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University ofHyderabad
FNIRANCEEXAMlNATION 2012· Ph. D inEarth Space Sciences


1. Kepler's second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of

energy

angular momentum

linear momentum

none of these

2. The period of geostationary artificial satellite of earth is

6 hours

12 hours

24 hours

365 days

3. The escape velocity of projection from the earth is approximately 6400 km)

7km/sec

112km/sec

12.2km/sec

1.1km/sec

4. If the radius of the earth were to shrink by its mass remaining the same, the acceleration due to gravity on the earth's surface would

decrease by

remain unchanged

increase by

will increase by 9.8%


5. What is the most common chemical element in the universe?

Hydrogen

Oxygen

Nitrogen

Helium

6. What is the pH of potable water?

4

5

7

9

7. What is the rest mass of a photon?

0.5

0

1

1.1

8. Crystals are formed when lava

cools slow

cools fast

doesn't cool

None of the above

9. The equatorial radius of the Earth is approximately

637 km

6370 km

63700 km

63520 km

10. The following table gives the performance of 100 students in statistics examination.

Marks 50 60 70 80 90 100

No of students 10 20 25 25 10 10

The median and mode(s) are:

70,70 and 80

80 and 80

70 and 70

40 and 40

11. A scatter plot shows

The direction and strength of a relationship between two variables.

The linear relationship between two variables.

The prediction of value one variable knowing the value of the other variable.

None of the above


12. Below is the probability distribution function for occurrence of number in the single roll of dice.
<img src='./qimages/1915-12.jpg'>

What is the probability that X

1/6

2/6

1/36

1/3

13. One hundred people were asked the number of Ice creams they consumed during last summer. Five people took no ice creams, 20 people consumed 8 ice creams, 25 people consumed 12 ice creams, 20 people consumed 16 ice creams and 30 persons consumed 32 ice creams. What percent of people consumed 12 or more ice creams?

about 25%

about 50%

about 75%

about 10%

14. Suppose that the random variable X has the following probability distribution <img src='./qimages/1915-14.jpg'> Then is

1.0

0.1

0.5

0.7

15. If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

h

2h

h/2

h2

16. The relation between escape velocity and orbit velocity is

Ve root2 V orb

ve 1/root 2 V orb

ve 2 V orb

ve=root3 V orb

17. A person carrying a weight jumped down a wall of height h. Before he reaches the ground he experiences a load of

zero

W/2

W

2W

18. The point lies in quadrant

I

II

III

IV

19. The distance between the two points and is

11

root13

13

169

20. The centroid of the triangle formed by the vertices and is









21. The slope of the 3x+4y-7=0 is

3/4



4/3



22. Ocean surface currents are mainly caused by

Wind

Tides

salinity differences

density differences

23. Coriolis force arises due to

Revolution of the earth around the sun

rotation of the earth around its axis

revolution of the earth-moon system around the sun

gravitational attraction of the earth-moon system


24. Hybridization state of sulfur and percent d-character in SF6 will be

sp3d2 and 33.3%

Sp3d2 and 20%

sp3d and 33.3%

sp3d and 25%


25. The molecule that contains both covalent and ionic bonding

CCl4

CaCl2

NH4Cl

H2O

26. The number of moles of oxygen in 1 Lair containing 21% oxygen by volume, in standard condition is

0.186mol

0.21mol

2.10mol

0.0093mol

27. The true shape of the Earth is best described as a

perfect sphere

perfect ellipse

slightly oblate sphere

circle

28. What is the metamorphic type of mylonite?

Regional metamorphism

contact metamorphism

dynamic metamorphism

All the above

29. Which factor affects recrystallization most?

pressure

temperature

liquid with chemical fluid

oxygen

30. Approximately how long does an earthquake P-wave take to travel the first 6500 kilometers after the earthquake occurs?

6.5min

8min

10min

18.5min

31. During which era did the initial opening ofthe present-day Atlantic Ocean most likely occur?

Cenozoic

Mesozoic

Paleozoic

Late Proterozoic

32. Felsic and mafic are terms used by geologists to describe

composition of continental and oceanic crust

behavior of earthquake waves

the mechanical behavior of rocks

none of these

33. The inner core is most likely composed of

silicon

oxygen

sulfur

iron

34. The principle of continents being in buoyant equilibrium is known as

isostasy

the principle of buoyant equilibrium

the elastic rebound theory

none of these


35. Positive gravity anomalies are often associated with

deep ocean trenches

ore bodies beneath Earth's surface

large cavern systems beneath Earth's surface

all of these

36. The S-wave shadow zone is evidence that

the outer core is liquid

the outer core is composed of iron and nickel oxides

the inner core is solid

it is very hot near the core

37. The mean radius of the earth is its angular speed on its own axis is wand the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be

r2g/w

R2w2/g

RGw2

R2g/w2

38. A thin uniform, circular ring is rolling down an inclined plane of inclination 30° without slipping. Its linear acceleration along the inclined plane will be

g/2

g/3

g/4

2g/3

39. When body is raised to a height equal to radius of earth, the Potential energy change is

MgR

MgR/2

2MgR

(D)none of these

40. The radii of the earth and the moon are in the ratio 10:1 while acceleration due to gravity on the earth's surface and moon's surface are in the ratio 6:1. The ratio of escape velocities from earth's surface to that of moon surface is

