CSIR Earth Sciences Solved June 2015

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PART-A

Q-1. In each of the following group of words is a hidden number, based on which you should arrange them in ascending order. Pick the right answer.

A. Tinsel event

B. Man in England

C. Good height

D. Last encounter

1. A, B, C,D

2. C, D, B, A

3. A, C, D, B

4. C, D, B, A

View Answer with Explanation

Q-2. Let m and n be two positive integers such that m+n+mn=118 Then the value of m+n is

1. Not uniquely determined

2. 18

3. 20

4. 22

View Answer with Explanation

Q-3. AB is the diameter of a circle. The chord CD is perpendicular to AB intersecting it at P. If CP=2 and PB=1, the radius of the circle is

AB is the diameter of a circle. The chord CD is perpendicular to AB intersecting it at P.

AB Is the Diameter of a Circle.

AB is the diameter of a circle. The chord CD is perpendicular to AB intersecting it at P.

1. 1

2. 2.5

3. 2

4. 5

View Answer with Explanation

Q-4. What is angle x in the schematic diagram given below?

 Diagram given angle x in the schematic

Angle X in the Schematic

Diagram given angle x in the schematic

1. 60

2. 50

3. 40

4. 30

View Answer with Explanation

Q-5. From a group of 40 players, a cricket team of 11 players is chosen. Then, One of the eleven is chosen as the captain of the team. The total number of ways this can be done is

[(mn) below means the number of ways n object can be chosen from m objects]

1. (4011)

2. 11(4011)

3. 29(4011)

4. (3911)

View Answer with Explanation

Q-6. Starting from a point A you fly one mile south, then one mile east, then one mile north which brings you back to point A. Point A is NOT the north pole. Which of the following MUST be true?

1. You are in the Northern Hemisphere

2. You are in the Eastern Hemisphere

3. You are in the Western Hemisphere

4. You are in the Southern Hemisphere

View Answer with Explanation

Q-7. A 3 m long car goes past a 4 m long truck at rest on the road. The speed of the car is 7 m/s. The time taken to go past is

1. 47s

2.1s

3. 74s

4. 107s

View Answer with Explanation

Q-8. Jar W contains 40 white marble and jar B contains 40 black marbles. Ten black marbles from B are transferred to W and mixed thoroughly. Now, ten randomly selected marbles from W are put back in jar B to make 40 marbles in each jar. The number of black marbles in W

1. Would be equal to the number of white marbles in B

2. Would be more than the number of white marbles in B

3. Would be less than the number of white marble in B

4. Cannot be determined from the information given

View Answer with Explanation

Q-9. Consider 3 parallel strips of 10 m width running around the Earth, parallel to the equator; A1 at the Equator, A2 at the Tropic of Cancer and A3 at the Arctic Circle. The order of the areas of the strips is

1. A1<A2<A3

2. A1=A2>A3

3. A1>A2=A3

4. A1>A2>A3

View Answer with Explanation

Q-10. If

aNs

eFI

gHM

Then nS?

1. T

2. A

3. L

4. K

View Answer with Explanation

Q-11. How many non-negative integers less than 10,000 are there such that the sum of the digits of the number is divisible by three?

1. 1112

2. 2213

3. 2223

4. 3334

View Answer with Explanation

Q-12. Of three persone A,B and C, one always lies while the others always speak the truth. C asked A,” Do you always speak the truth, yes or no?” He sais something that C could not hear. So, C asked B, “what did A say?” B replied, “A said No”. So, who is the liar?

1. A

2. B

3. C

4. Cannot be determined

View Answer with Explanation

Q-13.

Two ants, initially at diametrically opposite points A and B on a circular ring of radius R, start crawling towards each other.

Opposite Points a and B on a Circular

Two ants, initially at diametrically opposite points A and B on a circular ring of radius R, start crawling towards each other.

Two ants, initially at diametrically opposite points A and B on a circular ring of radius R, start crawling towards each other. The speed of the one at a half of that of the one at B. the point at which they meet is at a straight line distance of

1. R from A

2. 3R2fromA

3. RfromB

4. 3R2fromB

View Answer with Explanation

Q-14.

Based on the graph

Based on the Graph

Based on the graph

Based on the graph, which of the following statements is NOT true?

1. Number of gold medals increased whenever total number of medals increased

2. Percentage increase in gold medals in 2010 over 2006 is more than the corresponding increase in total medals

3. Every time non-gold medals together account for more than 50% of the total medals

4. Percentage increase in gold medals in 2010 over 2006 is more than the corresponding increase in 2002 over 1998

View Answer with Explanation

Q-15. A pyramid shaped toy is made by tightly placing cubic blocks of 1×1×1cm3 . The base of the toy is a square 4×4cm2. the width of each step is 0.5 cm. How many blocks are required to make the toy?

1. 30

2. 34

3. 36

4. 40

View Answer with Explanation

Q-16. Information in DNA is in the form of sequence of 4 base namely A, T, G and C. The proportion of G is the same as that of C, and that of A is the same as that of T. Which of the following strands of DNA will potentially have maximum diversity (i.e, maximum information content per base)?

1. Length 1000 bases with 10% G

2. Length 2000 bases with 10% A

3. Length 2000 bases with 40% T

4. Length 1000 bases with 25% C

View Answer with Explanation

Q-17. Two plane mirrors facing each other are kept at 60° to each other. A point is located on the angle bisector. The number of images of the point is

1. 6

2. 3

3. 5

4. Infinite

View Answer with Explanation

Q-18. I bought a shirt at 10% discount and sold it to a friend at a loss of 10%. If the friend paid me Rs. 729.00 for the shirt, what was the undiscounted price of the shirt?

1. Rs. 900

2. Rs. 800

3. Rs. 1000

4. Rs. 911.25

View Answer with Explanation

Q-19. A single celled spherical organism contains 70% water by volume. If it loses 10% of its water content, how much would its surface area change by approximately?

