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GATE AG 2024: Agricultural Engineering

  • Date: 10 February 2024
  • Paper code: AG
  • Language: English
  • 25 pages
GATE AG 2024 question paper, GATE 2024, Agricultural Engineering, page 1 of 25
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Agricultural Engineering (AG)


General Aptitude (GA)
Q.1 – Q.5 Carry ONE mark Each

 Q.1      If ‘→’ denotes increasing order of intensity, then the meaning of the words

          [dry → arid → parched] is analogous to [diet → fast → ________ ].

          Which one of the given options is appropriate to fill the blank?




 (A)      starve


 (B)      reject


 (C)      feast


 (D)      deny




 Q.2      If two distinct non-zero real variables x and y are such that (x + y) is proportional
                                         x
          to (x − y) then the value of
                                        y




 (A)      depends on xy


 (B)      depends only on x and not on y


 (C)      depends only on y and not on x


 (D)      is a constant




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Agricultural Engineering (AG)



 Q.3      Consider the following sample of numbers:

                                       9, 18, 11, 14, 15, 17, 10, 69, 11, 13

          The median of the sample is




 (A)      13.5


 (B)      14


 (C)      11


 (D)      18.7




 Q.4      The number of coins of ₹1, ₹5, and ₹10 denominations that a person has are in the
          ratio 5:3:13. Of the total amount, the percentage of money in ₹5 coins is




 (A)      21%


 (B)           2
          14 7%


 (C)      10%


 (D)      30%




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Agricultural Engineering (AG)



 Q.5      For positive non-zero real variables p and q, if

                                 log (p2 + q 2 ) = log p + log q + 2 log 3 ,

                               p4 +q4
          then, the value of              is
                                p2 q 2




 (A)      79


 (B)      81


 (C)      9


 (D)      83



Q.6 – Q.10 Carry TWO marks Each

 Q.6      In the given text, the blanks are numbered (i)−(iv). Select the best match for all the
          blanks.

                                                             (i)                       (ii)
          Steve was advised to keep his head                         before heading           to bat;
                                               (iii)
          for, while he had a head                      batting, he could only do so with a cool head
                  (iv)
          s              his shoulders.




 (A)          (i) down      (ii) down            (iii) on          (iv) for


 (B)          (i) on        (ii) down            (iii) for         (iv) on


 (C)          (i) down      (ii) out             (iii) for         (iv) on


 (D)          (i) on        (ii) out             (iii) on          (iv) for


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Agricultural Engineering (AG)



 Q.7      A rectangular paper sheet of dimensions 54 cm × 4 cm is taken. The two longer
          edges of the sheet are joined together to create a cylindrical tube. A cube whose
          surface area is equal to the area of the sheet is also taken.

          Then, the ratio of the volume of the cylindrical tube to the volume of the cube is




 (A)      1/π


 (B)      2/π


 (C)      3/π


 (D)      4/π




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Agricultural Engineering (AG)



 Q.8      The pie chart presents the percentage contribution of different macronutrients to a
          typical 2,000 kcal diet of a person.

                                 Macronutrient energy contribution

                                                   Trans
                                                    fat
                                                    5%
                                   Saturated fat
                                       20%                    Carbohydrates
                                                                  35%



                                   Unsaturated fat
                                        20%
                                                           Proteins
                                                             20%




          The typical energy density (kcal/g) of these macronutrients is given in the table.

                        Macronutrient                           Energy density (kcal/g)
                        Carbohydrates                                     4
                        Proteins                                          4
                        Unsaturated fat                                   9
                        Saturated fat                                     9
                        Trans fat                                         9

          The total fat (all three types), in grams, this person consumes is




 (A)      44.4


 (B)      77.8


 (C)      100


 (D)      3,600




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 Q.9      A rectangular paper of 20 cm × 8 cm is folded 3 times. Each fold is made along the
          line of symmetry, which is perpendicular to its long edge. The perimeter of the final
          folded sheet (in cm) is




 (A)      18


 (B)      24


 (C)      20


 (D)      21




 Q.10     The least number of squares to be added in the figure to make AB a line of
          symmetry is




 (A)      6


 (B)      4


 (C)      5


 (D)      7




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Q.11 – Q.35 Carry ONE mark Each



 Q.11     The divergence of the curl of a twice continuously differentiable vector function is
          __________.