10:1

6:1

1.66:1

7.74:1

41. If by applying a force, the shape of a body is changed, then the corresponding stress is known as

Tensile stress

Bulk stress

Shearing stress

Compressive stress

42. The physical evidence that the core is composed mostly of iron is

the known mass ofEarth requires material of high density at the core

scientists have sampled the core and determined its composition

volcanoes regularly erupt material from the core to the surface

all of these

43. Convection is likely occurring in

the mantle

the outer core

both the mantle and the outer core

throughout the Earth

44. The interior composition and structure ofEarth have been deduced in part from

studies of meteorites

deep drilling projects

analyses of the behavior of seismic waves

all of these


45. Heat inside Earth

is generated by radioactive decay

is uniform throughout the interior

decreases with increasing depth

none of these

46. Heat flow to the surface of Earth

varies from place to place

is highest in areas of active volcanism

is lowest in stable continental interiors

all of these

47. The boundary between the crust and mantle

coincides with the boundary between the asthenosphere and lithosphere

is marked by a change is velocity of seismic waves

is the source of the S-wave shadow zone

none of these

48. The composition of the upper mantle is known because

samples of mantle rock have been analyzed

meteorites are believed to be similar to the mantle

some caves on Earth extend into the mantle

none of these

49. Area of triangle formed by the vertices and is

14

-14

28

-28

50. The value of Sin30.Cos60+Cos60.Sin30=

0

1





51. Value of Cos1.Cos2.Cos3....Cos179

1



0

None of these

52. If theta is acute and cot theta=15/8 then cot theta is

17/8

8/15

15/17

17/15

53. When moisture-laden winds are blocked by a mountain chain, intense rainfall happens as in Western Ghats regions. in such cases which one of the following factors is dominantly responsible for intense precipitation?

Mountain heights

Mountain orientation with respect to wind direction

(C)Ascent induced by latent heat of condensation of water vapor

Vegetation on the mountain slopes


54. During storms, thatched roofs of huts are lifted and are carried away by wind. The basic principle that governs the process is

Bernoulli's principle

Coriolis force

Pascal's law

Archemedis principle

55. A geostationary satellite orbiting at an altitude of 36,000kms has a period of 24 hours. What is the orbital period of a satellite orbiting at an altitude of 1000 km(take the radius of the earth km)

4/root6hr

2/3hr

3/2hr

1/9hr

56. in the rain shadow area (leeward side of a mountain),the air mass is characterized by

Warm and stable conditions

Warn and unstable conditions

Cold and stable conditions

Cold and unstable conditions

57. If CO2 in sea water is increased by the addition of carbonate and bicarbonate ions from rivers, the ocean will become

More acidic (pH 6.5)

neutral in pH(PH7)

less acidic (pH 8.5)

more alkaline (pH 8.4)

58. The chief source of atmospheric heat is

incoming solar radiation

infrared radiation from the earth

ultraviolet radiation absorbed by the ozone layer

far-infrared radiation


59. In the troposphere, core of maximum zonal wind speed is called

storm track.

strong westerly

mean jet stream axis

westerly flow

60. The depth at which thermocline starts in the oceans

increases from equator to poleward

decreases from west to east

increases from west to east

decreases from equatorial to polar regions

61. Perched water table lies

above water table

below water table

at the same level as water table

at an angle to water table


62. Eustatic changes in sea level are visibly marked in the

Pliestocene

Paleocene

Paleozoic

Cretaceous


63. The world wide jet stream that occurs in winter above the troposphere resulting from a very steep stratospheric thermal gradient is the

sub-tropical jet stream

polar-night jet stream

sub-polar jet stream

Artic jet stream


64. Which one of the following constants is related to radiation?

Gravitational constant

Planck's constant

Critical constant

Boltzmann's constant


65. The velocity of thermal radiation is related to the velocity of light as

V

V<C

V C

None of the above

66. Translational kinetic energy of gas molecule,for one mole of the gas,is equal

3/2RT

2/3KT

1/2RT

5/2KT

67. Kinetic energy per unit volume is given by

E 3/2P

E 2/3P

E 1/2mv2

None of these

68. Energy supplied to convert unit mass of substance from solid to liquid state at its melting point is called

Latent heat of fusion

Evaporation

Solidification

Latent heat of fission

69. The r.m.s velocity of the molecules of an ideal gas is C at a temperature of 100K. at what temperature is r.m.s. velocity will be doubted?

200K

400K

300K

50K

70. According to kinetic theory of gases, at absolute zero of temperature

Water freezes

liquid helium freezes

Molecular motion stops

liquid hydrogen freezes


71. The catalyst used in the preparation of an alkyl chloride by the action of dry HCl on an alcohol is

anhydrous AlCl3

FeCl3

anhydrous ZnCl2

Cu

72. The nuclear reactor was invented by

Enrico Ferni

Eduard Jenner

Alexander Fleming

Albert Einstein Torricelli

73. What is the most common chemical element in the universe?

Hydrogen

Oxygen

Nitrogen

Helium

74. What is the rest mass of a photon?

0.5

0

1

1.1

75. Meniscus of mercury in capillary is

Concave

Convex

Plane

Cylindrical