1. 3%

2. 5%

3. 6%

4. 7%

View Answer with Explanation

Q-20. Suppose

(1) x=4

(2) Then x4=x242(asbothsidesarezero)

(3) Therefore (x4)=(x4)(x+4)frombothsides

(4) 1=(x+4)

(5) Then x=3

Which is the wrong step?

1. 1 to 2

2. 2 to 3

3. 3 to 4

4. 4 to 5

View Answer with Explanation

PART ‘B’

Q-21. Which one of the following milankovitch periodicities in climate is due to the precession of the Earth?

1. 41,000 years

2. 23,000 years

3. 100,000 years

4. 10,000 years

View Answer with Explanation

Q-22. The benthic organisms living at the deep ocean floor get oxygen due to

1. Weathering of oxide minerals at sea floor

2. Submarine volcanic eruptions

3. Sinking of Polar waters to sea floor

4. Decay of organic matter at sea floor

View Answer with Explanation

Q-23. Mariana trench was formed due to

1. Divergence of oceanic plates

2. Divergence of of oceanic and continental plates

3. Convergence of oceanic plates

4. Convergence of continental plates

View Answer with Explanation

Q-24. Which one of the following statements is true with regard to global precipitation during glacial/interglacial periods?

1. In glacial periods there was more precipitation

2. In glacial periods there was less precipitation

3. Precipitation remained the same in both the periods

4. Precipitation increased in polar areas during glacial periods

View Answer with Explanation

Q-25. The rate of sediment accumulation is minimum at:

1. Continental shelves

2. Continental slopes

3. Continental rises

4. Deep-ocean floor

View Answer with Explanation

Q-26.Which one of the following tidal patterns characterizes the West coast of India?

1. One high and one low of equal magnitudes

2. One high and one low of unequal magnitudes

3. Two high and two low of equal magnitudes

4. Two high and two low of unequal magnitudes

View Answer with Explanation

Q-27. In the tropical ocean, which one of the following CAN NOT increase the mixed layer thickness?

1. Winds

2. Solar heating

3.Wave height

4. Evaporation

View Answer with Explanation

Q-28. Tropical Easterly jet Stream is the strongest during the

1. Winter months over Northern Indian region

2. Summer months over Southern Indian region

3. Winter months over southern Indian region

4. Summer months over Northern Indian region

View Answer with Explanation

Q-29. El Nino Southern Oscillation (ENSO) is an

1. Oceanic process

2. Atmospheric process

3. Ocean-atmospheric process

4. Ocean-atmosphere-land process

View Answer with Explanation

Q-30. For a mineral M, the peak for the (110) plane appears at 2θ=X in its XRD pattern, when Cu target is used. If Fe target is used the same peak appears at 2θ=Y. If λFe>λCu

1. XY

2. X>Y

3. XY

4. X<Y

View Answer with Explanation

Q-31. The Global annual mean temperature in the Cretaceous was

1. Same as that today

2. 3°Cto7°C lower than that today

3. >10°C higher than that today

4. 3°Cto7°C higher than that today

View Answer with Explanation

Q-32. Roughly 11000 years from now, when the Earth will be at perihelion, there will be

1. Summer in northern hemisphere in December

2. Summer in southern hemisphere in December

3. Winter in northern hemisphere in December

4. No Change in climate from today in both northern and southern hemispheres

View Answer with Explanation

Q-33. Atmosphere of planet Mars is almost entirely made up of CO2 . But the surface temperature of Mars is less than that of the Earth because:

1. CO2 does not act as a greenhouse gas in the absence of other gasses

2. Of absence of ozone

3. Of absence of volcanic activity

4. Mars has a larger orbit than that of the Earth

View Answer with Explanation

Q-34. Chemical composition of Earth’s core is similar to that of

1. Chondritic meteorites

2. Achondritic meteorites

3.carbonaceous Chondritic

4. Iron meteorites

Answer

Q-35. The correct match of items in the lists I and II is.

Correct match of items
Correct match of items

I

II

A

Isobar

P

Equal temperature

B

Isohyets

Q

Equal Age

C

Isotherm

R

Equal Volume

D

Isochrones

S

Equal pressure

T

Equal precipitation

Table title: Match of items in the lists I and II

Table Description: Match of items in the lists I and II

1. A-s; B-T; C-P; D-Q

2. A-T; B-S; C-Q; D-P

3. A-S; B-P; C-Q; D-R;

4. A-R; B-P; C-S; D-T;

View Answer with Explanation

Q-36. Which one of the following minerals in the Moh’s scale of hardness is a silicate?

1. Apatite

2. Fluorite

3. Topaz

4. Corundum

View Answer with Explanation

Q-37. Which one of the following is not a plate boundary?

1. Carlsberg Ridge

2. South East Indian Ridge

3. East Pacific Rise

4. Ninety East Rdge

View Answer with Explanation

Q-38. Which one of the following statements is NOT true?

1. P-waves are body waves

2. Love waves are body waves

3. S-waves accelerate in the mantle

4. Rayleigh waves are surface waves

View Answer with Explanation

Q-39. Which one of the following is situated at one of the foci of the orbit of Mars?

1. Sun

2. Venus

3. Mercury

4. Jupiter

View Answer with Explanation

Q-40. Which of the following statement about river channel velocity is correct?

1. Velocity is high near the channel bed

2. Average flow velocity at a cross section occurs at 0.6 depth

3. Minimum velocity is observed at the water surface in mid-stream

4. Velocity is lower over steeper gradients

View Answer with Explanation

Q-41. The highest features on a floodplain are

1. Point bars

2. Meander scroll

3. Back swamps

4. Natural Levees

View Answer with Explanation

Q-42. Which one of the following types of mass movement indicates movement en masse along a structural surface, such as a bedding or foliation plane?

1. Debris Avalanche

2. Debris flow

3. Rotational slide

4. Translational slide

View Answer with Explanation

Q-43. Smectite is the dominant clay in areas with

1. High rainfall and good drainage

2. High rainfall and poor drainage

3. Low rainfall and good drainage

4. Low rainfall and poor drainage

View Answer with Explanation

Q-44. Dome-Shaped hills and corestones are commonly associated with

1. Basalt

2. Andesite

3. Granite

4. Sandstone

View Answer with Explanation

Q-45. Transsport limited slopes are characterized by

1. Thick cover of regolith

2. Thin cover of regolith

3. NO regolith

4. Fresh rock

View Answer with Explanation

Q-46. Which one of the following is NOT a common set of secondary minerals formed by weathering?

