CSIR Earth Sciences June 2013 Paper

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Q:-1. What is the angle between the minute and hour hand of a clock at 7:35?

1. 0°

2. 17.5°

3. 19.5°

4. 20°

View Answer with Explanation

Q:-2. A stream of ants goes from point A to point B and return to A along the same path. All the ants move at a constant speed and from any given point 2 ants pass per second one way. It takes 1 minute for an ant to go from A to B. How many returning ants will an ant meet in its Journey from A to B?

1. 120

2. 60

3. 240

4. 180

View Answer with Explanation

Q:-3.

The capacity of the conical vessel shown

The Capacity of the Conical Vessel Shown

The capacity of the conical vessel shown

The capacity of the conical vessel shown above is V. It is filled with water up to half its height. The volume of water in the vessel is

1. v2

2. v4

3. v8

4. v16

View Answer with Explanation

Q:-4. A large tank filled with water is to be emptied by removing half of the water present in it every day. After how many days will there be closest to 100% water lest in the tank?

1. One

2. Two

3. Three

4. Four

View Answer with Explanation

Q:-5. N is a natural number. If n5 is odd, which of the following is following is true?

(A). n is odd

(B). n3 is odd

(C) n4 Is even

1. A only

2. B only

3. C only

4. A and B only

View Answer with Explanation

Q:-6. Suppose you expand the product (x1+y1)(x2+y2)(x20+y20). how many terms will have only one x and rest y’s?

1. 1

2. 5

3. 10

4. 20

View Answer with Explanation

Q:-7. A 16.2m long wooden log has a uniform diameter of 2 m. To what length the log

Should be cut to obtain a piece of 22m3 volume?

1. 3.5m

2. 7.0m

3. 140.0m

4. 22.0m

View Answer with Explanation

Q:-8. What is the last digit of 773 ?

1. 7

2. 9

3. 3

4. 1

View Answer with Explanation

Q:-9. A lucky man finds 6 pots of gold coins. He counts the coins in the first four pots to be 60, 30, 20 and 15, respectively. If there is a definite progression, what would be the number of coins in the next two pots?

1. 10 and 5

2. 4 and 2

3. 15 and 15

4. 12 and 10

View Answer with Explanation

Q:-10. A bee leaves its hive in the morning and after flying for 30 minute due south reaches a garden and spends 5 minutes collecting honey. Then it flies for 40 minutes due west and collects honey in another garden for 10 minutes. Then it returns to the hive taking the bee away from its hive? (Assume that the bee flies at constant speed)

1. 85 min

2.155min

3. 135n

4. Less than 1 hour

View Answer with Explanation

Q:-11. Find the missing number:

Find the missing number

Find the Missing Number

Find the missing number

1. 1

2. 0

3. 2

4. 3

View Answer with Explanation

Q:-12. In solving a quadratic equation of the from x2+ax+b=0 , one student took the wrong value of a and got the roots as 6 and 2; while another student took wrong value o f b and got the roots as 6 and 1. What are the correct values of a and respectively?

1. 7 and 12

2. and 4

3. -7 and 12

4. 8 And 12

View Answer with Explanation

Q:-13. The distance between two oil rigs is 6km. What will be the distance between these rigs in maps of 1:50000 and 1:5000 scales, respectively?

1. 12m and 1.2cm

2. cm and 12cm

3. 120cm and 12cm

4. 12cm and 120cm

View Answer with Explanation

Q:-14. A bird perched at the top of a 12m high tree sees a centipede moving towards the base of the tree from a distance equal to twice the height of the tree. The bird flies along a straight line to catch the centipede. If both move at the same speed, at what distance from the base of the base of the tree will the centipede be picked up by the bird?

1. 16m

2. 9m

3. 12m

4. 24m

View Answer with Explanation

Q:-15. An ant goes from A to C in the figure crawling only on the lines and taking the least length of path. The number of ways in which it can do so it

A to C in the figure crawling only on the lines and taking the least length of path

A to C in the Figure Crawling

A to C in the figure crawling only on the lines and taking the least length of path

1. 2

2. 4

3. 5

4. 6

View Answer with Explanation

Q:-16. A point is chosen at random from a circulate disc shown below. What is the probability that the point lies in the sector OAB?

A point is chosen at random from a circulate disc shown below

A Point Is Chosen at Random From a Circulate Disc Shown Below

A point is chosen at random from a circulate disc shown below

  1. 2xπ

  2. xπ

  3. x2π

  4. x4μ

View Answer with Explanation

Q:-17.

A ray of light, after getting reflected twice from a hemispherical mirror of radius R

A Ray of Light, After Getting Reflected Twice

A ray of light, after getting reflected twice from a hemispherical mirror of radius R

A ray of light, after getting reflected twice from a hemispherical mirror of radius R (see the above figure), emerges parallel to the incident ray. The separation of the incident ray. The Separation of the original incident ray and the final reflected ray is

1. R

2. 2R

3. 2R

4. R3

View Answer with Explanation

Q:-18. A king ordered that a golden crown be made from him from 8kg of gold 2kg of silver. The goldsmith took away some amount of gold and replaced it by an equal amount of silver and crown when made weighed 10kg Archimedes knew that under water gold lost 1/20th of its weight, while silver lost 1/10th . When the crown was weighed under water, it was 9.25kg. how much gold was stolen by the goldsmith?

1. 0.5kg

2. 1kg

3. 2kg

4. 3kg

View Answer with Explanation

Q:-19. In the figure how many number of circle in the black space?

Part ‘B’

Q:-21. Which one of the following represents the correct sequence of events leading to the buildup of oxygen in the Earth’s atmosphere?

1. Condensation of water, appearance of life, weathering

2. Appearance of life, condensation of water, weathering

3. Condensation of water, weathering, appearance of life

4. Condensation of water, weathering, appearance of life

View Answer with Explanation

Q:-22. The isotope 14C is produced in the Earth’s atmosphere by the interaction of cosmic rays with

1. 16O Resulting in release of an particle

2. 14N Absorbing a neutron and releasing a proton

3. 10B Resulting in the addition of two α particles

4. 13C Absorbing a neutron

View Answer with Explanation

Q:-23. For the determination of Palaeomagnetic pole position, igneous rocks studied should contain minerals that are:

1. Parameter with high Curie temperature

2. Parameter with low Curie temperature

3. ferromagnetic with high Curie temperature

4. ferromagnetic with low Curie temperature

View Answer with Explanation

Q:-24. Ratio of elemental abundance of the bulk Earth is sillier to that of

1. Basaltic Achondritic

2. Chondritic

3. FeNi Meteorites

4. Moon

View Answer with Explanation

Q:-25. The schistose texture of metamorphic rocks is best describe as

1. Roughly foliated, alternating parallel bands of light and dark coloured minerals

2. Well foliated, consisting dominantly of mica minerals large enough to be recognized

3. Foliated, but with fine-grained mineral

4. Non-foliated, interlocked minerals.

View Answer with Explanation

Q:-26. The space lattice structure of minerals is determined using

1. Chemical analysis

2. Spectroscopic method

3. X-ray diffraction

4. Scanning electron microscopy

View Answer with Explanation

Q:-27. All ocean floors are made up of rock no order than 200 million years, because

1. Ocean floors did not exist prior to this time

2. Older ocean floor is covered by lavas of younger ages

3. Older ocean floor is consumed by subduction

4. Older ocean floor is metamorphosed to Ophiolite

View Answer with Explanation

Q:-28. Which one of the following planets spine differently relative to the others?

