iari phd entrance question paper 2011 - agril engg (water science & engg.)

7/29/2019 IARI PhD Entrance Question Paper 2011 - Agril Engg (Water Science & Engg.)

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Post Graduate SchoolIndian A gricultural Research Institute, New DelhiI iE x a m i n a t i o n f o r A d m i s s io n t o Ph.D. P r o g r a m m e 2011-2012

Please Note :(i) This question paper contains 12 pages. Please check wh it h e r a ll the pages arepr inted in th is set. Report discrepancy, if any, immediately to the invigilator.(ii) here shall be NEGA TIVE marking for WRO NG answers in the Mult@leChoice type questions (No. I to 130) which carry one mark each. For everywrong answer 0.25mark will be deducted.

5. To address the problems of sustainable andPART - (GeneralAgriculture) holistic development of rainfed areas,including appropriate farming and livelihood

M u l t i p le c h o i c e q u e s t i o n s ( No . 1 to 30). system approaches, the Government of IndiaC h o o s e the correct answer (a, b, c or d) has set up theand en te r your choice in the c i r c le ( b y a) National Rainfed Area Authorityshading a on the OMR - b) National Watershed Development Project forRainfed Areasa n s w e r s h e e t a s p e r t h e instructions C) National On RainfedAreasg i v e n on t h e a n s w e r s h e et . d) Command Area Development and WaterManagement Authority1. Which of the following crops have beenapproved for commercial cultivation in India? 6. Which of the following sub-schemes are nota) Bt cotton and Bt brinjal covered under the Rashtriya Krishi Vikasb) Bt cotton and Golden Rice Yojana?c) Bt maize and Bt cotton a) Extending the Green Revolution to easternd) Bt cotton only indiab) Deveiopment of 60,000 pulses and oilseeds2. This year (2010-11) the expected food grain villages in identified watershedsproduction n India is c) National Mission on Saffrona) 212 million tonnes d) National Mission on Bam boob) 220 million tonnesC) 235 million tonnes 7. -Th e minimum support price for the comm ond) 250 million tonnes variety of paddy announced by theGovernment of lndia for the year 2010-113. The genome of which of the following crops wasis still not completely sequenced? a) 7 1030a) Rice b) t 1000b) Soybeanc) Sorghum c) i 980d) Wheat d) t 9508. According to the Human Deveiopment4. According to the Approach Paper to the 12Ih Report 2010 of the United Nations, India'sFive Year Plan, the basic objective of the12Ih plan is rank in terms of the human developmentindex isa) inclusive growth a) 119b) Sustainable growth b) 134c) Faster, more inclusive and sustainable c) 169growthd) Inclusive and sustainable growth d) 262


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Subject : hD -Agricultural Engineering Soil arid Nater Conservafion Engineering) - 2011 29. Which of the following does not apply to SRImethod of paddy cultivation?a) Reduced water applicationb) Reduced plant densityc) Increased application of chemical fertilizersd) Reduced age of seedlings10. Which organic acid, often used as apreservative, occurs naturally in cranberries,prunes, cinnamon and cloves?a) Citric acidb) Benzoic acidc) Tartaric acidd) Lactic acid11. C otton belongs to the familya) Cruclferaeb) Anacardiaceaec) Malvaceaed) Solanaceae12. Photoperiodism isa) Bending of shoot towards source of lightb) Effect of lightldark durations on physiologicaiprocessesc) Movement of chloroplast in cell in responseto lightd) Effect of light on chlorophyll synthesis13. Ergot disease is caused by which pathogenon which host?a) Claviceps purpurea on ryeb) Puccinia recondita on whea tc) Drechlera sorokiniana on whea td) Albugo candida on mustard14. Rocks are the chief sources of parentmaterials over which soils are developed.Granite, an importan t rock, is classified asa) Igneous rockb) Metamorphic rockc) Sedimentary rockd) Hybrld rock15. Wh ich one of the following is a Kharif crop?a) Pea rl milletb) LentilC) Mustardd) Wheat16.The coefficient of variation (C.V.) iscalculated by the form ulaa) (Mean1S.D.) x 100b) (S.D.1Mean) x 100c) S.D.1Meand) Mean1S.D.

