IARI PhD Entrance Question Paper 2011 - Agril Engg (Food Processing)

7/29/2019 IARI PhD Entrance Question Paper 2011 - Agril Engg (Food Processing)

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2. This year (2010-11) the expected food grainproduction in lndia isa) 212 million tonnesb) 220 million tonnesc) 235 million tonnesd) 250 million tonnes

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

Discipline : Agricultural Engineering (Agricultural Processing & Structures)IDiscipline Code : 03; Sub code-01 R o l l N E ~ ! /~ -~ ~ ~

Please No te:(i)This question paper contains 13 pages. Please check wh ethe r a l l the pages arepr in ted in th is set. Repo rt discrepancy, if any, imm ediate ly to the invigilator.(ii) Tlzere shall be NEGATIVE marking for WRONG answers in the Multiple'Cltoice type questions (No. I lo 130) ~vliicltcarry , ne mark eaclr. For every~vro ng nswer 0.25 mark will be deducted.

3. The genome of which of the following cropsis still not com pletely sequenced?a) Riceb) Soybeanc) S rghumd) dheat

PA RT - I (General Agriculture)Multiple choice questions' (No . 1 t o 30).Choose th e correct answer (a , b, c or d)and enter your choice in the circle (byshading a on , t h e OMR -answer sheet as per the instructionsgiven on th e answer sheet .1. Which of the foilowing crops have beenapproved for commercial cultivation in India?a) Bt cotton and Bt brinjalb) Bt cotton and Golden Ricec) Bt maize and Bt cottond) Bt cotton only

4. Accord ing to t6e Approach Paper to the 12IhFive Year Plan, the basic ob ject~ve of the12Ihplan isa) Inclusive growthb) Sustainable growthc) Faster, more inclusive and sustainablegrowthd) Inclusive and sustainable growth

'

has set up the

Rainfed Areas

5. To address the problems of sustainable andholistic development of rainfed areas,including appropriate farming and livelihoodsystem approaches, the Government of Indiaa) National Rainfed Area Authorityb) National Watershed Development Project for, National Mission on Rainfed Areasd) Command Area Development and WaterManagement Authority6. Which of the following sub-sch emes art? notcovered under the Rashtriya Krishi VikasYojana?a) Extend ing the Green Revolution to easternIndia 'b) Development of 60,000 pulses and oilseedsvillages in identified watershedsc) Natlonal Mission on Saffrond) National Mission on Bam boo7. The minimum support price for the commonvariety of paddy announced by theGovernment of lndia for the year 2010-11was

8 According to the Human DevelopmentReport 2010 of the United Nations, India'srank in terms of the human developmentindex isa) 119b) 134c) 169d) 182


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Subject :Ph D -Agricultural Engineering (Agricullui aiProcessing& Structures) -2011 , 29. Which of the following does not apply to SRImethod of paddy cultivation?a) Reduced water aoolicationb j Reduced plant de kl tyc) Increased applicationo f 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. Cotton belongs to the familya) Cruciferaeb) Anacardiaceaec) Malvaceae.d) Soianaceae12. Photoperiodism isa) Bending of shoot towards source of lightb) Effect of lightidark durations on physiologicalprocessesC) Movement of chloroplast in cell in responseto lightd) Effect of light on chlorophyll synthesis13. Ergot disease is caused by which pathogenon which host?a) Ciaviceps purpurea on ryeb) Puccinia recondNa on wheatc) Drechlera sorokiniana on wheatd) Albugo candida on mustard14. Rocks are the chief sources of parentmaterials over which soils are developed.Granite, an important rock, is classified asa) Igneous rockb) Metam orphic rockc) Sedimentary rockd) Hybrid rock15. Which one of the following is a Kharif crop?a) Pea ri mille tb) Lentilc) Mustardd) Whed!16. The coefficient of variation (C.V.) iscalculated by the formulaa) (Mean lS D.) x 100b) (S D.IMean) x 100c) S D.IMeand) Mean1S.D.