1. Earth

2. Jupiter

3. Mars

4. Venus

View Answer with Explanation

Q:-29. A scientist measures the Moho depth in Bangalore, Almora and Leh as DB,DAandDL, and observes:

1. DL>DA>DB

2. DL=DA>DB

3. DL<DA<DB

4. DL<DA=DB

View Answer with Explanation

Q:-30. The following figure shows a transform fault across a mid-oceanic ride. The foci of the fault-associated earthquakes should be distributed in the region between

The following figure shows a transform fault across a mid-oceanic ride

The Following Figure Shows a Transform Fault Across a Mid-Oceanic Ride

The following figure shows a transform fault across a mid-oceanic ride

1. B and C only

2. A and B only

3. C and D only

4. A and D

View Answer with Explanation

Q:-31. During layer-parallel contraction, two stiff layer A and B of the same viscosity with thickness 2 and 4cm , produce buckle folds in a rock. The radio their initial wavelengths, WAWB will be:

1. 1

2. 13

3. 2

4. 13

View Answer with Explanation

Q:-32. The speed of the Gulf Stream is approximately

1. 1cms1

2. 1ms1

3. 100kmhr1

4. 0.1cms1

View Answer with Explanation

Q:-33. Average rainfall on a rainy day over the plains in India is about

1. 5cm

2. 0.5cm

3. 2cm

4. 10cm

View Answer with Explanation

Q:-34. If the density of the Earth’s atmosphere is kept constant with height at the surface value, what would be its thickness?

1. 80km

2. 16km

3. 34km

4. 18km

View Answer with Explanation

Q:-35. A viewer on the Earth sees a red Sun at sunset because

1. Sunlight traverses its shortest distance through the atmosphere

2. All of the red-wavelength light is scattered out the direct beam

3. Sunlight traverses its longest distance through the atmosphere at sunset

4. Sun is actually red in color

View Answer with Explanation

Q:-36. Which of the following properties of seawater is non-conservative?

1. Temperature

2. Salinity

3. Oxygen isotopic composition

4. Dissolved organic carbon

View Answer with Explanation

Q:-37. The lapses rate in the troposphere and the mesosphere are

1. Both negative

2. Positive and negative respectively

3. Negative and positive respectively

4. Both positive

View Answer with Explanation

Q:-38. Global warming is mainly due to the absorption of

1. Solar radiation by CO2

2. UV radiation in the stratosphere

3. Terrestrial radiation by troposphere gases

View Answer with Explanation

Q:-39. During the solstices,

1. Noon rays of the Sun fall vertically over the equator

2. Noon rays of the Sun fall vertically only over the Tropic of Cancer.

3. Noon rays of the Sun fall vertically either over 231°2S latitude.

4. Days are longer and nights are shorter in the northern hemisphere.

View Answer with Explanation

Q:-40. Cold eastern boundary current in the ocean desiccate the overlaying atmosphere and cause desert in the mid-latitude on adjoining continents. Which of the following currents is responsible for the Namib Desert?

1. Peruvian current

2. W. Australian current

3. Benguela current

4. Agulhaus current

View Answer with Explanation

Q:-41

The figure above represents the circulation of

The Figure Above Represents the Circulation Of

The figure above represents the circulation of

The figure above represents the circulation of

1. A cyclone in the southern hemisphere

2. A cyclone in the northern hemisphere

3. An anticyclone in the southern hemisphere

4. An anticyclone in the northern hemisphere

View Answer with Explanation

Q:-42.

In the figure above, Q and R are water table in dry and wet seasons.

In the Figure Above, Q and R Are Water Table in Dry and Wet Seasons.

In the figure above, Q and R are water table in dry and wet seasons.

In the figure above, Q and R are water table in dry and wet seasons. Which of the three wells (A; B; C) is expected to have water throughout the year?

1. C only

2. B only

3. A only

4. A and B

View Answer with Explanation

Q:-43. Which one of the following agents of denudation operates over the widest geographical extend?

1. Glaciers

2. Winds

4. Rivers

5. Ground water

View Answer with Explanation

Q:-44. By what angle is the Earth’ rotational axis included relative to the eclipse (the orbital plane of the Earth)?

1. 231°2

2. 661°2

3. (231°2+231°2) =47°

4. (231°2231°2) =0°

View Answer with Explanation

Q:-45. The confluence of three streams A,B,C of equal width (10m) is shown below. Water depth is the same everywhere. The water velocities (v) are also shown.

The confluence of three streams A,B,C of equal width (10 m) is shown below

Confluence of Three Streams a,B,C

The confluence of three streams A,B,C of equal width (10 m) is shown below

What is the value of x in ms ?

1. 3

2. 2

3. 6

4. -2

View Answer with Explanation

Q:-46. Sr is generally present as a trace element in calcite (CaCO3) and gregoryite (Na2CO3);

However, its concentration is much higher in the former compared to the latter. This is because

1. Calcite is a low temperature mineral

2. The ionic size of Ca is smaller than of Sr

3. Sr is highly mobile in the high temperature environment where gregoryite froms

4. The ionic size and charge of Sr are similar to those of Ca

View Answer with Explanation

Q:-47. Which one of the natural processes would likely remove a large amount of carbon from our atmosphere permanently?

1. Increase biological productivity

2. Lowering of the temperature of surface oceans

3. Large scale precipitation of carbonates

4. Enhanced physical weathering of rocks

View Answer with Explanation

Q:-48. What makes inner planets (Mercury, Venus, Earth and Mars) very different from the giant outer planets (Jupiter, Saturn, Uranus and Neptune) of our solar system?

1. They possess nitrogen dominated atmospheres

2. They do not possess ring

3. They are predominantly made up of silicates and metals

4. All the water present in them is in liquid from

View Answer with Explanation

Q:-49. The disappearance of dinosaurs marks the end of which geologic Era?

1. Precambrian

2. Cambrian

3. Cenozoic

4. Mesozoic

View Answer with Explanation

Q:-50. Charcoal and graphite both have the same composition, Yet Charcoal burns, but graphite does not, since

1. Charcoal has a porous structure

2. Graphite has high lubrication property

3. Graphite has low packing density

4. Charcoal has a high calorific value

View Answer with Explanation

Q:-51. If X-ray diffractograms of KCL(K+=1.33A°) and NaCL(Na'=0.99A°) crystals are recorded, which of the following statement is correct?

NaCl And KCl show similar‘d’ spacing value

KCL Shows higher ‘d’ spacing than that of NaCl

KCl shows a lower ‘d’ spacing values than NaCl

KCl shows more number of X-ray peaks than NaCl

View Answer with Explanation

Q:-52. Which one of the following may not control the base level changes of rivers?