17. Which of the following is commonly referredto as muriate of po tash?a) Potass ium nitrateb) Potassium chloride ,c) Potass ium sulphated) Potass ium silicate18. Inbred lines that have same geneticconstitution but differ only at one locus arecalleda) Multi linesb) Monohybridc) lsogenic linesd) Pure lines19. For applying 100 kg of nitrogen, how muchurea would one use?a) 45 kgb) Ill gc) 222 kgd) 333 kg20. The devastating impact of plant disease onhuman suffering and survival was firstrealized by epldemic ofa) Brown spot of rice in Bengalb) Late blight of potato in USAc) Late blight of potato in Europed) Rust of wheat in India21. The species of rice (Ofyza) other than 0.sativa that is cultivated Isa) 0. rufipugonb) 0. longisteminatac) 0. laberrimad) 0. ivara22. The enzyme responsible for the fixation ofC 02 n mesophyll cells of C-4 plants isa) Ma lic enzymeb) Phosphoenol pyruvate carboxylasec) Phosphoenol pyruvate carboxykinased) RuBP carboxylase23. Which one of the following is a 'Vertisol'?a) Black cotton soilb) Red sandy loam soilc) Sandy loam sodic soild) Submontane (Tarai) soil24.What is the most visible physicalcharacteristic of cells in m etaphase?a) Elongated chromosomesb) Nucleus visible but chromosomes notC) Fragile double stranded loose chromosomesd) Condensed aired chromosomes on the cellplate


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Subject : hD -Agricultural Engineering (Soil and Water Conservation Engineering)- 2011 325. All weather phenomena like rain, fog an dmist occur ina) Troposphereb) Mesospherec) Ionosphered) Ozonosphere26. Which of the following elements is commonto all proteins and nucleic acids?a) Sulphurb) Magnesiumc) Nitrogend) Phosphorous27. Silt has intermediate characteristics betweena) Sand and loamb) Clay and loamc) Loam and graveld) Sand and clay28. Certified seed is produced froma) Nucleus seedb) Breeder seedc) Foundation seedd) Truthful seed29. Seedless banana is ana) Autotriploidb) Autotetraploidc) Allotriploidd) Allotetraploid30. W hich one of the followlng is used to test thegoodness-of-fit of a d istribution?a) Norm al testb) t-testc) Chi-square testd) F-test

PART- /I (Subject Paper)Multlple choice questions (No. 31 to 130).Choose the correct answer (a, b, c or d)and enter your choice in the circle (byshading with a pencil) on the OMR -answer sheet as per the instructionsgiven on the answer sheet.31. The seiies a+ar+a?+ ...+arn-' s aa) Geometric seriesb) Harmonic seriesC) Logarithmic seriesd) Taylor's ser ies32. The instrument used to measure the area ofa map is known asa) Dumpy levelb) Theodolitec) Piannimeterd) Current meter

33:lnitlal velocity o f an objec t is 2 mls . Howmuch will it travel in 10 seconds ifacceleration is 4 m lseclsec?a) 20 mb) 80mc) 18Omd) 220 m34. Bourdon gauge is a device to measurea) Torqueb) Forcec) Accelerationd) Pressure35. A thermostat is used fora) Temperaturecontrolb) Temperaturemeasurementc) ' Lowering the tkmperatured) Increasing the temperature36. Solar cells are made ofa) Aluminiumb) Siliconc) Radiumd) Platinum37. The equation x2+ix+l=0,where i = o hasa) Two real rootsb) Two imaginary rootsc) One real and one imaginary rootd) Infinite number of roots38. The slope of curve y=(5/3 )x2 at x=2 is givenbya) 513b) 1013c) 2013d) 1039. The sum of a complex number (a+ib) andthat of its conjugate complex number isequal toa) ab) 2ac) 2a+2bd) 2a-2b40. For the condition when 9 tends to zero, thevalue o f Sin 8 tends toa) CosOb) Tan 0C) co t 0d) Sece41. The system of linear equationx+3y=42x+6=7hasa) Unique solutionb) Many solutionsc) No solutiond) Imaginary solution


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Subject : hD -Agricultural Engineering (Soil an d Water Conservation Engineering)- 011 442. The objective function z=x2+2/x2 withunconstrained xa) has a minimum finite value oniyb) has a maximum finite value oniyC) has both a minimum and a maximum valued) cannot be optimized43. Llght year is the unit ofa) Timeb) Distancec) Light intensityd) Speed of rotation44. if sin h=1/2, the vaiue of cot A will bea) 6b) I/&c) n / 2d) 110 ~.45. Photosynthesis in plants takes place in theradiation wavelength ofa) 200-500 nmb) 300-600 nmc) 400-700 nmd) 500-800 nm46. y2=4ax is the form of equa tion of aa) Straight lineb) Circlec) Parabolad) Ellipse