1. Hematite, Goethite, Gibbsite

2. Goethite, Gibbsite, Gypsum

3. Gibbsite, Hematite, Kaolinite

4. Kaolinite, Goethite, Gibbsite

View Answer with Explanation

Q-47. Which of the following sediment types has the highest permeability?

1. Mud

2. Mixture of sand and mud

3. Well sorted sand

4. Poorly sorted sand

View Answer with Explanation

Q-48. Higher rate of silicate weathering leads to

1. Increase in CO2 in atmosphere

2. Decrease in CO2 in atmosphere

3. Increase in O2 in atmosphere

4. Decrease in moisture content in atmosphere

View Answer with Explanation

Q-49. Elevated land masses undergoing subsidence are associated with strong

1. ve Isostatic and +ve Bouguer anomalies

2. ve Isostatic and ve Bouguer anomalies

3. +ve Isostatic and ve Bouguer anomalies

4. +ve Isostatic and +ve Bouguer anomalies

View Answer with Explanation

Q-50. An electromagnetic wave at 100 Hz can penetrate to a depth of 100m. Then, an electromagnetic wave of 400 Hz will penetrate to a depth of

1. 2.5 m

2. 50m

3. 200m

4. 400m

View Answer with Explanation

Q-51. A 20 cm cube of a rock measures a resistance of 200 ohm. The resistivity of the rock is

1. 4000 ohm.m

2. 1000 ohm.m

3. 800 ohm.m

4. 40 ohm.m

View Answer with Explanation

Q-52. If the sun were to lose some mass, then the duration of an year on the Earth would be

1. Longer, with the length of the day being the same

2. Shorter, with the length of the day being the same

3. of the same length, the length of the day being larger

4. of the same length, the length of the day being shorter

View Answer with Explanation

Q-53. The magnetic field of a planet at its north pole is 2.4 Gauss. The magnetic field on its magnetic equator is

1. 4.8 Gauss

2. 2.4 Gauss

3. 1.2 Gauss

4. 0.6 Gauss

View Answer with Explanation

Q-54. A cubic wooden block of density 0.8 gm/cc when floats in water have an exposure of 2 cm above the water level. The side of the cube is

1. 10 cm

2. 18 cm

3. 6 cm

4. 4 cm

View Answer with Explanation

Q-55. The Natural Remanent Magnetization of a rock unit is found to be 30°W of the present north. The inference is that the land mass

1. Moved northwards by 30°

2. Moved southwards by 30°

3. Rotated westward by 30°

4. Rotated eastward by 30°

View Answer with Explanation

Q-56. The yield stress of a rook is 100mpa . What would be the behavior of rock when it is loaded gradually up to 100mpa and then the stress is suddenly removed?

1. The rock will change its shape by accommodating some amount of strain.

2. The rock will fail by fracturing

3. The rock will flow continuously

4. The rock will return to its original shape instantaneously.

View Answer with Explanation

Q - 57. The degree of freedom at the eutectic point of a binary system is:

1. 0

2. 1

3. 2

4. 3

View Answer with Explanation

Q-58. The horizontal equivalent, measured between two successive strike lines on a map, for a vertical bed is:

1. Zero

2. Infinitely large

3. Moderately large

4. Variable

Q-59. The remote sensing satellite measures back radiation from the ocean surface. This back radiation is independent of the concentration of

1. Living phytoplankton

2. Suspended particles

3. Dissolved organic matter

4. Dissolved inorganic matter

Q:-60. Which one of the following is not a part of the oceanic subtropical gyre?

1. Gulf stream

2. Kuroshio

3. North equatorial current

4. Antarcation circum polar current

View Answer with Explanation

Q-61. The order of molar abundance in sea water is in the sequence

1. Na+>Cl>Mg2+>SO42

2. Cl>Mg2+>Na+>SO42

3. Cl>Na+>Mg2+>SO42

4. Na+>Cl>SO42>Mg2+

Q-62. The residence time (τ) of the elements Mg , Sr and Ba in seawater is in the sequence:

1. τMg>τCg>τSr>τBa

2. τMg>τSr>τCa>τBa

3. τCa>τBa>τSr>τMg

4. τSr>τMg>τBa>τCa

View Answer with Explanation

Q-63. The most non-conservative element in the sea is

1. Lithium

2. Uranium

3. Fluorine

4. Thorium

View Answer with Explanation

Q-64. Coral reef ecosystems are oases of life in the oceans, because of their ability to

1. Sequester a lot of atmospheric CO2

2. Support a lot of biodiversity

3. Produce a lot of CaCO3

4. Reduce salinity significantly

Q-65.

The given X-ray spectrum is wrong

X-Ray Spectrum Is Wrong

The given X-ray spectrum is wrong

The given X-ray spectrum is wrong, because

1. Intensity is not a function of wavelength.

2. Positions of Kα and Kβ should be reversed.

3. Heights of Kα and Kβ should be reversed.

4. Both positions and heights of Kα and Kβ

View Answer with Explanation

Q-66. Biogeographically, volcanic vent communities are located

1. in mid-ocean rides

2. within subduction zones

3. In the heal depths

4. around submarine hydrothermal springs.