1. Sea level

2. Lowest point of the river valley

3. The surface of lakes

4. Lithology of river valley

View Answer with Explanation

Q:-53. Evaporating groundwater cause the formation of

1. Laterites

2. Alkali soils

3. Sink holes

4. Podsol

View Answer with Explanation

Q:-54. Mechanical weathering acts as a feedback process of increasing the rate of chemical weathering by

1. Increasing the surface area of the rock

2. Decreasing the surface area of the rock

3. Generating a huge pile of talus

4. Oxidizing the exposed surface

View Answer with Explanation

Q:-55. Ca2+2HCO3CaCO3+H2O+CO2 . The equilibrium of the above reaction will shift to the ring in

1. Polar region

2. Greater depth in ocean

3. Equatorial region

4. Higher altitude

View Answer with Explanation

Q:- 56. A delta may start getting eroded when

1. The rainfall in catchment increases

2. Uplift takes place in catchment region

3. Polar ice volume increase

4. Polar ice start melting

View Answer with Explanation

Q:-57. There is a larger number of coral reefs in the Arabian Sea than in the Bay of Bengal because the Arabian Sea has

1. Higher temperature

2. Higher nutrient supply

3. Less suspended load sediments

4. Higher salinity

View Answer with Explanation

Q:-58. Which of the following data was used to confirm Hess’s sea-floor spreading hypothesis?

1. Magnetic anomalies on the sea floor

2. Geometric fit of continents

3. Apparent polar wander paths

4. Different fossils on continents

View Answer with Explanation

Q:-59. All the names, western Siberia – Karroo – Parana – Deccan are related to

1. Glacial boulder beds

2. Continental flood basalts

3. Large diamond mines

4. Coal basin

View Answer with Explanation

Q:-60. In the western boundary of oceans, the Ekman current induced by surface winds transports water

1. along the wind

2. Opposite to the wind

3. 90° towards the right of the wind

4. 90° to the left of the wind

View Answer with Explanation

Q:-61. The much higher mean surface temperature of Venus (~480°C) than that of the earth (~15°C) is due to

1. Its proximity to Sun

2. Continuous bombardment of planetesimals

3. Very high CO2 in its atmosphere

4. Large convective mantle

View Answer with Explanation

Q:-62. The thermal infrared region of electromagnetic radiation has the wavelength range of

1. 0.4to0.7μm

2. 1.5to3μm

3. 8to15μm

4. 1mmto1m

View Answer with Explanation

Q:-63. Which one of the following indicates river migration?

1. Meandering

2. Unmarried flood plain

3. Braiding

4. Rapid

View Answer with Explanation

Q:-64 A large number of beach ridge and swale complexes in the coastal region indicates

1. Marine transgression

2. Heavy sediment inflow from rivers

3. Frequent change in littoral current

4. Marine regression

View Answer with Explanation

Q:-65. gA,gBandgC Are the observed gravity fields in a valley, on a plane surface and on the top of a mounting on the same latitude, respectively, then?

1. gAandgB Will be less then gC

2. gAandgC Will be less then gB

3. gBandgA Will be less then gC

4. gBandgC Will be less then gA

View Answer with Explanation

Q:-66. For surface observation made in the high frequency rang (MHz) , the electromagnetic behavior of a geological material is largely controlled by

1. Dielectric Constant

2. Magnetic permeability

3. Electrical resistivity

4. Porosity

View Answer with Explanation

Q:-67. In regions of plate convergence, the continental crust does not sub duct to a greater depth, because of its

1. Lower density

2. Higher density

3. Lower viscosity

4. Higher viscosity

View Answer with Explanation

Q:-68. Compared to the continental crust, the rocks of the upper mantel are

1. Richer in iron and have larger susceptibility value

2. Richer in iron, but have smaller susceptibility values

3. Poorer in iron and have smaller susceptibility values

4. Poorer I iron, but have higher susceptibility values

View Answer with Explanation

Q:-69. The Earth’s magnetic field at poles in twice that at the equator. If the Earth rotates twice faster than present, the ration would be

1. 2

2. 22

3. 4

4. 8

View Answer with Explanation

Q:-70. Compared to the normal crust, an isostatically undercompensated land mass has a

1. Thinner crust and undergoes upliftment

2. Thinner crust and undergoes subsidence

3. Thinker crust and undergoes upliftment

4.Thinker crust and undergoes subsidence

View Answer with Explanation

PART ‘C’

Q:-71. A body centered space group with a four-fold screw axis is abbreviated as:

1. P4

2. I4

3. P4I

4. I4I

View Answer with Explanation

B Statement I:

The X-ray powder diffraction pattern a body centered cubic crystal is found to have fewer diffraction lines than that of the primitive one.

Statement II:

1. Systematic extinction of diffraction peaks occur in body centered crystals.

2. Statement I and II are true and II explains I.

3. Statement I and II are false.

4. Statement I is false but II s true

5. Statement I and II are true, but II does explain I.

View Answer with Explanation

C. The unit cell parameter of a tetragonal crystal, namely, cell edges (a and c), number of formula units (z) and formula units(z) and formula are given. Its density can be calculated by:

1. molecularweighta×c

2. molecularweighta2×c

3. molecularweight×Za2×c

4. (molecularweighta×c)×z

View Answer with Explanation

Q:-72. A. The stereographic projection of the fold axis (F) and the axial planes (AP) in two regions, I and II, are shown below

The stereographic projection of the fold axis (F) and the axial planes (AP) in two regions

The Stereographic Projection of the Fold Axis

The stereographic projection of the fold axis (F) and the axial planes (AP) in two regions

The Folds in I and II are then:

1. I = upright, plunging fold and II = reclined fold.

2. I = inclined, plunging fold and II = horizontal fold.

3. I = recline fold and II = vertical fold.

4. I = vertical fold and II = horizontal fold.

View Answer with Explanation

B. Under a compressive tectonic stress, the faulting in rocks with coulomb friction occurs along the plane of maximum effective shear stress. If the angle of friction is 26° ,the inclination of fault to the compression direction would be:

1. 30°

2. 32°

3. 34°

4. 36°

View Answer with Explanation

C. The figure shows two differently oriented deformable beds in a ductile shear zone undergoing simple share motion. What will happen to B1andB2 with progressive shearing?

The figure shows two differently oriented deformable beds in a ductile shear zone undergoing simple share motion

The Figure Shows Two Differently Oriented Deformable Beds

The figure shows two differently oriented deformable beds in a ductile shear zone undergoing simple share motion

1. Continuous stretching of B1andB2

2. Shorting followed by extension of B1, whereas continuous extension of B2

3. Continues shorting of both B1andB2

4. Extension followed by shortening of B1 and extension B2 .

View Answer with Explanation

Q:-73.A A batch of magma on its passage to surface undergoes slow cooling, has low nucleation rate but high rate of crystal growth. Upon its eruption what would be the resultant texture?

1. Porphyritic

2. Hypidiomorphic

3. Aplitic

4. Glassy

View Answer with Explanation

B Arrange the minerals in the increasing order of entropy.