 (A)      0


 (B)      1


 (C)      2


 (D)      ∞




 Q.12     Laplace transform of a function f(t) = t4 as a function of ‘s’ is __________.


 (A)      120
           s5

 (B)      24
          s5

 (C)      120
           s4

 (D)      24
          s4




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 Q.13     If the dynamic weight on the front axle is lesser than 20% of the total weight of
          tractor, the longitudinal instability of tractor can be avoided by __________.


 (A)      adding weight on the rear axle


 (B)      adding weight on the front axle


 (C)      reducing weight on the rear axle


 (D)      reducing weight on the front axle




 Q.14     In places with severe cold climate, the most important fuel property to be considered
          for running an internal combustion engine is __________.


 (A)      heating value


 (B)      flash point


 (C)      pour point


 (D)      boiling point




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 Q.15     A towed rigid wheel with a total weight W is to be rolled on a hard horizontal surface
          as well as up the slope on a hard surface inclined at an angle θ with the horizontal.
          The rolling resistance of the wheel on inclined surface as compared to that on the
          horizontal surface is __________.


 (A)      increased by Wsinθ


 (B)      increased by Wcosθ


 (C)      decreased by Wsinθ


 (D)      decreased by Wcosθ




 Q.16     The difference between advance curve and recession curve for a given surface
          irrigation event is known as __________.


 (A)      time of concentration


 (B)      lag time


 (C)      time to peak


 (D)      intake opportunity time




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 Q.17     Match the following instruments (in Column I) with corresponding measurements
          (in Column II).




                      Column I                                 Column II


             P     Current meter              1    Solar radiation


             Q     Anemometer                 2    Rainfall


             R     Hygrometer                 3    Stream flow velocity


             S     Symon’s gauge              4    Humidity


             T     Pyranometer                5    Wind speed




 (A)      P-3, Q-5, R-4, S-2, T-1


 (B)      P-2, Q-3, R-5, S-1, T-4


 (C)      P-1, Q-2, R-3, S-4, T-5


 (D)      P-5, Q-4, R-1, S-3, T-2




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 Q.18     In wind erosion, the maximum portion of soil is transported by the process of
          __________.


 (A)      suspension


 (B)      saltation


 (C)      surface creep


 (D)      bed load




 Q.19     Hilly areas receiving heavy rainfall, where a major portion of the rainfall is to be
          drained as surface runoff, are suggested to adopt bench terraces with __________.


 (A)      sloping inward


 (B)      level tops


 (C)      sloping outward


 (D)      narrow width




 Q.20     Critical thickness of insulation (rcr) for a pipe having thermal conductivity (k) and
          convective heat transfer coefficient (ho) is __________.


 (A)      2k/ho


 (B)      k/ho


 (C)      ho/k


 (D)      2ho/k


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 Q.21     A continuously differentiable function y = f(x) satisfies one or more of the following
          conditions at its point of inflection:


 (A)      d2 y
               ≠0
          dx2

 (B)      d2 y
               =0
          dx2

 (C)      d3 y
               =0
          dx3

 (D)      d3 y
               ≠0
          dx3




 Q.22     In-situ volumetric soil moisture content measuring method(s) is/are:


 (A)      Neutron probe


 (B)      Tensiometer


 (C)      Time domain reflectometry


 (D)      Piezometer




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 Q.23     Incorrect statement(s) with respect to hydrothermal treatment of paddy is/are:


 (A)      Process imparts hard texture to grain


 (B)      Retention of Vitamin B is less


 (C)      Cooking to the same degree of softness requires less time


 (D)      Bran obtained contains higher oil content




 Q.24     Falling rate period of drying can be explained by one/more of the following:


 (A)      Capillary rise of water


 (B)      Molecular diffusion of water


 (C)      Surface cooling


 (D)      Surface evaporation




 Q.25     The mean and variance of a dataset are 16 and 25, respectively. The coefficient of
          variation of the dataset, in %, is __________. (Rounded off to 2 decimal places)




 Q.26     The chances for passing an endurance test for three threshers P, Q and R are 1/6,
          1/4, and 1/2, respectively. The probability of passing the endurance test by at least
          one thresher, in fraction, is __________. (Rounded off to 2 decimal places)




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 Q.27     The height of adult males at 5th, 50th and 95th percentiles are 162 cm, 173 cm and
          185 cm, respectively. The minimum inside height of the tractor cab required to
          ensure the satisfactory design based on the given data, in cm, is __________.
          (Answer in integer)




 Q.28     A chain drive is used to transmit power from a DC motor to the shaft of a solar
          energy operated thresher by reducing the speed from 240 rpm to 120 rpm. The
          number of teeth on the driving sprocket is 20 and the pitch circle diameter of the
          driven sprocket is 600 mm. The pitch of the chain used, in mm, is __________.
          (Rounded off to 2 decimal places)




 Q.29     A tractor drawn rotavator with a rotor radius 300 mm has 6 flanges having 3 blades
          in each flange acting in one plane. It is operated at a rotor speed of 180 rpm and a
          forward speed of 3 km.h-1. Increasing the forward speed as well as the rotor speed
          by 15% each, the change in length of soil slice, in mm, is __________. (Answer in
          integer)




 Q.30     The air standard cycle efficiency of the Otto cycle is 56% and heat supplied is
          12.5 kJ, the heat rejected during the cycle, in kJ, is __________. (Rounded off to 2
          decimal places)




 Q.31     The slope length of an area having land slope of 6% is reduced to half while other
          conditions are kept unchanged. The reduction in annual soil loss from the area,
          in %, is __________. (Rounded off to 2 decimal places)




 Q.32     The excess water from a watershed of area 16.95 km2 is drained out through a
          channel at an average rate of 2.8 m3.s-1. Drainage coefficient of the watershed,
          in cm, is __________. (Rounded off to 2 decimal places)




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 Q.33     Freshly harvested shrimps of 100 kg having initial temperature of 25 °C are frozen
          to −18 °C. The specific heat (cp) of shrimp above and below freezing point (0 °C)
          are 3.64 kJ.kg-1.°C-1 and 2.01 kJ.kg-1.°C-1, respectively. Considering the latent heat
          of fusion as 240 kJ.kg-1, the heat load removed during the process, in kJ, is
          __________. (Rounded off to 1 decimal place)




 Q.34     An indented cylinder type rice grader has been fed with milled rice containing 18 %
          brokens. After separation, head rice stream contains 3 % brokens and the broken
          stream carried away 4 % head rice. The effectiveness of the given rice grader on the
          basis of head rice separation, in fraction, is __________. (Rounded off to 3 decimal
          places)




 Q.35     A single effect evaporator concentrates 9090 kg.h-1 herbal extract of 12 % solids
          entering at 300 K to a final solid concentration of 20 %. Assuming negligible product
          loss through vapor, the amount of concentrated product, in kg, is __________.
          (Answer in integer)




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Q.36 – Q.65 Carry TWO marks Each

 Q.36 [P] = [ 2 3 7 ] and [Q] = [ 8         11    9
                                                    ] are two matrices. The matrix [P]T [Q]
              4 1 5              12          6   13
      is __________.


 (A)       64        36   116
         [ 46        39   107 ]
           70        40   128

 (B)       64          46     70
         [ 36          39     40 ]
          116         107    128

 (C)         112     113
         [               ]
              88      89

 (D)         112     88
         [              ]
             113     89




 Q.37                                                       d2 y    dy
         The complete solution for the differential equation dx2 + 2 dx − 3y = 0 for y(0) = 0
                dy
         and dx (0) = 8 is __________.