View Answer with Explanation

Q-67. Unlike tropical cyclones, which generally weaken on experiencing landfall, monsoon weaken on experiencing landfall, monsoon depressions that from over the Head Bay of Bengal do not weaken on experiencing landfall for the following reason

1. Lower frictional force.

2. Humid conditions over land.

3. Lower sea surface temperature.

4. More overcast cloud condition.

Q-68. With reference to the development of convective clouds with large vertical extent, the clouds with large vertical extent, the clouds with large vertical extent, the clouds need to have

1. High liquid water content.

2. Low liquid water content.

3. Low vertical updraft velocity.

4. High vertical updraft velocity.

View Answer with Explanation

Q-69. The process associated with the upward displacement of a saturated air parcel in terms of its equivalent potential temperature is

1. Saturated adiabatic process

2. Dry adiabatic process

3. Pseudo adiabatic process

4. Isothermal process

Q-70. Consider two planets A and b with radii 2r and r, respectively. Let their distances from the sun be d and 2d, respectively. Let their distance from the Sun be d and 2d, respectively. The solar constants for A(FSA) and B(FSB) are related by

1. FSA=14FSB

2. FSA=FSB

3. FSA=4FSB

4. FSA=2FSB

View Answer with Explanation

Part “C”

Q-71. If the average density of rocks in the crust is 2750kgm3 and the value of ‘g’ (acceleration due to gravity) is 10ms2 , then what is the value of litho static stress at a depth of 35km in the crust?

1. 962.5MPa

2. 96.25MPa

3. 9.625MPa

4. 9625.0MPa

Q-72. Following four figures show map views of transform faults. Which two of the four figures show the contact sense of relative movement?

Four figures show the contact sense of relative movement

Sense of Relative Movement

Four figures show the contact sense of relative movement

1. A and D

2. A and C

3. B and C

4. B and D

Q-73. Following figures, 1, 2, 3 and 4 show cross-sectional views of the folded beds. Which one of these is these is an overturned limb of the fold?

Following figures, 1, 2, 3 and 4 show cross-sectional views of the folded beds

Cross-Sectional Views of the Folded Beds

Following figures, 1, 2, 3 and 4 show cross-sectional views of the folded beds

Q-74. Literate from a particular region shows predominance of gibbsite, Fe2O3 . The region is geographically in the:

1. Equatorial zone

2. Tropical zone

3. Temperate zone

4. Polar zone

Q-75.

The given silicate structure comprising of a chain of tetrahedral

A Chain of Tetrahedral

The given silicate structure comprising of a chain of tetrahedral

In the given silicate structure comprising of a chain of SiO4 tetrahedral, the of bridging to non-bridging oxygen atoms is:

1. 1:3

2. 1:5

3. 1:2

4. 3:7

Q-76.

A hydrocarbon bearing sedimentary formation (A) revealed response as shown in (B).

A Hydrocarbon Bearing Sedimentary Formation

A hydrocarbon bearing sedimentary formation (A) revealed response as shown in (B).

Resistivity log of a hydrocarbon bearing sedimentary formation (A) revealed response as shown in (B). The spikes in the curve B are correlated with the occurrence of:

1. I-Fresh water, II- Saline water, III- Gas, IV- Oil

1. I-Gas, II- Fresh water, III- Oil, IV- Saline water

1. I-Gas, II- Oil, III- Fresh water, IV- Saline water

1. I-Gas, II- Oil, III- Fresh water, IV- Saline water

View Answer with Explanation

Q-77. Choose the correct option based on the following two statements:

(A) Fractional crystallization of feldspar in felsic magma leads to depletion of Eu in the melt.

(B) Eu in 2+ state is a compatible element in plagioclase in the plagioclase-felsic melt system.

1. Both A and B are correct

2. A is correct but B is incorrect

3. Both A and B are incorrect

4. A is incorrect but B is correct

Q-78. Choose the correct option based on the following two statements:

(A) In a mineral that does not contain Rb, the 87Sr/86Sr ration does not change with time.

(B) In a mineral that does not contain Sr, the 87Rb/85Rb ration does not change with time.

1. A is correct but B is incorrect

2. Both A and B are correct

3. Both A and B are incorrect

4. A is incorrect but B is correct

Q-79. Choose the INCORRECT statement based on the figure showing the P-T path (SPTF) for a body of rock undergoing metamorphism along a seduction zone.

The P-T path (SPTF) for a body of rock undergoing metamorphism along a seduction zone

The P-T Path (SPTF) for a Body of Rock

The P-T path (SPTF) for a body of rock undergoing metamorphism along a seduction zone

1. SPT depicts prograde metamorphic path

2. The highest grade mineral assemblage will be produced at P

3. TF depicts retrograde metamorphic path

4. The highest grade mineral assemblage will be produced at T

Q-80. Which one of the following mineral assemblages, found in mantle nodules, represent the greatest depth of derivation?

1. Plagioclase + Clinopyroxene

2. Clinopyroxene + Olivine

3. Olivine + Spinal

4. Olivine + Garnet

Q-81.

The above stereogram represents which one of the following point groups

The Above Stereogram Represents

The above stereogram represents which one of the following point groups

The above stereogram represents which one of the following point groups?

1. 6mm

2. 3mm

3. 62m2m

2. 3mm

4. 32m2m

View Answer with Explanation

Q-82. A blue-coloured calcite spar grain from a stained carbonate rock is analyzed for Mg,Sr and Fe. It is founds to be low in Mg and Sr, and high in Fe. It is interpreted as a product of

1. Deep burial diagenesis

2. Vadose diagenesis

3. Deep phreatic diagenesis

4. Sea floor diagenesis

View Answer with Explanation

Q-83.

A field geologist observes cross-section of a sandstone-shale

Cross-Section of a Sandstone-Shale

A field geologist observes cross-section of a sandstone-shale

A field geologist observes cross-section of a sandstone-shale sequence while looking at an outcrop as a deposit of

1. A uniform flow

2. A non-uniform flow

3. An unsteady flow

4. A steady flow

View Answer with Explanation

Q-84. The right sequence of sulfide ore minerals according to their increasing order of reflectance is

1. Galena, pyrite, sphalerite, pyrrhotite

2. Sphalerite, galena, pyrrhotite, pyrite

3. Sphalerite, pyrrhotite, galena, pyrite

4. Sphalerite, pyrrhotite, galena, pyrite

Q- 85.

A cubic mineral ‘MX’ has the unit cell dimension of a=5 . Which of the following for its unit cell is true if

Mass of 1M=4×1023g.

Mass of 1X=6×1023g.