1. Microcline, Sanidine, Orthoclase

2. Orthoclase, Sanidine, Microcline

3. Sanidine, Microcline, Orthoclase

4. Microcline, Orthoclase, Sanidine

View Answer with Explanation

C. Latent heat fusion of a mineral is 4000JMol and on melting its entropy increases by 2.0Jmol1K1 What is the temperature of melting?

1. 1000K

2. 2000K

3. 3000K

4. 4000K

View Answer with Explanation

Q:-74. A A basalt contains 2%Fe2O3and10%FeO by weight. What would be the value of Fe2O3 ? (Hint: Fe3+ represent 15wt% of the total iron)

1. 12.0wt%

2. 10.0wt%

4. 13.8wt%

5. 15wt%

View Answer with Explanation

B Chemical analysis of an igneous rock yielded the following results:

OxideWt%SiO25.53TiO20.32Al2O30.49FeO23.92 OxideWt%MnO2.61MgO4.05CaO19.40Na2O0.13 OxideWt%K2O0.04P2O57.05LOI20.24

What is the name of the rock?

1. Kimberlite

2. Carbonatie

3. Anrthosite

4. Lamprophyre

View Answer with Explanation

C. A large-ion-lithophile-element (LILE) depleted mantel source is undergoing partial melting. The Chondritic-normalized rare-earth-element (REE) contents of two different magma batches (M1 and M2) are depict in the below. What percentage of melting would they likely represent?

A large-ion-lithophile-element (LILE) depleted mantel source is undergoing partial melting

Large-Ion-Lithophile-Element (LILE)

A large-ion-lithophile-element (LILE) depleted mantel source is undergoing partial melting

1. M110%andM210%

2. M1<1%andM2=100%

3. M120%andM21%

4. M11%andM220%

View Answer with Explanation

Q:-75 A In natural system the lanthanides (Rare Earth Elements) occur in +3 oxidation state. CeandEu Also occur respectively in:

1. +2 and +4

2. +4 and +2

3. +2 and +2

4. +5 and +4

View Answer with Explanation

B. An igneous rock mainly made up of cumulate plagioclase feldspars will have Chondritic normalized REE pattern with

1. Positive Ce anomaly

2. Negative Ce anomaly

3. Positive Eu anomaly

4. No Ce or Eu anomaly

View Answer with Explanation

C. FeMn nodules of hydrogenuse origin have distinct negative Ce anomaly in shale normalized REE patterns. This is dule to

(1) Ce Cannot be accommodating in minerals that are in FeMn nodules.

(2) The REE pattern of shale has strong positive Ce anomaly which results in negative Ce anomaly of shale normalized FeMn nodules.

(3) Ce Being highly mobile, it is removed from the FeMn nodules to the surrounding abyssal sediments.

(4) Ce is depleted relative to other REE in the sea water and hence the FeMn nodules also develop negative Ce anomaly.

View Answer with Explanation

Q:-76.A In the light of metamorphic facies concept state which one of the politic assemblages would be complete with the assemblage of epidotic-actinalite-chlorite for a mafic rock.

1. Lawsonite-muscovite-biotie

2. Kainite-muscovite-biotitie

3. Pyrophylite-muscovite-biotitic

4. Kyanite-granet-biotie-plagioclase

View Answer with Explanation

B. A rock contains the following minerals: muscovite (KAl2ALSi3O10(OH)2) , K Feldspar (KALSi3O8) , Sillimanite (Al2SiO5) ,Quartz (SiO2) .Deduce the components and state if the phases have univariant or divariant reaction relationship.

  1. Al2O3SiO2K2OH2O ; divariant

  2. Al2O3SiO2K2OH2O ; univariant

  3. Al2O3SiO2K2O ; univariant

  4. Al2O3K2OH2O ; divariant

View Answer with Explanation

C. if a rock of politic composition is subjected to eclogite facies of metamorphism what mineral assemblage would be developed?

(1) Stisthovite-Kyanite-Garnet

(2) Quartz-mulltie-Garnet

(3) Coesite-kyanite-Phlogopite

(4) Kyanite-Sillimanite-Pyrope

View Answer with Explanation

Q:-77. A submarine debris flow evolved into a turbidity current while moving along the continental slope. The corresponding fluid flow would then:

1. Change from turbulent to laminar

2. Change from laminar to turbulent

3. Remain unchanged

4. Oscillate between laminar and turbulent

View Answer with Explanation

B. Drilling struck oil in a buried coral reef system in the offshore Bombay Hight.Two facies namely, ‘Reef Crest’ and ‘Fore reef talus’ were identified. Choose the correct combination of facies-lithology-reservoir property from below:

1. Reef crest – Bound stone – High permeable

2. Fore reef talus – Grain stone – Low permeable

3. Reef crest – Grain stone - Low permeable

4. Fore reef talus – Bound stone – High permeable

View Answer with Explanation

C. The following figure depicts a meandering river system terminating as a delta with its sub-marine counterpart. Graphic sedimentary logs as point A, B and C are shown in the figure below.

Graphic sedimentary logs as point A, B and C are shown in the figure below.

Sedimentary Logs as Point a, B and C

Graphic sedimentary logs as point A, B and C are shown in the figure below.

Identify the correct depositional succession from the following combinations:

1. AA',BC',CB'

2. AB',BA',CC'

3. AC',BB',CA'

4. AA',BB',CC'

View Answer with Explanation

Q:-78. Planktonic foraminiferal assemblages in sediment cores are used in paleoceanographic and paleoclimatic reconstructions. Changes in diversity, abundance, coiling pattern, and morphology and preservation condition of various species are important parameters considered for interpreting the assemblage recorded.

A Identify the wrong statement

1. Species diversity decreases from warm to cold water mass conditions

2. Sinistrally coiled shell in Neogloboquadrinapachyderma predominate in cold water mass conditions

3. Nature of planktonic foraminiferal assemblage is primarily related to the bottom water mass conditions.

4. Planktonic foraminifera are poorly preserved in sediments below the carbonate lysocline.

View Answer with Explanation

B Choose the correct statement.

1. Different species of planktonic foraminifera tend to live at different depths in the water column.

2. They are more susceptible to the dissolution as compared to the pteropods.

3. They are abundant in self-area then the deep ocean sediments.

4. Their shells are aragonite in composition.

View Answer with Explanation

C. Deep sea records of low latitude regions during certain time intervals in the Quaternary contain abundant cold temperature species and sinisterly coiled Neogloboquadrinapachyderma indicating:

1. Interglacial cycles

2. Glacial cycles

3. Intensification of tropical upwelling

4. Intensification of Antarctic Bottom water formation.

View Answer with Explanation

Q:-79. Photosynthesis and silicate weathering consume CO2 , which can be shown by the following reactions.