17 . Which of the following is commonly referredto as muriate of potash?a) Potassium nitrateb) Potassium chloridec) Potasslum sulphated) Potassium silicate18.lnbred lines that have same geneticconstitution but differ only at one locus arecalleda) Multi linesb) MonohybridC) isogenic lines ,d) Pure llnes19. For applying 100 kg of nitrogen, how muchurea would dne, use?a) 45 kgb) I l l kgC) 222 kgd) 333 kg20. The devastating impact of plant disease onhuman suffering and survival was firstrealized by epidemic 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 (Oryza) other than 0.sativa that is cultivated isa) 0. rufipugonb) 0. longlsterninafac) 0. iaberrimad) 0. nivara22. The enzyme responsible for the fixation ofC 0 2 n mesophyll cells of C-4 plan ts Isa) Malic enzymeb) Phosphoenol pyruvate carboxylasec) Phosphoenol pyruvate carboxykinased) RuBP carboxylase23. Which one of the follow ing is a 'Vertisol'?a) Black cotton soilb) Red sandy loam soilc) Sandy loam sodic soild) Submontane (Tarai) soil24.What is the most visible physlcaicharacteristic of cells in metaphase?a) Elongated chromosomesb) Nucleus visible but chromosomes notc) Fragile double stranded loose chromosomesd) Condensed paired chromosomes on the cellplate


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Subject :PhD -Agricu ltural Engineering Ag rlcu lN~ ralP ces sing Strucfures)- 2011 325. All weather phenomena like rain, fog andmist 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 interm ediate characteristics betweena) Sand and loamb) Clay and loamC) Loam and graveld) Sand and clay28. Certified seed is produce d froma) Nucleus seedb) Breeder seedC) Found ation seedd) Truthful seed29. Seedless bahana is a na) Autotriploidb) Autotetraploldc) Aliotriploldd) Aliotetraploid30 Which one of the following is used to test thegoodn ess-of-fit of a distribution?a) Normal testb) t-testc) Chi-squa re testd) F-test

PART- 1 (Subject Paper)Multiple choice questions (No . 31 to 130).Choose the correct answer (a, b, c or d)and enter your choice in the circle (byshadlng with a pencil) on the OMR -answer sheet as per the instructionsgiven on the an swer sheet.

I31. A 5 hp motor with mechanical efficiency of60 per cent works for 2 hour. The energyconsumed by the mo tor will bea) 16.67 kw hb) 12.5 kw hc) 4.4 kwhd) None of the above

32. A point moves in a straight line so that itsdisplacement x metres at time '1' seconds Isgiven by x2'= 1+t2. Its acceleration at a time't' isa) 1/x3

33. The half-life of radium is 1600 years. Thefract~onof a sample of radium that wouldremain after 6400 years isa) 114 i Jb) 112

34.Three identical dice are rolled. Theprobability that the same number will appearon each of them isa) 116b) 1/18c) 1/36d) 3/2835. If hi an d h2are the characteristic X-rays andgammalrays respectively, then the relationbetween them isa) hl=l/h2b) h,=h2c) 11'hzd) hi


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Subject : Ph D - Agricultural Engineering (AgrlcrrlturalProcesslng& Sfrticfures)- 011 44O.For a given source of radiation, theabsorbance and reflectance values are 0.25and 0.65. respectively for a surface. Thevaiue of the transmittance should bea) 0.15b) 0.10C) 0.05d) 0.0041. Two towns A and B are 60 km apart Aschool is to be built to serve 150 students intown A and 50 students in town B. If the totaldistance travelled by ail 200 students is to beas small as possible, then the school shouldbe built ata) Town 8.b) 45 km from town AC) TownA -d) 45 km from town B42. The dimensional formula for Young'smodulus is

43. Current in a circuit is wattless ifa) Inductance n the circuit is zerob) Resistance in the circuit is zeroc) Current is alternatingd) Resistance and inductance both are zero44. Thermal conductivity of a wall is increased to

four times the existing vaiue. Consequently,the conductive heat flux, other parametersremaining the same, in comparison to theinitial value will bea) 0.25 timesb) 0.5 timesC) 2 timesd) 4 times45. A dimensionless num ber formed usingthermal diffusivity, time and length is knownasa) Biot numberb) Fourjer numberC) Prangtl numberd) Lewis number46. A thermodynam ic process taking place atconstant volume is ermed asa) Isobaricb) lsochoricc) Isentropicd) Adiabatic

47. Which of the following processes does notbelong to milk p rocessing?a) Homogenlz~tlonb) Pasteurizationc) Coolingd) Curing48. W hat i s th'e area requirem ent (mZ) for a cowin a stanchion barn?a ) 3.0b) 6.0C) 9.0d) 12.049. 100 tonnes o f paddy was harvested at 22%(w.b.) moisture content and it has to bebrought to a moisture content of 15% (w.b.).What is the estimated weight of paddy alterdrying?a) 90.4 t