-+ A A47. Consider two vectors FI= f+ 5k and = 3j+4k.The m agnitude of the scalar product of thesevectors isa) 20

48. (dldx) tan"x2 isa) 2x/(l+x2)b) 2x/(1+$)c) 2x sec x2d) 2x/(sec x )49. An iron baii and a wooden baii of the sameradius qre released from a height 'h' in

vacuum..,The time taken by both of them toreach ground area) Unequalb) Exactly equalc) Roughly equald) Zero50. LVDT isa) Linear variable differential transducerb) Least variable dual transformerc j Least variable differential transducerd) Linear variable differen tial transformer

51. The first derivative of eX2w.r.t. x isa) eX2b) 2x ex2c) x2 ex'd) eX2/x252. Bernoulli's equation relatesa) Total energ ies at two pointsb) Kinetic energies at two pointsC) Potential energies at two pointsd) Discharges at two points53 A catchment area ptoduces runoff as 40% ofthe rainfall. if the rainfall is 5 cm and thecatchment area is 100 ha, the capacity of thepond to store (he entire runoff isa) 200 m3b) 500 m3 ,

54. Seepage loss in irrigation network isa) Desirable as it contributes to ground waterrechargeb) Desirable as it protects the overtopping ofcanal bankc) Contributes to the irrigation by subsurfaceflowd) Undesirable as it causes water table rise andsalinity problem55. Super critical fiow in a flume is one for whichthe vaiue of F isa) Less than 1hl 1-, .c) Greater than 1d) No relation56. For open channel flow measurement underpartially submerged flow condition, the bestdevice isa) V-notchb) Parshali flumec) Weird) Orifice meter57. Irrigation channels are usually designed fora) Steady and uniform flowb) Unsteady and uniform fiowc) Unsteady and non-uniform iowd) Steady and non-uniform flow58. irrigation efficiencies in the command area isapproximatelya) 20%b) 30%c) 40%d) 60%


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SubJect: Ph D -Agrlcultural Engineering (So il and Water Conservation Engineering) - 2011 559. The catchment area of a reservoir lies in itsa) Upstreamb) Downstreamc) No relationd) None of the above60. The equation: S2+/6x2+ S2+/SY2 0, when @ is

the velocity potential and x and y aremutually perpendicular space coordinates, isknown asa) Boussinesque equa tionb) Navier-Stokes' equationc) Laplace equationd) Darcy's equation61. A ra infall simulator is usefu l in studyinga) Wind effect on rainfallb) Space.distribution of rainfallc) Drop size distribution of rainfalld) Soi l erosion62. The H-Q curve of a centrifugal pump isa) Horizontalb) Verticalc) Risingd) Failing63. T he area under a hydrograph represents thea) Watershed areab) Peak runoff ratec) Average runoff rated) Volume of runoff64. Coshocton wheel is used fora) Sediment samplingb) Flow measurementc) Water liflingd) Hydel power generation65. The cuive number for watershed runoffestimation varies betw eena) -100 to 100

66. Drainage density of a watershed is the ratioofa) Total nuniber of streams to watershed areab) Total length of streams to watershed areac) Total number of streams to total length ofstreamsd) Total length of streams to total number ofstreams67. he term CAD stands fora) Computerized Acces s of Datab) Canal Approaching Dropc) Canal Alignment Domaind) Command Area Developm ent

68. Occurrence of ground water can be d etectedbya) Water meterb) Current meter 'c) Neutron meterd) Resistivity mete r69. A drop spillway is used fora) Erosion controlb) Flow measurementc) Flow regula tiond) Flow diversion70. A plot between rainfall intensity versus timeis called asa) Hydrographb) Mass curve ,c) Hyetographd) lsohyet71. Mathem atical equation used to describe

saturated-unsaturated flow of w ater in dripirrigationa) Richa rd equationb) Con tinuity equationc) Bernoulli's theoremd) Laplace equation72. Irrigation frequency is a function ofa) Crop onlyb) Soil onlyc) Crop and soil onlyd) Crop, soil and climate73. A soil sample has porosity of 40 percent, its

void ratio isa) 0.06b) 0.28c) 0.40d) 0.6674. Salinity of irrigation wate r is measured bya) SAR valueb) Electrical conductivity valuec) pH vaiued) ESP vaiue75. Open channel flow is said to be uniformwhena) dyldx=Ob) dyldt=Oc) dvldt=constantd) dv/dx=constant76. A cipoiletti weir is a trapezoidal weir havingside slope ofa) 1:2b) 1:3c) 1 4d) 1:l