6CO2+6H2O+LightenergyC6H12O6+6O2(1)

Ca2SiO4+2H2O+2CO22CaCO3H4SiO4(2)

A. The reason for the alkaline pH of surface water is

1. Silicate weathering produces HCO3

2. High organic matter production

3. High total dissolved salts in water

4. High suspended particulate matter in waters

View Answer with Explanation

B Reaction No. 1 sequester CO2 provided the organic matter produced is

1. Buried with the sediments

2. Decomposed in the soil

3. Recycled back to the forest ecosystem

4. Converted to food grains through agriculture

C Reaction no.2 of silicate weathering is not responsible for

View Answer with Explanation

1. Climate change in geological time scales

2. Decadal to century scale climatic changes

3. Nutrient supply to the plants

4. Acid rain buffering

View Answer with Explanation

Q:-80. A Which of the following is true for a rejuvenated topography?

1. Broad valley with huge flood plain

2. Meandering river with Oxbow lake and cut-off meanders

3. Incised river with entrenched meanders

4. Excessive braiding

View Answer with Explanation

B In a vast Pediplain country there are scanty mounds having lithological similarity with the surrounding rocks. This condition of a terrain indicates which of the following?

1. Palin country with number of intrusive plugs

2. Very young topography

3. Matured topography

4. Yet to attain maturity

View Answer with Explanation

C. A convex coast having bundles of beach ridges, swales, back water, indicates one of the following character of the coast

1. Erosion

2. Subsidence

3. Emergence

4. Dormancy

View Answer with Explanation

Q:-81. A On the day of vernal equinox, the shadow cast by a tower 56m high was 7m long, pointing towards North. The latitude of the region is

1. 10°S

2. 10°N

3. 7°S

4. 7°N

View Answer with Explanation

B Which of the following could be one of the hottest days in the year at New Zealand?

1. 25 December

2. 22 July

3. 1 December

4. 21 March

View Answer with Explanation

C. When the local time is noon on a ship, the Greenwich mean time is 14:16Hrs . The longitude of its location is

1. 34°E

2. 34°W

3. 43°E

4. 43°W

View Answer with Explanation

Q:-81. What is the ground coverage of 1000×2000 pixel dimension agricultural land in the IRSLISSIII image?

1. 1042km2

2. 1058km2

3. 1046km2

4. 1038km2

View Answer with Explanation

B. A highly undulatory terrain of different types of vegetation is imaged with an illumination from west. Which specific digital image processing technique will provide a better interpretation of all vegetation types broadly?

1. Density slicing

2. Linear stretching

3. Ratioing

4. Filtering

View Answer with Explanation

C. Assume that the relief displacement for a tower ‘A’ is 3mm and the radial distance from the center of the photo to the top of the tower is 50mm . If the flying height is 1350m above the base of the base of the tower, find the height of the tower.

1. 62m

2. 56m

3. 76m

4. 81m

View Answer with Explanation

Q:-83.

Figure shows the reconstruction global air temperature anomalies during 700AD

Global Air Temperature Anomalies

Figure shows the reconstruction global air temperature anomalies during 700AD

Figure shows the reconstruction global air temperature anomalies during 700AD

To 1900AD

A Such high resolution reconstruction are usually based on

1. Corals

2. Lake Sediments

3. Ocean sediments

4. Tree ring

View Answer with Explanation

B Identity the little Ice Age in the figure

1. A to B

2. B to C

3. C to D

4. A to C

View Answer with Explanation

C In the above figure where is the rate of change of temperature the largest?

1. Between A and X

2. Between X and B

3. Between Y and C

4. Between Z and D

View Answer with Explanation

Q:-84. A Warm Ocean current helps maintaining grasslands in the adjoining continents. Choose the correct matches from among the following grassland with the corresponding ocean currents:

Choose the correct matches
Choose the correct matches
  1. Pampas

  1. Agulhas current

  • Veld

  • East Australian current

  • Downs

  • South Atlantic current

  • Stepper

  • Gulf stream

1. (i)(a);(ii)(b);(iii)(c)

2. (i)(c);(ii)(a);(iii)(b)

3. (i)(b);(ii)(a);(iii)(c)

4. (i)(a);(ii)(b);(iii)(d)

View Answer with Explanation

B. Cold Ocean current cause desert in the adjoining contains. Choose the correct matches from among the following deserts with the corresponding ocean currents:

Choose the correct matches from among the following deserts
Choose the correct matches from among the following deserts
  1. Sahara

  1. Canaries current

  • Mohave/Mojove

  • W.Austalian current

  • Australian Desert

  • California current

  • Atacama

  • Benguela current

1. (i)(a);(ii)(c);(iii)(b)

2. (i)(c);(ii)(a);(iii)(b);(iv)(d) 1

3. (i)(c);(ii)(a);(iii)(b)

4. (i)(b);(ii)(c);(iii)(a)

View Answer with Explanation

C. Desert are mostly confined to 20° to 35° of latitudes on either side of the equator because

(1) This region receives the maximum solar radiation

(2) Atmospheric motion in the region is convergent at the ground level

(3) Soils in these regions have poor fertility

(4) Atmospheric motion is mostly sinking type of motion in these regions.

View Answer with Explanation

Q:-85.A Transverse dunes from in a region where

1. Sand is abundant and vegetation is scarce

2. Sand supply is limited and winds are unidirectional

3. Sand supply is moderate and winds are unidirectional

4. Sand supply is limited and vegetation is dense

View Answer with Explanation

B. Sedimentary structure formed in coarse sand in response to increasing stream velocity follow one of the following orders

1. Lower plane bend dunes upper plane bend Antidune

2. Ripple dune upper plane bend Antidune

3. Wave ripple dune antidune

4. Ripple lower plane bend dunes antidune

View Answer with Explanation

C. Limestone are generally formed in shallow shelf region along coastline that has

1. Warm water, rich nutrient supply and less detrital input

2. Warm water, rich in nutrients and abundant detrital input

3. Cold water, rich in nutrients and abundant detrital input

4. Cold water, rich in nutrient and less detrital input

View Answer with Explanation

Q:-86. A Identity the correct statement:

1. Artesian well are permanent source of fresh water

2. Artesian well water lack in dissolved minerals

3. Artesian wells are usually more than 300 m deep

4. Artesian wells are formed in regions where a permeable layer (e.g. sandstone) is sandwiched between two impermeable layer (e.g clay)

View Answer with Explanation

B Which one of the following regions has a high potential for artesian wells?

1. Western Ghats

2. Kaveri Delta

3. Deccan traps

4. Himalava

View Answer with Explanation

C. Which of the following has the greatest negative influence on ground water recharge?

1. Urbanization

2. Population pressure

3. Climatic change

4. Deforestation

View Answer with Explanation

Q:-87. The following figure shows an E-W cross-section of a topography with a sudden rise in elevation by 100m at a location B, and which is otherwise even everywhere.

Gravity observations were made at widely separated stations A, B, C and D and also At E in a borehole at a depth of 100m below D. The topographic material has an average density d such that s gravitational constant.

The following figure shows an E-W cross-section of a topography with a sudden rise in elevation by 100m at a location B

E-W Cross-Section of a Topography.