50. Other factors remaining same, low er~n gstorage temperature by 5'C shoulda) Reduce the storage period to halfb) lncrease the storage period by 50%c) lncrease the storage period by a factor oftwod) No t affect the storage period significantly51. One of the parameters of the pe rformance ofa cyclone separator is the particle diameterThe chance of a pa rticle for separationa) lncreases linearly with the size of the particleb) Decreases linearly with the particle diameterC) Decreases with the square of the particlediameterd) lncreases with the square of the particlediameter52. Moisture content in an agricultural produce is80% (w.b.). its moisture content on dry basiswill bea) 100%b) 200%c) 400%d) 800% id53. The value of the differential - sin-'x) isdx


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Subject : PhD -Agrlcuttural Engineering (AgriculNtrtrl Processing 8r StrucNtr~s) 201154. In hyperbolic function, tanhx is equal to

55. In F-test, the test criterion F is the ratio ofa) Meansb) CV'sC) Variancesd) None of the above56. The Stefan-Boltzman law is applicable for

heat transfer bya) Radiationb) Conductionc) Convectiond) Both conduction and convection

61. Ratio of diameter of the largest Inscribingcircle to the dia me ter of the smallestcircumscribing circle is calleda) Roundnessb) Shape factorC) Sphericityd) None of the above62. Total heat content or energy level of amateria l is calleda) Enthalpyb) Entropyc) Thermal condyctivityd) Hea t transfer coefficient63. A ton of cefrigeration is equiva lent toa) 50 KCallmin ;b) 100 KCallminc) 500 KCalImind) 1000 KCallmin64. Equilibrium moisture curve is a plot betweena) Moisture content and relative humidityb) Temperature and relative humidityc) Moisture content add air temperatured) Moisture content and air velocity

57. The m ain purpose of blanching of vegetablesis tn 1 65. In convection drying of agricultural materials,," .-a) Destroy bacteriab) Destroy microorganism s

C) Inactivate enzvmesd j Accelerate eniym atic process

rate of drying can b e controlled bya) Air temperatureb) Air velocityc) Humidity1 d) Ail of the above

' PC,59. Convective heat transfer coeffic~en t isexpressed by the following dimensionlessnumbera) Prandtlb ) ~ r a k h o fc ) ~ u s i e i td) Reynold

58. Thermal diffusivity (m) an be expressed asa) UAAT

-(KA)b, (ATIAX)

60. Sorghum is ground from the average particlesize of 4 m m to 0.4 mm . Feed rate of the m illis 100 kglh and power requirement is 5 KW.The Rittinger's constant of the sorghum willbea) 0.022b) 11.11C) 13.88d) 22.22

66. A bin whose relative dimensions are suchthat the plane of rupture meets the grainsurface before it strikes the opposite side iscalleda) Pusa binb) Shallow binc) Vertical bind) Deep bin67.The major forces acting on a cyclonesepara tor area) impact and frictionalb) Gravity and centrifugalc) Frictional and centrifugald) Shear and impact68. Suitable moisture content for safe storage ofpaddy is In the range ofa) 4-6%b) 10-12%C) 1648%d) 22-24%


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Subject :PhD -Agricultural Engineering (AgriculturalProc2dsing ddS1iu?1urPs)2011 ' ' I ' 6

69. The indented cylinder separators separatesthe materials on the basis of one of thefollowing p roperties of materiala) Relative widthb) Relative thicknessC) Relative densityd) Relative length70. Supe rcritical fluid extraction technique Issuitable for extraction ofa) Essential oilb) Proteinc) Carbohydrated) Germ oil71. Cryogenics can be effectively used fora) Rice millingb) ' Oil millingC) Splce millingd) Pulse milling72. LS U dryer is basically aa) Co-current flow dryerb) Counter current Row dryerc) Cross flow batch dryerd) Through flow batch dryer73. Hea t sterilization is gene rally su itableprocess fora) Low acid foodb) High acid foodc) High protein foodd) High fat food74. Airy's theory is applicable design ofa) Cleanersb) Dryersc) Screw conveyorsd) Silo75. If bulk density of a material is given as 600kglm%nd true density as 1000 kglm3, itsporosity will bea) 20% . 2b) 40%c) 60%d) 66.66%76. ~ h beat transfer area of a single effectevaporator is given as 2 m2and overall heattransfer coefflcien t as 200 0 ~m"s.'c.'. Thetemperature difference across the evaporatoris 50%. The hea t transfer (q, KJls) in theevapo rator will bea) 20b) 200c) 500d) 2000