Density of MX=3.2g/cm3

1. Primitive

2. c-centered

3. face-centered

4. body-centered

View Answer with Explanation

Q-86.

Correct match of items
Correct match of items

Systems Tract

Lower and upper boundary

A

Low stand Systems Tract

Transgressive sur-face, Unconformity

B

Transgressive Systems Tract

Transgressive Surface, Maximum flooding surface

C

High stand Systems Tract

Maximum flooding surface, Transgressive surface

D

Falling Stage Systems Tract

Unconformity, Transgressive surface.

The table lists ‘Systems tracts and their lower and upper boundaries. The correct pairing is

1. A

2. B

3. C

4. D

View Answer with Explanation

Q-87. VI and VS are the velocities of the P and S waves in the mantle, respectively. Vp' and Vs' are the average of PKP and SKS phases along their paths of travel, respectively, then which of the following is correct?

1. Vp'>Vp;Vs'>Vs

2. Vp'>Vp;Vs'<Vs

3. Vp'<Vp;Vs'<Vs

4. Vp'<Vp;Vs'>Vs

View Answer with Explanation

Q-88. A 2.0km thick sedimentary formation, in which the seismic wave velocity (km/sec) increases with depth( Zinkm) according to the relation 2.5+0.6Z , overlies a formation of constant velocity 5.0km/sec. consider the following statements:

Statement I: The seismic wave emerging at an angle of 30° from the shot point is critically refracted at the interface.

Statement II: The seismic wave emerging at an angle of 40° from the shot is totally reflected back at the interface.

1. Statements I and II are true.

2. Statements I is true; II is false.

3. Statements I is false; and II is true

4. Statements I and II are false.

View Answer with Explanation

Q-89. Gravity anomalies collected at the corners of a square grid of 20 m on the ground surface

Covering extensively a massive ore deposit of 3.9gmcc surrounded by the country rock of density 2.6gmcc added up to 22 milligrams. The mass of the ore body (in104tons) is

1. less than 2.1

2. close to 4.1

3. close to but less than 6.3

4. Greater than 6.3

View Answer with Explanation

Q-90. The gravity anomaly over a vertical rod(extending down to infinity) buried at a depth of 100m is 20mGaL. If the rod is buried at a depth of 50m, the gravity anomaly would be

1. 15mGaL

2. 10mGaL

3. 40mGaL

4. 80mGaL

View Answer with Explanation

Q-91. Two rock unit A and B of identical physical and chemical properties are inductively magnetized in the Earth’s magnetic field at the magnetic latitudes 30° and 60° respectively. If( IAandθB ) and ( IBandθB ) are intensities and dips of their induced magnetism,respectively,then

1. IB=2IA; tanθB=2tanθA

2. 2IB=3IA; 2tanθB=3tanθA

3. 7IB=5IA; 2tanθB=3tanθA

4. 7IB=13IA; tanθB=3tanθA

View Answer with Explanation

Q-92. F1(ω) and F2(ω) are the Fourier Transforms of the magnetic anomalies T2(x) is obtained by upward continuation of T1(x) to a height of h. Then F1(ω) and F2(ω) are related by

1. F2(ω)=exp(ωh)F2(ω)

2. F2(ω)=exp(jωh)F2(ω)

3. F2(ω)=exp(+ωh)F2(ω)

4. F2(ω)=exp(+jωh)F2(ω)

View Answer with Explanation

Q-93. Consider the two time sequences with the elements

a=1,2,3,1,2

b=1,3,5,7

What are the first two elements of their convolution?

1. 5,1

2. 2,4

3. 1,5

4. 3,6

View Answer with Explanation

Q-94. The transmitter of a time – domain EM system is in the form of a circular loop. If the radius of loop is doubled and the current is reduced by half, the dipole moment of the system will

1. Decrease to half its original value

2. Decrease to one-fourth its original value

3. Decrease by a factor of two

4. Decrease by a factor of four

View Answer with Explanation

Q-95. In a borehole, the formation fluids at a depth of 2500m have a density of 1.09gmcm2 . Then the overpressure at that depth is

1. 350kgcm2

2. 77.5kgcm2

3. 272.5kgcm2

4. 622.5kgcm2

View Answer with Explanation

Q-96. The voltage output of an ideal induction coil of 1m2 area and 50000 turns with a sinusoidal excitation of 1gamma peak to peak amplitude at 10Hz?

1. 31.4μV

2. 3.14μV

3. 0.314μV

4. 0.0314μV

View Answer with Explanation

Q-97. A function satisfies the differential equation dydx=1+xy with y(0)=1. The Taylor’s series expansion of y(x) in the vicinity x=0is.

1. 1+x+x22+x36+x424+x5120+

2. 1+x+x22+x33+x44+x55+

3. 1+x+x22+x33+x48+x515+

4. 1+x2+x23+x36+x415+x532+

View Answer with Explanation

Q-98 The Following table shows the values of a function y=f(x) for selected values of x.

The value of, dydx at x=4 is

x01234y7211035

1. 25

2. 35

3.39

4.46

View Answer with Explanation

Q-99. If the Earth were a Visco-elastic medium, which one of the following would best represent the stress (σ) and strain () relation, where A and B are positive coefficient?

1. σ=A+B

2. σ=A+Bτ

3. σ=A+BZ

4. σ=A+BZ

View Answer with Explanation

Q-100. Two high grade uranium deposits A and B are located in a province at different locations. Deposit A is exposed and B is at a depth of 10 meters. The size of B is ten times that of A. In this scenario, the radiometric anomaly of

1. B is much large then that of A

2. A is significant and that of B zero

3. Both A and B are zero

4. A and B are equal

View Answer with Explanation

Q-101. The following table shows the values of resistance R measured spacings a, at a location covered by clay.

a(m)510152025R(ohms)1.00.80.60.40.2

Which of the following conclusions can be made?