The following figure shows an E-W cross-section of a topography with a sudden rise in elevation by 100m at a location B

A. Compared to A, the gravimeter reading at B is

1. Same as that of A

2. Smaller by 12mgals

3. Smaller by 6mgals

4. Larger by 12mgals

View Answer with Explanation

B Compared to B, the gravimeter reading at C is smaller bt

1. 31mgals

2. 25mgals

3. 19mgals

4. 12mgals

View Answer with Explanation

C. Compared to D, the gravimeter reading at E is

1. Smaller 31mgals

2. Smaller 17mgals

3. Smaller 7mgals

4. larger 7mgals

View Answer with Explanation

Q:-88.A the rate of decrease of the magnetic field with elevation on Earth’s surface is

1. Everywhere the same

2. Maximum at the latitude 60°

3. Twice at the equator compared to the poles

4. Twice at the poles compared to the equator

View Answer with Explanation

B. magnetic anomalies in the vertical and horizontal components at the station close to the magnetic latitude 30° are found to be 150 and -173 gammas respectively. Then the anomaly in the total field would be around

1. 230gammas

2. 75gammas

3. 23gammas

4. zero

View Answer with Explanation

C. A two-dimensional body of susceptibility K striking N30°E at the magnetic latitude 30°N is magnetized by induction in the Earth’s magnetic field F . The effective intensity and inclination of the induced magnetism are respectively

1. KF,30°

2. KF/2,tan1(2/3)

3. 19/28KF,tan1(4/3)

4. 19KF7,tan1(3/4)

View Answer with Explanation

Q:-89. If (4,3,8,x,60) is a sequence of number generated by assigning progressively increasing values for the variable in a polynomial, then x=

1. 17

2. 25

3. 33

4.41

View Answer with Explanation

B. Given that the approximate solution lies at x=y=1.0, the solution of the following set of equations

2x+lny=2.1

And

lnx+2y=1.9

1. x=0.9,y=1.1

2. x=0.95,y=1.050

3. x=1.05,y=0.95

4. x=1.1,y=0.9

View Answer with Explanation

C. (1,2,6,7,8) are the partial energies of a digitized signal.

Statement I: There are as many as 32 signals that can generate these partial energies

Statement II: The auto correlate signals of each of the possible signal are identical.

1. Statements I and II are true

2. Statements I is true; II is false

3. Statements I is false; II is true

4. Statements I and II are false

View Answer with Explanation

Q:-90. A seismic wave emanating from a shot point, when incident at angle 30° at a point P on a refractor, gets refracted at an angle 60° . If the wave is incident 52m away from p, it would be critically refracted.

A. The critical angle is

1. tan1(1/3)

2. tan1(1/2)

3. tan1(3/2)

4. tan1(2/3)

View Answer with Explanation

B. The depth to the refractor is about

1. 250m

2. 330m

3. 400m

4. 467m

View Answer with Explanation

C. The cross-over distance along a refraction profile across this refractor would be around

1. 850m

2. 1540m

3. 1250m

4. 1430m

View Answer with Explanation

Q:-91. A Ideally it is not possible to derive the travel time of P wave from the corresponding knowledge for S wave despite knowing the value of Vp/Vs in the medium of propagation. This is due to difference in their

1. Attenuation property

2. Particle motion

3. Ray parameter

4. Wave propagation characteristics.

View Answer with Explanation

B Consider a 80km thick crust of Vp~6km/s overlying the mantle with p velocity 8.0km/s. If an earthquake occurs near surface, at which epicenter distance the pn will be first recorded on seismogram?

1. 280km

2. 320km

3. 390km

4. 430km

View Answer with Explanation

C Consider a viscous body of viscosity η excite by a harmonic stress σ=σ0sin(ωt). the elastic response of the system would be

σ0sin(ωt)/η

σ0ωcos(ωt)/η

σ0cos(ωt)/(ηω)

σ0ω(sin(ωt)+cos(ωt))/η

Q:-92. MT sounding were carried over a terrain. Each sounding was carried out for 100,000 second and at each second 20 stack were measured using 10 bit A/D convertor. The acquired data was sample at 2 second interval and all the 3-component of the magnetic field and 2 component of electric field were recovered. The data brings out that (i) phase data shows consistent splitting and (ii) induction vectored are negligible.

A. How many days would have been required for each observation?

(1) ~10days

(2) ~20days

(3)~30days

(4)~40days

View Answer with Explanation

B. The total memory requirement will be

(1) 4.32kbytes

(2) 8.64kbytes

(3) 4.32Mbytes

(4) 8.64Mbytes

View Answer with Explanation

C . The area is

(1) 1D isotropic

(2) 1D anisotropic

(3) 2D isotropic

(4) 2D anisotropic

View Answer with Explanation

Q:-93.The values of a repose function at frequencies f1,f2andf3 are 0,1and100 respctively.

A. The phase lag due to indicative coupling and conductor property, respectively, for the observation at f1 are

(1) 0°and0°

(2) 90°and0°

(3) 0°and90°

(4) 90°and90°

View Answer with Explanation

B. The ratio of the real and imaginary components of the response function at f3 is

(1) ~0

(2) ~0.25

(3) ~0.50

(4) ~1.0

View Answer with Explanation

C. Which of the following is true?

(1) f1 Corresponds to a poor conductor, while f2 corresponds to a moderate conductor

(2) f1 Corresponds to a good conductor, while f2 corresponds to a moderate conductor

(3) f1 Corresponds to a moderate conductor, while f2 corresponds to a good conductor

(4) f1 Corresponds to a moderate conductor, while f2 corresponds to a poor conductor

View Answer with Explanation

Q:-94.A You are to economically conduct a magnetic survey for an ore body expected to be 200m wide and 500m thick, occurring at a depth of 100m and running for about 2 Km. The optimum traverse and station spacing would be

(1) 200m,20m

(2) 500m,50m

(3) 1km,100m

(4) 1km,200m

View Answer with Explanation

B. Pick out from the following the most appropriate geophysical strategy to located diamond bearing volcanic pipes in an area where other igneous intrusive are possible

(1) Reconnaissance gravity and magnetic surveys to located areas of hight anomalies, to be followed by seismic fan shooting for the outlines of the pipes.

(2) Gravity survey to located gravity highs, followed by magnetic and resistivity surveys to identify regions of magnetic closures and resistivity high.

(3) Reconnaissance magnetic survey to identity magnetic closure, to be followed by detailed gravity and resistivity survey to identify region of gravity and resistivity lows.

(4) Reconnaissance magnetic survey to identify magnetic closure to be followed by gravity and resistivity survey to identify regions of gravity and resistivity lows.

View Answer with Explanation

C. Ground water occur in isolated gravel pocked present in a thick clay formation overlain by a moderately thick layer of alluvium. Which of the following can be an appropriate geophysical strategy in location spots for drilling wells?

