (D) M0L0T0 Q.14 At a depth of about 400 km inside the Earth, which one of the following occurs? (A) Conversion of most silicates to perovskite structure (B) Conversion of plagioclase-peridotite to spinel-peridotite (C) Transformation of olivine to spinel structure (D) Conversion of spinel-peridotite to plagioclase-peridotite Page 10 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.15 Equatorial radius of which one of the following planets is closest to that of the Earth? (A) Mercury (B) Venus (C) Mars (D) Neptune Q.16 Variation of Bouguer anomaly obtained along a profile after applying all the necessary corrections is due to (A) topographic undulation above the datum plane. (B) increase in densities of crustal rocks with depth. (C) lateral density variations. (D) vertical density contrast across Moho. Page 11 of 34 Organizing Institute: IIT Kanpur  Geology & Geophysics – Geophysics (GG2) Q.17 The heat production (Qr) of a granitic rock due to decay of the radioactive elements U, Th and K having concentration CU, CTh, and CK, respectively, is given by the expression 𝑄𝑟 = 𝛼𝐶𝑈 + 𝛽𝐶𝑇ℎ + 𝛾𝐶𝐾 Which one of the following correctly represents the relation between the magnitude of coefficients , ,  (in Wkg−1)? (A) >> (B)  (C) >