77. Psychrometric chart is a graphicalrepresentation ofa) Physical prope rtles of airb) Chemical properties of airC) ~he rmo dyn am ic roperties of aira) Physical prope rlles of water vapour78. Ball mills are generally used fora) Coarse grinding o f particlesb) Ultra flne grinding of particlesc) Med ium to fine grinding of particlesd) Coarse to ultra fine grinding of particles

179. Fire bricks are u$e d toa) Reflect heat1 b) Protect building against fire' c) Increase heat flowd) Decrease heat flow

80. Solid foods are gene rallya) Elasticb) Viscoplasticc) Viscoelasticd) Plastic81. Size reduction of grains is caused by impactina) Gyrato ry crushersb) Crush ing rollsc) Hamm er milld) Jaw crusher82. Herm etically sealed containers are essentialfora) Vacuum and pressure packagingb) Aseptic packagingc) .Flexible packagingd) Controlled atmosphere packaging83. For grain conveying through belt conveyors.the belt speed should be in the range ofa) 0.1 to 0.5 mlsb) 2 .5 to2.8mlsc) 10.5 to 15.0 mlsd) 20 to 25 mls84. The full form of HACCP In relation to foodprocessing sa) Haza rd Analysis Cen tral Con trol Pointb) Haza rd Aoricultural Comm oditv Con trol Pointc) H azard ~ n a l ~ s i sritical co ntr ol Pointd) Hazard Analysis for Critical Control ofProducts85. The boiling point of milk isa) 89.IDCb) 99.I0C


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Subject : PIID- Agricultural Engineering (Agricullrrr alProcessing& Slrucfures)- 2011 7

86. D-value (decimal reduction time) dependsupona) Temperatureb) Number of microorganisms initially present inthe productc) Heating timed) Death rate constant87. In modified atmosphere packaginga) CO2 and O2 e vels increaseb) C 0 2 evel increases and O2 evel decreasesc) CO2 level decrease s and O2 evel increasesd) C02 and O2 evels remain constant88. In which type of barn, the cows are housedand m ilked in the same buildinga) Loose housing barnb) Open air barnc) Stanchion barnd) None of the above89. Wax coating on fruits and vegetables is donetoa) Retard respirationb) Retard dehydrationc) Enhance appea ranced) All of the above90.As the difference between dry bulbtemperature and w et bulb temperature of airincreasesa) Relative humidity increasesb) Relative humidity decreasesc) No change in relative humidityd) Relative humid ity approa ches to zero91. The evaporative cooling system is very mucheffective for storage of fruits and vegetablesin the regions witha) High temperature and high relative humidityb) Low temp erature and low relative humidityc) Low temperature and high relative humidityd) High temperature and low relative humidity92. Central Institute of Post HaIVeSt Engineering&Technology (CIPHET) is situated ata) Bhopalb) New Delhid) Thaud!ianajaur93. Wet milling of maize is performed to producemainlya) Flourb) Semolinac) Starchd) Fine flour

94. The higher and lower temperature in arefrigerator working on reversed cycle are30C and 2OC. The capacity o f the m achineis 35 KW. Its coefficient of performance(COP) will bea) 9.82 ,

95. The process of Clewaxing in oils is performedtb removea) wax Ib) Organic impuritiesc) Moistured) All of the above96. Bio-gas contains mainlya) Carbon monoxideb) Ethylenec) Nitrogend) Methane

1 , i97 . A cylindrical silo of 3.0 m diameter and 20 min height is filled with wheat. The hydraulicradius of the silo will bea) 0.15m'b) 0.75 mc) 1.50 md) 60 m98. Soxhlet apparatus i s used fora) Liquid solid extractionb) Protein analysisc) Carbohydrate analysisd) Solid-gas extraction99. The chemical used to co ntrol rodents instorage godowns isa) Methyl bromideb) Zinc phosphideC) Phosphided) Ethyl bromide100. The unit operation not included in fhe Agro-processing sa) Drying and dehydrationb) Millingc) Harvesting and threshingd) Cleaning and grading101. Protein and oil content in percentages ofsoybea n area) 10 and 50b) 20and40c) 30 and 30d) 40 and 20


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Subject : hD -Agricultural Engineering (AgrlculturalProcessing & Structures) - 2011102. Foods are frozen by direct imm ersionmethod at a tempera ture of