(1) Systematic electrical sounding followed by GPR sounding

(2) Parallel electrical profiles followed by seismic refraction surveys

(3) Parallel electrical profiles followed by electrical sounding

(4) Electrical sounding at selection place followed by systematic electrical profiling

View Answer with Explanation

Q:-95 A Turbulence experience by aircraft at higher levels is due to the breaking of

(1) Rossby Waves

(2) Kelvin Waves

(3) Soud Waves

(4) Gravity Waves

View Answer with Explanation

B. The fog occurring over the Indian region is of the type

(1) Radiative

(2) Adjective

(3) Frontal

(4) Valley

View Answer with Explanation

C .Visibility is reduced in the fog due to the existence of

(1) Large-size cloud drops in large numbers

(2) Small-size cloud drops In large numbers

(3) Large-size cloud drops in small numbers

(4) Small-size cloud drops in small numbers

View Answer with Explanation

Q:-96. A. Convective Available potential Energy(CAPE) of the atmosphere depends on

(1) Potential energy of the atmosphere

(2) Kinetic energy of the atmosphere

(3) Buoyancy of the atmospheric parcel lifted from the surface to level of tree convection

(4) Incident solar radiation

View Answer with Explanation

B. convection Inhibition Energy (CINE) of the atmosphere is the energy required

(1) To heat the surface water up to the threshold temperature for convection to occur

(2) To raise the atmospheric parcel from surface to the level of free convection

(3) To increase the kinetic energy of the atmospheric parcel to twice its original value

(4) To cool the boundary layer air to stability to stabilization

View Answer with Explanation

C .Atmosphere response to convective heating at the equator is

(1) Kelvin wave moving eastward and Rossby wave moving westward

(2) Kelvin wave moving westward and Rossby wave moving eastward

(3) Gravity wave moving downward

(4) Mixed Rossby gravity wave moving upward

View Answer with Explanation

Q:-97. A. Rader reflectivity is measured in units of dBZ, which is

(1) Received power at the receiver of the radar in mill watts

(2) Transmitted power by the transmitter of the radar in kilowatts

(3) Radio of the received to transmitted power in the log scale

(4) Coefficient of reflection of transmitted power

View Answer with Explanation

B. melting band in the radar picture indicates the presence of

(1) Cumulonimbus clod

(2) Cirrus cloud

(3) Strati form cloud

(4) Noctilucent cloud

View Answer with Explanation

C. Convection cloud can be identified on a radar screen by observing the reflectivity which shows

(1) High reflective at lower levels

(2) Slow decrease of reflectivity above the melting level

(3) Rapid decrease of reflectivity above the melting level

(4) Constant reflectivity throughout the height of the cloud

View Answer with Explanation

Q:-98. A. Cyclostrophic flow in the nor them hemisphere

(1) Can be either a cyclonic or anti-cyclonic flow

(2) Has to be a cyclonic flow only

(3) Has to be anti-cyclonic flow only

(4) Is neither a cyclonic nor an anti-cyclonic flow

View Answer with Explanation

B. The theorem which provides the most general relationship between circulation and vorticity is the

(1) Gauss divergence theorem

(2) Bjerknes circulation thermos

(3) Stone theorem

(4) Kelvin circulation theorem

View Answer with Explanation

C. The expression for Coriolis force has both 2Ωcosϕ as well as 2Ωsinϕ terms, where Ω the angular velocity of Earth’s rotation is, and ϕ is the latitude. While the term 2Ωcosϕ is not given much importance, the term 2Ωsinϕ is calls the Coriolis parameter and is denoted by f. The reason for the importance given to 2Ωsinϕ is because

(1) 2Ωsinϕ has a physical meaning and is nothing but the planetary vorticity

(2) 2Ωsinϕ is related to the horizontal component of the angular velocity of the rotation of the Earth

(3) 2Ωsinϕ has opposite signs in the two hemispheres

(4) 2Ωsinϕ has higher magnitude over middle and higher latitudes

View Answer with Explanation

Q:-100. The temperature attained when moist air is saturated by isobaric cooling is called

A.

(1) Virtual temperature

(2) Equivalent temprature

(3) Wet bulb temperature

(4) Dew point temperature

View Answer with Explanation

B. Instability of air parcel is reduced by

(1) Radiative heating

(2) Latent heat of condensation

(3) Entrainment

(4) Vertical upward displacement

View Answer with Explanation

C.Criteria for potential instability in a moist layer where the dew point temperature rapidly decreases with height is (taking θ,θe, and respectively as potential temperature, equivalent potential temprature, and height)

(1) (θe/Z) is negative

(2) (θe/Z) is positive

(3) (θe/Z) is negative

(4) (θ/Z) is positive

View Answer with Explanation

Q:-101. A. Fair weather electric field is maintained in the atmosphere primarily due to the following reason.

(1) Existence of ionosphere

(2) Existence of Earth’s magnetic field

(3) Existence of precipitation currents which bring positive charges to the ground

(4) Presence of thunderstorms

View Answer with Explanation

B. The distribution of electric charges in a thunderstorm is as follows:

(1) Main positive charge Centre at base of the cloud and a main negative charge center at the top of the cloud

(2) Main positive charge center at the center of the cloud and a main negative charge center at the base of the cloud

(3) Main positive charge center at the top of the cloud and a main negative charge center at the base of the cloud.

(4) Main negative charge center at the center of the cloud and a main positive charge center at the base of the cloud.

View Answer with Explanation

C. The first stage of development of a lightning discharge from cloud-to-ground is the manifestation of a ‘stepped leader’. The ‘stepped leader’ is an

(1) Invisible shaft of negatively charged ions

(2) Invisible shaft of positively charged ions

(3) Visible shaft of negatively charged icon

()Visible shaft of positively charged icons

View Answer with Explanation

Q:-102. A. homogenous nucleation os water in vapour at temperature above 0°C are extremely rare in the real atmosphere since

(1) Lower availability of wet table aerosols in real atmosphere

(2) Temperature encountered in the atmosphere are not conducive for homogeneous nucleation to operate

(3) The observation supersaturation in the real atmosphere hardly exceeds 1%

(4) Lower availability of hygroscopic aerosols in the real atmosphere

View Answer with Explanation

B. The Bergeron-Findeisen process is one in which

(1) The warm cloud liquid droplets grows to raindrop size

(2) The ice crystals grow at the expense of supercoiled liquid droplets

(3) The super cooled liquid droplets grows to raindrop size

(4) The super cooled liquid drops grow at the expense of ice crystals

View Answer with Explanation

C. The cumulus cloud in a marine environment is more likely to precipitate then a cumulus cloud over the continental region. The reason for this is

(1) The marine cumulus cloud has higher verticals motion

(2) The marine cumulus cloud has larger liquid water content

(3) The number of cloud droplet in marine cumulus cumulus cloud is more than that in a continental cumulus cloud

(4) The cloud droplet size in the marine cumulus is larger than that of a continental cumulus cloud

View Answer with Explanation

Q:-103.A A southerly wind of 10ms1 is blowing over an ocean of density 1000kgm3. If the value of the drag coefficient is 1×103, then the magnitude of the wind stress will be (1) 0.1dynecm2

(2) 0.1Nm2

(3) 1Nm2

(4) 100dynecm2

View Answer with Explanation

B. With reference to A above, if there is a coastline of 729km to the lest of the wind at 30°N, the magnitude of Ekman transport will be (Sv = Sverdrup)

(1) 100Sv

(2) 10Sv

(3) 1Sv

(4) 0.1Sv

View Answer with Explanation

C. With reference to A and B above, if the wind speed become zero at a distance 100 km away from the coast, the wind stress curl would be

(1) 106Nm3

(2) 103Nm3

(3) 103Nm3

(4) 105Nm3

View Answer with Explanation

Q:-104. The are a number of marginal seas, whose evolution has influence ocean circulation and climate on a global scale. Of these, the Mediterranean Sea is important, which is connected today with the Atlantic Ocean through the strait of Gibraltar

The Mediterranean Sea Was isolated from the Atlantic Ocean following the sea level fall for a short period during the

A.