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Subject :P ~ DAgricultural Engineering (Soil and Water Conservntlon Engineering)- 011 6

77. An automatic stream fiow recorder chartgives the record ofa) Discharge vs. Timeb l Velocity vs. Timec) Stage vs. Timed) Discharge vs. Stage78. Practically which of the following type o f flowcannot occura) Steady and uniformb) Steady and non-uniformc) Unsteady and uniformd) Unsteady and non-uniform79. PF is defined asa) The logarithm of negative pressure head incm of waterb) Logarithm of pressure head in cm of waterc) Pressure head in cm of waterd) None of the above80 . Drip irrigation is recommended when thewater is saline becausea) Total water used in drip system is very smallb) Atleast area between plants will be savedfrom becoming salinec) Due to continuous but low discharge, highsalt concentration cannot build up near therootd) As and when need, fresh water can bepumped through the system to flush out thesalts81. Waraband i refers toa) Giving irrigation by turnsb) Rectangulation of fieldsc) Land consolidationd) A water law evicted by Warren Hastings82 . Combined use of surface and groundwaterfor crop production is calleda) Consumptive useb) Conjunctive usec) Joint used) Optimal use83 . in surge irrigation, water is released to thefield ,a) Under phessureb) Continuouslyc) Intermittentlyd) Below the surface84 . Gabions are used fora) Flood contro lb) Flow measurementc) Storage of runoffd) Gully stabiliza tion

85. Drip irrigation is mos t suitable for irrigatinga) Paddyb) Wheatc) Cottond) Orchard86 . A tile-drainage network is effective ina) Controliing water tableb) Controliing weed growthc) Controlling evapotranspiration lossesd) Removing the profile water87. The Hooghoudt's equation for spacing ofdrains is applicable'toa) Any type of soilb) Only for sandy soilc) Non-homogenegus soild) A homogeneous soil with an impermeablelayer below it88. A Persian wheel is aa) Wate r lifting deviceb) Device to generate electricity from waterpowerc) Wind mill wheeld) Water distribution device89. Establishment of shelte rbeit reducesa) Floodb) Droughtc) Incoming radiationd) Wind erosion90. Total energy line (TEL) represents the sumofa) Pressure head and kinetic headb) Kinetic head and datum headC) Pressure head and datum headd) Pressure head, kinetic head and datum head91. The head loss due to friction when waterflows through a pipe is proportional toa) Velocityb) Square of velocityC) Square root of velocityd) Reciprocalof velocity92. A rice field is irrigated bya) Border methodb) Basin methodC) Furrow methodd) Corrugation93. Strip cropping consists ofa) Growing crops along the slopeb) Growing crops across the slopeC) Alternate strips of row and close growingcropsd) None of the above


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Subject :PhD - Agricult ura l Eng lneering Soil and Water Conservatlon Englneerfng) - 2011 7

94. For soil conservation purpose, the land isusually classified ina) 4 classesb) 6 classesc) 8 classesd) 10 classes95. At saturation a clay soil will hold more waterthan a sandy soil due toa) Ink bottle effectb) Clay particles are charge dc) Clay has high poros ityd) Clay has large pores96. Which technology is u sed in locating a pointon the earth surface?a) GIsb) GPS .c j RB Dd) Split Plot Design97. Ground water recharge by surface floodingof w ater is gove rned primarily bya) Infiltration rateb) Transmissivityc) Hydraulic conductivityd) Storage coefficient98. The most wind erosion prone state in thecountry isa) Gujaratb) Rajasthanc) Punlabd) Karnataka99. Soil erosion, if detected in the toe region ofan earth dam, can b e checked bya) Compactionb) Grass liningc) Flattening the dow nstream sloped) Stone pitching100. The term PRA stands fora) Planned Resource Allocationb) Probable Resource Allocationc) People's Response Analysisd) Participatory Rura l Appra isal101. If V is telocity and I is hydraulic gradient,then in the relation V=KI, K has thedimension ofa) LT "b) DimensionlessC) T -'d) L T ' ~102. An axial flow pum p is ideal fora) Low dischargeb) High dischargec) Pumping from tubewelld) Pumping from dug well