103. The mo st effective evaporator type isa) Plateb) Rising filmc) Failing filmd) Shell and tube104. Most spoilage and pathogenic bacterlawhich contaminate food materiais havewater activity in the range ofa) 0.75-0.80b) ' 0.81-0.85C) 0.86-0.90d) 0.91-0.99105.A 5 kg block slides down a place inclined at30% to the hor izonta l. I f ~ ~ 0 . 2 ,tsacceleration isa) 0.98 mb) 3.2 mlsc) 4.9 m/s2d) 16mls2106.The part of a vapour compressionrefrigeration system, which absorbs heatfrom the refrigerated space isa) Compressorb) Evaporatorc) Condenserd) None of the above107. An equipotential line is the line o fa) Cons tant siopeb) Zero siopec) Constant pressured) Zero pressure108. The solvent used in oil extraction from ricebran isa) Ethyl alcoholb) Ammonia waterc) Methyl alcohold) H$lxane109. Rheology 1s the science ofa) Deform ation n the metalsb) Stress and strain b ehaviour of metalsc) Deformation and flow in the visco-elasticmaterialsd) Flow of viscous products110. Hvdroclones are u sed fora) ~\ iatermeasurementb) Hydroelectric power gene rationc) Separation of solids from liquidsd) Mixing of solids In water

111. Constituents of a mixture of w ater andsoybean oil could be easily separated bya) Filtrationb) Decantationc) Evaporationd) Fractionation112. Which ohe of the following thermometers isthe most sensitive?a) Bimetallicb) ResistanceC) Thermocoupled) Thermistor ,113. Percen t oil con tent of rice b ran fro mparboiled rice is abouta) 10-15 ,b) 15-20C) 20-25d) 25-30114. Porosity is a property thata) Changes as a result of change in colour andsurface of the productb) Changes as a result of chang e In shape andparticle densityc) Changes as a result of change in angle ofreposed) Remains constant115. Amongst the drying methodsa) Microwave drying results in highestshrlnkageb) Conventional air-drying develops lowest.shrinkageC) Freeze drying results in highest shrinkaged l Conventional air-drvina develops highest-shrinkage116. Parboiling is a hydrothermal process whichis done fora) Dena turation of proteinb) Removal of oil from rice branc) Gelatinization of starchd) Drying of paddy117 in wheat, endosperm material constitutesa) 10% of the weight of kernelb) 50 to 60 % of the weightc) 70 to 80 % of the welghtd) Above 80% of the we~ gh t118. Tofu is a product ofa) Riceb) WheatC) Sovbean


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Subject : hD -Agricultural Engineering (AgricullurnlProcessIng & Slruclnres)- 011 9119. Osmotic dehydration isa) Immersion of a produce in a diluted solutionof brine or sugarb) lmmerslon of a produce in a hypertonicsolutionc) Immersion of a produce in waterd) Heating of a produce for dehydration120. High carbon steels have carbon percentagein the range ofa) 0.1 - 0.4b) 0. 5- 1.5C) 2.0 - 3.0d) More than 3.0121. Post harvest losses in food grains are

, reported to bea) 3%-7%

122. The material with oscillating screen isseparated due to difference ina) Sizebj Shapec) Densityd) Surface properties123. More suitable conveyor for transportation ofsticky material isa) Apron conveyorb) Belt conveyorc) Screw conveyord) Pneumatic conveyor124.Which of the following temperaturemeasuring devices will have leastaccuracy?a) Clinical thermomete rb) Alcohol thermometerC) Optical Pyrometerd) Nitrogen filled thermometer125. ideal fluid isa) Whose density is zerob) Whose viscosity is z e pc) Whose conductivity is zerod) d,ho se velocity is zero126. In the concurren ffco-flow dryinga) Grain with m inimum moisture content m eetsthe air with highest drying potentialb) Grain with maximum moisture contentmeets the air with minilnum drying potentialc) Grain with maximum moisture contentmeets the air with m aximum drying potentiald) Grain moisture content does no t play a role

127. Critical molsture content is thea) Maximum moisture content that wili sustaina rate of fiow of free moisture to the surfaceof the grainb) Minimu m moisture content that will sustaina rate of fiow of free moisture to the surfaceof the grainc) Minimu m moisture content that wiliaccelerate the flow of free moistured) Maximum moisture content that wili sustainaccelerate the fiow of free moisture