(1) Early

(2) Late Miocene

(3) Late

(4) Early Miocene

View Answer with Explanation

B. The isolated Mediterranean sea developed high salinities and voluminous amounts of evaporates and this event is popularity knows as

(1) Messinian salinity Anomaly Event

(2) Messinian Salinity Crisis Event

(3) Mediterranean Seaway Closure Event

(4) Mediterranean Evaporite Event

View Answer with Explanation

C. The amount of high salinity, warm Mediterranean outflow water entering the Atlantic Ocean has a major influence on the global climate because it will

(1) Affect the themohaline circulation of North Atlantic

(2) Release dissolved CO2 into the Atlantic

(3) Warm the Atlantic Ocean surface water

(4) Affect the Interropical convergence Zone(ITCZ)

View Answer with Explanation

Q:-105.A Iron is a trace element and present as Fe(II) & Fe(III) in seawater. In their vertical profiles at the oxygen minimum layer

(1) Fe(II)will have maxima

(2) Fe(II)will have minima

(3) Fe(III)will have maxima

(4) Both Fe(II)& Fe(III)will have maxima

View Answer with Explanation

B. Which of the following represents the predominant cation-anion pair in river water and what is their origin?

(1) (Na+&S042) and weathering of gypsum

(2) (Ca2+&Cl) and cyclic salt

(3) (Na+&NO3) and dry deposition

(4) (Ca2+&HCO3) and weathering of carbonate rocks

View Answer with Explanation

C. The rations of elements A and B in seawater and river water are 4.2×104:1and6:1 ,respectively. The ratio of residence of A & B is

(1) 7×103:1

(2) 4.2×104:6

(3) 2.5×105:1

(4) 7×104:1

View Answer with Explanation

Q:-106. A. The vertical profile of salinity distribution in the mixing zone of different type of estuaries (A,B & C) are presents in the figure. Identify A,B and C.

The mixing zone of different type of estuaries (A,B & C) are presents in the figure

Mixing Zone of Different Type of Estuaries

The mixing zone of different type of estuaries (A,B & C) are presents in the figure

  1. A is vertically mixed, B is Slightly stratified and C is highly stratified

  2. A is Highly stratified, B is slightly stratified and C is well mixed

  3. A is highly stratified, B is vertically mixed, And C is slightly stratified

  4. A is vertically mixed, B is highly stratified and C is slightly stratified

    View Answer with Explanation

B. An estuary received significant amount of organic matter, which undergoes microbial decomposition within it causing the ratio of primary production to the community respiration to be less than 1(<1). this estuary will act and server as

(1) Autotrophic estuary and net source of CO2

(2) Heterotrophic estuary and net sink of CO2

(3) Auto tropic estuary and net sink of CO2

(4) Heterotrophic estuary and net source of CO2

View Answer with Explanation

C. In a well-mixed estuary the correlation between the horizontal distributions of salinity (S) and the distance in km from the sea and (D) evolved a regression equation as s=0.8D+40 . The salinity instruction in this estuary would be up to

(1) 40km

(2) 32km

(3) 50km

(4) 40.8km

View Answer with Explanation

Q:-107. A particular species of foraminifera is considered to be an indicator of colder sea surface temperature. Where would you find them to be most abundant?

(1) In the modern surface sediments of the Western Arabian Sea

(2) In the modern surface sediments of the Bay of Bengal

(3) In the modern surface sediments of the central Indian Ocean

(4) In the sediments of the Western Arabian Sea deposition during the last glacial maximum

View Answer with Explanation

B. Higher oxygen isotopic ration in the ocean water can indicates

(1) Higher sea surface temperature

(2) Higher salinity

(3) Lower conductivity

(4) Lower dissolved oxygen

View Answer with Explanation

C. In the ocean in general, the biological productivity is lower during the warm periods and higher during the glacial periods (increased winds). But in the Western Arabian Sea, the trend is opposite. This is because

(1) Warmer temperature suppress photosynthesis

(2) Cooler temperature enhance photosynthesis

(3) Higher salinity is detrimental to productivity

(4) Warmer climate enhances the monsoon, which causes the upwelling of cold water from below

View Answer with Explanation

Q:-108. A The main contribution of marine bacteria in biogeochemical cycles is to

(1) Provide nutrients to phytoplankton

(2) Compete with phytoplankton for nutrients

(3) Pollute the ocean

(4) Create toxic blooms

View Answer with Explanation

B. If the zooplankton feeding keeps pace with the rate at which phytoplankton divide (i.e grow),

(1) Both the phytoplankton biomass and the zooplankton biomass will increase

(2) The phytoplankton biomass may remain the same, but the zooplankton biomass may increase

(3) The phytoplankton biomass and the zooplankton biomass will decrease

(4) Both the phytoplankton biomass and the zooplankton biomass will decrees

View Answer with Explanation

C. Phytodetritus is cause by dead

(1) Fish

(2) Corals

(3) Phytoplankton

(4) Phytoplankton and zooplankton

View Answer with Explanation

Q:-109. A In the global oceanic distribution, coral reefs are limitation to the shallow

(1) Tropical and subtropical water that remain warmer than 18°C

(2) Temperate water that remain cooler than 18°C

(3) Tropical and subtropical water that remain cooler than 18°C

(4) Polar water that remain warmer than 1.8°C

View Answer with Explanation

B. Coral bleaching cause high mortality of corals and is an event of great concern. Coral bleaching is described by

(1) Deposition of CaCO3 by corals

(2) More association of calcareous algae with corals

(3) Expulsion of symbiotic algae by corals

(4) Expulsion of symbiotic algae by corals

(5) Eutrophication and by algal blooms in coral reefs

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C. Increase atmospheric CO2 partial pressure and subsequent changes in seawater carbonate chemistry will cause

(1) Increase in seawater CO32 concentration and coral calcification rate

(2) Decrease of seawater CO32 concentration and coral classification rates

(3) Decrease in seawater CO32 concentration and increase in coral calcification rates

(4) Increase in seawater CO32 concentration and decrease in coral classification rates

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Q:-110.A If the ocean is in geostrophic balance,

(1) The currents will vary with time

(2) The current will be in steady state

(3) Non-liner terms will be large

(4) Rosy number will be large

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B. In a bar Tropic Ocean, the speed at the surface is 10cms1. The speed at 100m depth will be

(1) 5cms1

(2) 10cms1

(3) 8.5cms1

(4) 0cms1

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C. The Rossby number for a mid-latitude ocean current of 1ms1 over a distance of 1000km will be

(1) 1

(2) 100

(3) 0.01

(4) 0.1

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