1. Clay extends to a depth of at least 25m

2. Clay is underlain by a thick basement of high resistivity

3. Clay underlain by water bearing sands overlying a thick basement

4. Clay is underlain by water bearing gravel overlying a clay formation

View Answer with Explanation

Q-102. A 30 km continental crust of density 2.5gm/cc is in isostatic equilibrium, when it overlies the mantle of density 3.5gm/cc.A10km thick oceanic crust of density 3.0gm/cc under oceans is also in isostatic equilibrium, with reference to the continental crust. The thickness of the water column in the oceans is

1. 5 km

2. 8 km

3. 10 km

4. 12 km

View Answer with Explanation

Q-103. A change in the channel pattern from meandering to braided pattern implies a sudden

1. Increase in discharge

2. Increase in sediment load

3. Decrease in channel gradient

4. Decrease in width-depth ratio

View Answer with Explanation

Q-104. Which one of the following statement about an anabranching channels is correct?

1. The islands of an anabranching river are usually in sand and gravel.

2. The individual channels of an anabranching system are highly unstable.

3. The channel gradient is very steep

4. Anabranching patterns are usually associated with lacustrine and alluvial plains or low readient fans

Q-105. Identify the two karts landforms with the following characteristics

1. This feature is formed by merging of do lines and is characterized by uneven floor.

2. Uvulas and blind valleys, respectively

3. Sinkholes and poljes, respectively

4. Uvulas and polijes, respectively

View Answer with Explanation

106. Read the following statements and identify the correct one

A. Long shore transport extends the beach in the direction of the drift, if the sediment supply is high.

B. Long shore transport extends the beach in the direction of the drift, if the sediment supply is low.

C. A beach is extended by the angle of swash if the sediment supply is high.

D. A beach is extended by the angle of swash if the sediment supply is low.

1. A and B are correct.

2. B and C are correct.

3. A and C are correct.

4. A and D are correct

View Answer with Explanation

107. The critical erosion velocity of

1. Sand is higher than silt and clay

2. silt and clay is higher than sand

3. Sand is higher than pebbles

4. Pebbles is higher than cobbles

View Answer with Explanation

108. Identify the glacial features

The glacial features

The Glacial Features

The glacial features

1. A=Esker, B=Terminal moraine, C= Kettle hole,D=Kame

2. A=Kame, B=terminal moraine, C= Kettle hole, D= Outwash plain

3. A= Esker, B=Kettle hole, C=Kame, D=Terminal moraine

4. A= Kame, B=Kettle hole, C= Outwash plain, D= Terminal moraine

View Answer with Explanation

Q-109.

The above graphs represent downstream changes in certain channel geometry or hydraulic parameters for a rive along the Y axis.

Downstream Changes in Certain

The above graphs represent downstream changes in certain channel geometry or hydraulic parameters for a rive along the Y axis.

The above graphs represent downstream changes in certain channel geometry or hydraulic parameters for a rive along the Y axis. Identify the incorrect answer

1. A = Channel gradient, B=hydraulic radius

2. A= transport competence, B=discharge

3. A= width-depth ratio, B=channel roughness

4. A= mean bed load grain size, B= channel width

View Answer with Explanation

Q-110. One of the following probable effects will not be observed under rising sea level

1. Estuaries and lagoons will widen and deepen

2. Accentuated development of Transgressive dune formation

3. Delta progradation

4. Spread of living corals or acceleration of coral growth

View Answer with Explanation

Q-111. Which one of the following statements about Normalized Difference Vegetation Index (NDVI) is incorrect?

1. NDVI is directly related to the percent of ground cover and amount of biomass.

2. Greater difference between near-infrared and red reflectance indicates less vegetation

3. NDVI values close to zero represent bare soil

4. Higher value of NDVI represent dense green vegetation

View Answer with Explanation

Q-112. Indentify the biomes

Indentify the biomes

Indentify the Biomes

Indentify the biomes

1. A= taiga, B=grassland, C= deciduous forest, F=chaparral

2. A= desert, B=taiga, D= deciduous forest, F= equatorial forest

3. A= polar, B= grassland, D=desert, E=taiga

4. A= tundra, B= taiga, D=grassland, E=deciduous forest

View Answer with Explanation

Q-113. Read the following statement and identify the corresponding soil forming processes

I. It is the process of removal of constituents in suspension or solution by percolating water from upper to lower layers.

II. It is the process of deposition of soil material in the lower layers

1. Humification and IIIuviation, respectively

2. IIIuviation and Eluviations, respectively

3. Eluviations and IIIuviation, respectively

4. IIIuviation and Horizonation, respectively

View Answer with Explanation

Q-114. If the tile of the Earth’s axis is zero degree and all the landmass is confined only to the eastern hemisphere then the isotherms will

1. Be perfectly straight and parallel to the latitudes.

2. Shift slightly towards the poles in the eastern hemisphere

3. Shift slightly towards the equator in the eastern hemisphere.

4. Shift towards the poles in the western hemisphere.

View Answer with Explanation

Q-115. Hydraulic gradient beneath A and B during rainy and dry seasons will

Hydraulic gradient beneath A and B during rainy and dry

a and B During Rainy and Dry

Hydraulic gradient beneath A and B during rainy and dry

1. Not vary

2. Be lower during rainy season than dry season

3. Be higher during rainy season than dry season

4. Change only if rainfall occurs down slope of B

View Answer with Explanation

Q-116. Weathering of granite leads to formation of solid residual minerals and release of some element as dissolved ions. The elements released are:

1. Si and Al

2. Na and K

3. Fe and Mn

4. Si, Al and Fe

View Answer with Explanation

Q-117. Presence of minerals such as pyrite and uraninite as detrital minerals in sedimentary rocks suggests that at the time of deposition

1. Chemical weathering was not active

2. Provenance weathered at a fast rate

3. Atmosphere had about 1% CO2

4. Atmosphere had negligible O2 .

View Answer with Explanation

Q-118. Given similar climatic conditions, the rate of weathering of granite is highest when:

1. Covered by sand

2. Covered by gravel

3. Not covered

4. Covered by soil and organic matter

View Answer with Explanation

Q-119. Let monochromatic intensity based on wavelength be denoted by lλ and that based on frequency be denoted by Iv. If v1=2V2 and Iv2=2Iv1 , the relationship between Iλ1 and Iλ1 and Iλ2 is