128. The extent ,of attrition of particles in thefluidized bed drying isa) Proportiona l to cube of the air/gas velocityb) Prop,ortional to square of the air velocityc) Equal to thea ir velocityd) lnverselv ~ ro ~o r t io na lo air velocitv129. The recommended airflow rate for aeration

of grain in silos isa) 0.05 - 0.25 m3/min/tonneb) 0.05 - 0.75 m3/min/tonnec) 0.5 - 0.75 m3/min/tonned) 0.25 - 0.75 m3/min/tonne130. Ohmic heating is a process in whicha) Food liquids and solids are heatedseparatelyb) Food liquids and solids are heatedseparately but cooled togetherc) Food liquids and solids are heatedsimultaneouslyd) Has no relevance to food processingMatching type questions (No. 131 to 140) ;all questlons carry equal marks. Choosethe correct answer (a, b, c, d or e) foreach sub-question (i,i,iii,iv and v) andenter your choice in the circle (byshading with a pencil) on the OMR -answer sheet as per the instructionsgiven on the answer sheet.131.i) Wein's law a) Heat conductionii) New ton's law b) Relationship of

wavelength andtemperatureiii) Fourier's law c) Cooling of substanceiv) Kirchhoff's. law d) Damage of fruits andvegetablesv) Hertz contact stress theory e) Radiation132.i) Nusselt a) Heat engineii) Einstein b) Convectioniii) Stokes c) Viscous flowiv) Carnot d) Photoe iectricityV) Clausius e) Second law of thermo .ynamics


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Subject :PhD- Agricultural Engineering (Agrlculturnl Processing & Slrrrctures)- 011 10133. Match the following laws w ~ t h he relatedphenomenai) Maxwell's law a) ass' ransferii) Fick's law b) Fluid flowiii) Navier-Stokes' law c) Size reductiopiv) Schrodinger's equation d) Electro-magnetismv) Bond's law e) Unce rtainty princlple134. Match the following materials wi th the irmost appropriate therma l conductivity:values (WlmK)i) Mercury a) 0.556ii) Gold b) 0.024iii) Diamond c) 480iv) Water d) 8.21v) Air e) 2300135.i) Coiour sorter a) Tem peratureii) Relative hum idity b) Removal of rice braniil) Whiten ing c) Bond's lawiv) Thermocouple d) Optical propertiesV) Milllng of food grains e) Sling psychrometer136.i) Size reduction a) Majority of food spoilageii) High exit b) Storage of oilseeds attemperature high moistureiii) M icroorganism c) Low efficiency of drieriv) Rancidity d) Milling of grain bycrushingv) Aflatoxins e) Development of FFA

137.i) Cleaving a) Moisture equa lizationii). Grading , .b) Removal of m oistureiii) Drying c) Removal of fe w large particles. in the initial processiv) scalp ing d) Classification of cleaned

product into quality fractionv) Tempering e) Removal of foreign andundesirable matters138.i) Psychrometertii) Cyclone separatoriii) Inden t grain separatoriv) Electrosta tic separato rv) Hammer miil,.139.I) Slump testii) Plate loading testiii) Rheom eter testiv) Organo lyptic test

a) Size reduction deviceb) Grain sizec) Eiectrostatic orced) Re lative humiditye) Centrifuga l force

a) Calorific value of fuelb) Consistency ofconcrete mixc) Sensory evaluationd) Consistency of liquidfoodv) Bomb-calorimeter est e) Safe-bearing of soil

140.I) Enthalpy a) Kii) Entropy b) J/Kgill) Absolu te temperature c) JIKiv) Specific heat d) m2/sv) Therm al diffusivity e) J/Kg K


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Subject : hD - Agricultural Engineering (AgrlculturalProcesslng& Structures)- 011Short questions (No. 1 41 to 146); each question carries FIVE m arks. Wrlte answers,including computation 1 mathematical.calculat1ons if any, in the space provided Tgr, ,;,: , , . 8 feaoh question on 'the questlbti paper itself.

141. How knowledge of frictional properties is useful in design'of agricultural processing equipment andstorage structures?

142 Discuss briefly design of a screw conveyer for granular rnaterlais.


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Subject :PhD- Agricultur~lEngineering (Agricuft~~ralrocesslIIg& Struclures)- 011 , 12143. Discuss briefly static method for determination of Equilibrium Moisture Content (E MC).~,

~ ~

144. Differentiate between controlled atmosphere packaging (CAP) and modified atmospheric packaging(MAP) for frults and vegetables.


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Subject : PhD - Agricultural En gineering (AgrlculluralProcessing & Structures) - 01 1146. Discuss briefly the freeze drying technique .

146. The threshed wheat grain contains mustardlrapeseed as impurities. S uggest techniques to separateit from the whe at grain. Also, d escribe the prlnciple of cleaning device suitab le for this pu rpose.. .

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IARI PhD Entrance Question Paper 2011 - Agril Engg (Food Processing)

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