103. The concept of equivalent depth insubsurface tile drainage was given bya) Hooghoudtb) KirkhamC) Gloverd) Ernst104. The runoff from a watershed of 18 ha areahaving rainfall intensity of 10 cm/h andrunoff coe fficient0.3 isa) 0.5 m3/sb) 1.0 m3/sc) I5 m3/sd) 3.0m3/s I105. Wh ich of the following is a dimensionlessnumber?a) Manning's coeffibent, 'n'b) Pipe friction factor, 'fc) Chezy's coefficient, 'c'd) Haz en-W illiam coefficient, 'Cn'106. The specific yield for an unconfined aquiferisa) Grea ter than porosityb) Less than porosityc) Equal to porosityd) Unre lated to porosity107. A lysimeter is used to measurea) Evaporationb) Evapotranspirationc) Infiltrationd) Seepage108. Wells that are used for obtaining only freshwater from fresh water aquifer under lainwith deep brackish wate r aquifer, are calleda) Cavity wellsb) Bore wellsc) Skimming wellsd) Semi artesian wells109. Sprink ler irrigation is Ideally suited whena) Wind velocity is highb) Water is abundantc) Land is flatd) Soil is light1lO.A centrifugal pump delivers 10 L/secagainst a total head of 7.5 m. The waterpower isa) 1 kwb) 0.746 kwc) 10 kwd) 7.5 kw111. The ratio of inertia forces to g ravitationa lforces is calleda) Reynold's numberb) Froude numberc) Euler numberd) Webe r number


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Subject : hD -Agricultural Engineering Soiiand Water Conservation Engineering) - 2011 8112. A tensiometer is use d to m easurea) Tensile strength of a wireb) Moisture content of soilc) Moisture content of leavesd) Tensile strength of concrete113. The term saltation refers toa) Salt movem entb) Salinization of soilc) Soil particle movementd) Reclamation of saline soil by growing saltresistant plants114. The water table is measured using a devicea) Pitot tubeb) Piezometerc) Anemometerd) Manometer115. The instrument TDR is used to determinea) Radiationb) Wind velocityC) Soil moistured) Transverse Diffusion Rate116. In runoff estimation by Curve Numbermethod, the abbreviation AMC stands fora) Actual Moisture Contentb) Available Mois ture Contentc) Average Moisture Contentd) Antecedent Mois ture Condition117. An unconfined aquifer is also known asa) Artesian aquife rb) Water table aquiferc) Leaky aquife rd) Perched aquife r118. Curve number representsa) Rainfa ll propertyb) Watershed featurec) Runoff trendd) Stream flow feature119. The relationship between particle density(pa), bulk density (pb) and porosity (n) ca nbe expressed by the following relationship

120. At c ritical condition of flowa) Specific energy is minimumb) Specific force is maximumc) Viscous force is minim umd) Total force is maximum121. Common method of estimating soil erosion

by water Isa) Water measurementb) Runoff samplingC) Sol1 sam plingd) Visual obse~a t i on122. The cumulative nfiltration equation isI = 2t05 I n cm, t i n minutes).The instantaneous infiltration rate at 4minutes froni s!art wi ll bea) 0.1 cmlminb) 0.5 cmlminc) 1.0 cmlmind) 1.5 cmlmin123. Mulching s used fora) Conserving soil mo istureb) Ensuring good germinationc) Preventing soil compactiond) increasing rrigation applica tion efficiency124. The line joining the static water levels inseveral wells, excavated through a confinedaquifer, is know as thea) Cone of depressionb) Piezometric surfacec) Perched water tabled) Hypsometric curve125. Removal of a thin and fairly uniform layer ofthe soil from the land surface by runoffwater is calleda) Water erosionb) Sheet erosionC) Glacial erosiond) Geologic erosion126. An average value of sustainable dischargefrom an open well isa) Less than 5 il sb) 5-10 11sc) 10-15 ilsd) More than I 5 11s127. The intensity of rainfa ll variesa) Directly with duration of rainfallb) Inversely with duration of rainfallC) Exponentially with duration of rainfalld) No relation is established