1. Iλ1=8Iλ2

2. Iλ1=2Iλ2

3. Iλ1=4Iλ2

4. Iλ1=18Iλ2

View Answer with Explanation

Q-20. Let the typical radius of a cloud droplet be 10 μm and that of a rain droplet be 1 mm. Then, the number of cloud droplets that need to coalesce to form one rain droplet is:

1. 10

2. 102

3. 104

4. 106

View Answer with Explanation

Q-121. In solving a linear one-dimensional advection equation, assume that one employs finite difference method using Leap frog time integration scheme and central differences for the space derivatives. Let c be the phase speed, ΔxandΔt be the grid size and time step, respectively, in the above scheme. For this scheme to be numerically stable, the following condition needs to be satisfied

1. cΔtΔx12

2.cΔtΔx>1

3. cΔtΔx1

4. cΔtΔx>12

View Answer with Explanation

Q-122. Retrieval of temperature profile of the atmosphere using satellite radiance measurement is considered a difficult task. Which of the following statements related to the difficulty of temperature retrieval is false ?

1. Temperature retrieval is an inverse problem.

2. The associated weighting function is broad in nature.

3. Surface contribution term is present in the radiative transfer equation.

4. There is no one-to-one correspondence between the satellite radiance measure-ments at different wavelengths and the different vertical regions of the atmosphere.

View Answer with Explanation

Q-123. Over the Indian seas, Low pressure systems do not intensity to cyclonic storms during the South-west monsoon for the following reason:

1. Ocean surface no longer serves as energy source for the cyclone

2. The existence of strong north-south pressure gradients

3. The strong onshore flow to the Indian sub-continent and its associated cloudiness

4. The presence of strong vertical wind shear of the horizontal wind

View Answer with Explanation

Q-124. Consider the following atmospheric temperature profile of a rising moist air parcel with Γ denoting the lapse rate. The lifting condensation level is at

Consider the following atmosphericb temperature profile of a rising moist air parcel with denoting the lapse rate

Atmosphericb Temperature Profile

Consider the following atmosphericb temperature profile of a rising moist air parcel with denoting the lapse rate

1. 6 km

2. 2 km

3. 4 km

4. 8 km

View Answer with Explanation

Q-125. The scattering efficiency of a particle in the Rayleigh regime for radiation of wavelength λ1 is 16 times that for wavelength of λ2. The relationship between λ1 and λ2 is:

1. λ1=4λ2

2.λ1=14λ2

3. λ1=8λ2

4. λ1=16λ2

View Answer with Explanation

126. The presence of clouds in the Earth’s atmosphere results in

1. Warming of the surface

2. Cooling of the surface

3. Warming or cooling of the surface depending on the altitude at which the cloud is present.

4. Warming or cooling of the surface depending on the optical thickness of the cloud and the altitude at which it is present.

View Answer with Explanation

Q-127. Consider two planets ‘A’ and ‘B’ with the following characteristics. The relationship between T1andT2is

‘A’ and ‘B’ with characteristics.
Consider two planets ‘A’ and ‘B’ with the following characteristics.

Distance from the Sun

Radius of the planet

Incident Solar flux density

Equivalent temperature

Planet A

d1

r1

F1

T1

Planet B

d2=4d1

r2=2r1

F2

T1

1. T1=2T1

2.T1=2T2

3. T1=4T1

4. T2=4T1

View Answer with Explanation

Q-128. Venus is closer to the Sun than Earth, and therefore solar energy incident on Venus is higher than that on Earth However, the effective radiating temperature of Venus is lower than that of the Earth, because

1. The albedo of Venus is much lower than that of Earth

2. The atmosphere of Venus has negligible CO2

3. The atmosphere of Venus has negligible N2

4. The albedo of Venus is much higher than that of Earth

View Answer with Explanation

Q-129. For the following flowing flows in the atmosphere and oceans, the flow for which Earth’s rotation is least important is :

1. A tropical cyclone centered over Head Bay of Bengal (20°N) with horizontal wind speed of 50ms1 and horizontal length scale of 400km

2. Gulf Stream off the East coast of USA (30°N) having a horizontal ocean current of 0.5ms1 and width of the Gulf Stream being 100km

3. Sea breeze circulation experienced over Pune (~19°N) having a horizontal length scale of 200km and a horizontal wind speed of 5ms1

4. A tornado over Bangladesh (25°N) with wind speed of 100ms1 and horizontal length scale of 100m

View Answer with Explanation

Q-130. Which of the following statements is true in the context of climate change?

1. Increase in nitrous oxide released from the oceans causes positive radiative forcing

2. Methane is an important gas causing negative radiative forcing on the global climate

3. Troposphere ozone content is declining in recent decades

4. Volcanic eruptions cause increase in summer temperatures due to increase in aerosols in the atmosphere

View Answer with Explanation

Q-131. Consider the region within the radius of maximum wind associated with a tropical cyclone over the Bay of Bengal. Which one of the following statements is true?

1. Shear vorticity contributes positive relative vorticity contributes positive relative vorticity while curvature vorticity contributes negative relative vorticity

2. Shear vorticity contributes negative relative vorticity while curvature vorticity contributes positive relative vorticity

3. Both shear and curvature vorticity contribute positive curvature vorticity.

4. Both shear and curvature vorticity contribute negative relative vorticity.

View Answer with Explanation

Q-132. The Brunt Vaisala frequency is 100s1 of an air parcel that oscillates about a reference level in a stable atmosphere. For a vertical displacement of 1 m in such an atmosphere, the variation of logarithm of potential temperature is:

1. 103

2. 105

3. 102

4. 104

View Answer with Explanation

Q-133. The actual wind blows at 30° to the right of geostrophic wind. Given that the magnitude of geostrophic wind is 10ms1 and density of air is 1kgm3 , the acceleration of the above flow given that the Coriolis parameter is 104S1 is:

1. 12×103ms2

2. 2×103ms2

3. 2×103ms2

4. 12×103ms2

View Answer with Explanation

Q-134. Consider the upward displacement of a saturated parcel undergoing saturated adiabatic process. Let γsandγdry be the saturated adiabatic lapse rate and dry adiabatic lapse rate, respectively. If Lv is the latent heat of condensation and Cp is the specific heat at constant pressure, the expression for the vertical variation of saturation water vapour mixing ratio is:

1. (γdryγs)CpLv

2.(γdryγs)Lvcp

3. (γdryγs)cpLv

4. (γdryγs)Lvcp

View Answer with Explanation

Q-135. The high surface salinity in the subtropical oceans is due to

1. Reduced precipitation under the warm and dry air mass

2. Increased evaporation under the cold and dry air mass

3. Advection of high salinity water mass from tropical region

4. Advection of high salinity water mass from sub-polar region

View Answer with Explanation

Q-136. Which of the following processes does not happen during an EI Nino event?

1. High sea level in the eastern equatorial Pacific compared to west

2. Shallow thermo cline in the eastern equatorial Pacific compared to west

3. Relaxation of the easterly trade winds in the equatorial Pacific

4. Eastward propagation of equatorial Kelvin wave

View Answer with Explanation

Q-137. Which one of the following currents carries low salinity waters northward?

1. East India Coastal Current during summer

2. East India Coastal Current during winter

3. West India Coastal Current during summer

4. West India Coastal Current during winter

View Answer with Explanation

Q-138. Oceanic subtropical gyres are driven by

1. Equatorial easterly and subtropical westerly winds

2. Equatorial westerly and subtropical easterly winds

3. Subtropical westerly and polar easterly winds

4. Subtropical easterly and polar westerly winds

View Answer with Explanation

Q-139. δ18O record obtained from surface dwelling plank tic foraminifera for the Holocene interval from a sediment core from northern Bay of Bengal would mainly reflect

1. Variations in ice volume, salinity and sea surface temperature change

2. Sea Surface temperature change

3. Sea surface salinity changes

4. Ice volume changes

View Answer with Explanation

Q-140. Marine sedimentary and ice core record reveals that the Earth has undergone several phases of glacial/interglacial intervals in geological past. Which of the following statement is not true In the context?

1. The present interglacial period, Holocene, is marked by several cooling periods with known cyclicity

2. In the late Quaternary the glacial/interglacial cyclicity changed from 41,000 years (obliquity) to 100000 years (eccentricity)

3. In the late Quaternary the glacial/interglacial were very long as compared to interglacial

4. Glacial/interglacial intervals have always been of equal duration and have the same periodicity in all geological time intervals

View Answer with Explanation

Q-141. Which of the following statement is correct with regard to upwelling in the oceans?

1. In the equatorial regions there is no upwelling because the Coriolis Effect is zero at equator

2. Upwelling occurs in all the coastal areas of the world oceans

3. Upwelling intensity is maximum at the Peruvian margin in Pacific during EI-Nino events.

4. Upwelling occurs in the equatorial regions due to equatorial divergence.

View Answer with Explanation

Q-142. Which one of the following sequences of paleoclimatic events is correct (from old to young) during the Quaternary?

1. Allerod-Bolling- Younger Dryas-LGM-Bond events

2. LGM-Allerod-Bolling-Younger Dryas-LGM-Bond events

3. Bond events-Younger Dryas-Allerod-Bolling-LGM

4. LGM-Younger Dryas – Bond events-Allerod –Bolling

View Answer with Explanation

Q-143. In which of the following groups of plants, the chlorophyll a: chlorophyll b ratio is approximately 3:1?

1. Green algae and Dinoflagellates

2. Blue Green algae and Dinoflagellates

3. Dinoflagellates and Cocolithophore

4. Flowering plants and Green algae

View Answer with Explanation

Q-144. What is the minimum percent of incident light of photo synthetically active radiation required for photosynthesis in the marine phobic zone?

1. 30

2. 10

3. 1

4. 90

View Answer with Explanation

Q:-147. The natural red ox rank sequence of sedimentary digenesis of organic matter involving (a) iron reduction, (b) manganese reduction, (c) sulfate reduction, (d) NO2 and (e) Methane fermentation is

1. (d)>(a)>(e)>(b)>(c)

2. (d)>(b)>(a)>(c)>(e)

3. (b)>(d)>(a)>(c)>(e)

4. (b)>(c)>(a)>(d)>(e)

View Answer with Explanation

Q:-148. Average deep ocean water where [CO23] = 90μM,[HCO3]=2350μM and [H2CO3]+[CO2(aq)]=45μM , what is the carbonate alkalinity (meqL)andCO2(mM), respectively?

1. 2.17 and 2.26

2. 2.26 and 2.17

3. 2.44 and 2.53

4.2.53 and 2.44

View Answer with Explanation

Q:-149. Divide the element N, P, Si, Cd, Zn, Pb, Al into three groups based on similarity of occurrence in the oceanic water in the oceanic water column.

1. (i)N,P,Si;(ii)Cd,Zn;(iii)Al,Pb

2. (i)N,P,Cd;(ii)Si,Zn;(iii)Al,Pb

3. (i)N,P,Si,,Cd,Zn;(ii)Al;(iii)Pb

4. (i)N,Al,Pb;(ii)Zn,Cd;(iii)Si

Q:-150. The water masses encountered in the Arabian Sea are listed ‘A’ and the depth ranges in metres listed under ‘B’ Match the items in List ‘A’ with that of ‘B’ and identify the correct set from below

List ‘A’ with that of ‘B’ and identify the correct
List ‘A’ with that of ‘B’ and identify the correct

A

B

(a)

Persian Gulf Water mass

(e) 50-100

(b)

Arabian sea high salinity Water mass

(f) 200-400

(c)

Antarctic Intermediate water mass

(g )600-800

(d)

Red Sea water mass

(h) 1000-1200

1. a-g; b-e; c-h; d-f

2. a-e; b-f; c-g; d-h

3. a-h; b-g; c-f; d-e

4. a-f; b-e; c-h; d-g