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Subject : hD - Agricultural E~~ ginee ringSoilwrrl Water Conservation Eng ineering)- 20 1 1 9128. Stream gauging can generatea) Hygrographb) HydrographC) Hyetographd) Hype-0-graph129. Terracing is done mainly toa) Make the hill top access ibleb) Reduce earthworkc) Increase the beauty of hillsd) Conserve soil and water130. Insitu hydraulic conductivity is determ ined

bya) Pumping testb) Permeameterc) Double ring infiltrometerd) Auger hole metho dMatching type questions (No. 131 to 140);all questions carry equal marks. Choosethe correct answer (a, b, c, d or e) foreach sub-question (i, ii, iii, iv and v) andenter your choice in the circle (byshading with a pencil) on the OMR -answer sheet as per the instructionsglven on the answer sheet.131i) Filtration unit a) Laminar flowif) LT -' b) Arid & seml-arid regionsili) Mulching c) Ground water rechargeshaftiv) Reynold's number d) Darcy's lawv) Hydraulic gradient e) Hydrau lic conductivity132.i) Force a) [MC'T -'Iii) Accelera tion b) [ML'T '2iii) Power ' C) [MK'T 'iv) Viscosity d) [LTv) Stress e) [MLT .2]133.i) Ring infiitrometer a) Regulatorii) Flow control b) Infiltration rateiii) Tensiometer c) Soil moistuteiv) Curve number d) Surface runoffv) Current meter e) Velocity of flow

134.I) Cen tral Arid Zone Resea rch a) Karnallnstitutei ~ )ndian Grassland & Fodder b) BhubaneshwarResearch lnstituteiii) C entral Research lnstitute for c) JhansiDryiand Agricultureiv) Directorate of W ater d) HyderabadManagement ResearchV) Central Soil Salin~tyResearch e) Jodhpurlnstitute

135.i) Kirpich formula a) Cana l designii) Kostiakov formu la b) Aquifer parametersiii) Jacob-Hantush method c) Unit hydrograph theoryiv) Sherm an d) Time of concen trationv) Kennedy theory e) Infiltrat ion depth

136.i) Irrigation a) Terraceii) Drainage b) Surgeiii) Water pumping q ) Foot valveiv) Soil conservation d) Land reclama tionv) Wate r resources e) Dam

137.i) Infiltration a) Discharge measurementii) Sunsh ine b) Raingaugeiii) Rain fall c) Campbell-stroke'srecorderiv) Parsha ll flume d) Drip irrigationv) Pressure e) Phillipscompensating device138.i) IUH .ii) .Manning's equationiii) Workiv) ForceV) Power

139.i) Computerii) Latitudeiii) Sim ulationiv) Water balancev) Hydraulic jump

140.i) Return periodii) Weatheringiii) Tile drainiv) Vertical drainV) M ohr circle

a) Wattsb) Newtonsc) Hydrographd) Erge) Velocity

a) Stilling basinb) Modelc) Day lengthd) Logice) Rainfall

a) Filterb) Tubeweilc) Design rainfalld)' Stress analysise) Rock


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Subject :Ph D - Agricultural Engineering (Soil and Wafer Conservation Engineering )- 2011 10

Short questions (No. 141 to 146); each question carries FIVE marks. Write answers,including computation Imathematical calculations if any, in the space provided foreach question on the question paper itself. .%141. A canal is carrying 1 m3/sec flow and the electrical conductivity of the water is 0.2 dS/m. It isproposed to supplement the canal flow by pumping ground water which has a salinity of 3 dS/m. Ifthe m aximum permissible salinity o f the mixed water is 0.5 dSlm, flnd the number of the tubewells

that may be commissioned, each with a capa city to discharge 20 Llsec.

142. Why and how is a tubewell developed?,I > " . . I " n .


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Subject :PhD -Agricultural Engineering (Soiland Water ConservnlionEngineering)- 2011 11143. Draw and explain typical characteristics curve of a centrifugal pump.

144. Name the different components of a total hydrograph and explaln with the help of neat sketcheshow are these components found?


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Subject :Ph D - Agricultural Engineering (Soil and Water ConservaflonEngineering)- 2011 12145. What is a critical flow? Why the criticality of flow is essential in developing head dischargerelationship of flow in an open channel?

146. Estimate the specific surface area of a soil particle resembling the shape of a sphere with radius0.03mm contained in a cubical packing.

iari phd entrance question paper 2011 - agril engg (water science & engg.)

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