 (A)     2(ex − e3x )


 (B)     2(ex − e−3x )


 (C)     2(ex + e3x )


 (D)     2(ex + e−3x )




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 Q.38 A power operated chaff cutter has an effective throat width of 450 mm and operating
      clearance of 150 mm. It is used for chopping straw at a moisture content of 20 % with
      bulk density of 60 kg.m-3 while passing through the feed rolls. The number of knives
      on the cutter head are 4, speed of the cutter head is 540 rpm and the theoretical length
      of cut is 10 mm. The theoretical capacity of the chaff cutter, in ton.h-1, is _________.
      (Rounded off to 2 decimal places)


 (A)     1.31


 (B)     5.25


 (C)     7.54


 (D)     9.61




 Q.39 A 4.2 m self-propelled combine harvester operating at a forward speed of
      3.5 km.h-1 is used to harvest wheat in an area of 300 ha in a year at a field efficiency
      of 75 %. Consider the variable cost to be linearly related to the actual hours of
      operation. To bring down the cost of operation per hour by 15 %, the change in area
      required to be harvested per year, in ha, is __________. (Rounded off to 2 decimal
      places)


 (A)     52.94


 (B)     53.74


 (C)     55.80


 (D)     57.65




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 Q.40 A 3-cylinder 4-stroke diesel engine with a bore 73 mm and stroke 78 mm is tested at
      2200 rpm. When a braking torque 55 N.m is applied, the indicated mean effective
      pressure is found to be 1050 kPa. The mechanical efficiency of the engine, in %, is
      __________. (Rounded off to 2 decimal places)


 (A)     57.21


 (B)     61.45


 (C)     67.21


 (D)     71.25




 Q.41 The performance of a border irrigation event was evaluated by taking soil moisture
      measurements at 12 locations along the border from the upstream end. The computed
      irrigation depths at those locations were 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, and
      39 mm. The Christiansen Uniformity Coefficient (CU) for the event, in %, is
      __________. (Rounded off to 2 decimal places)


 (A)     93.26


 (B)     91.66


 (C)     89.70


 (D)     36.28




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 Q.42 A 10 ha watershed received a 4-hour rainfall storm with rainfall intensity of 2, 1, 1.5,
      and 1 cm.h-1 in each subsequent hour, respectively. Assuming phi-index (ϕ) of
      1 cm.h-1, the volume of direct runoff, in m3, is __________. (Rounded off to 2 decimal
      places)


 (A)     1500


 (B)     4500


 (C)     5500


 (D)     15000




 Q.43 A surveyor started a longitudinal section leveling survey by taking starting bench
      mark of elevation 53.85 m. During the survey, he takes an observation of intermediate
      sight of 2.42 m with the staff held on another bench mark of 85.45 m. The sum of the
      back sights from the start to the point is 50.28 m and that of fore sight is 16.30 m. If
      the surveyor ends the survey operation on the second bench mark, the error of closure
      on the second bench mark, in m, is __________. (Rounded off to 2 decimal places)


 (A)     0.02


 (B)     0.04


 (C)     0.06


 (D)     0.08




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 Q.44 The decimal reduction time D121 and the z value of thermophilic spores in milk were
      found to be 60 seconds and 11 °C, respectively. Heating time required at
      141 °C for a 10 log cycle reduction in population, in seconds, is __________.
      (Rounded off to 2 decimal places)


 (A)     0.28


 (B)     0.91


 (C)     2.81


 (D)     9.12




 Q.45 Match the following in material types (Column I) with their rheological properties
      (Column II).
                    Column I                                Column II
          P. Bingham plastic           1. Viscosity increases with increase in shear rate
          Q. Dilatant                  2. Finite yield stress
          R. Pseudoplastic             3. Shear rate proportional to shear stress
          S. Newtonian                 4. Viscosity decreases with increase in shear rate



 (A)     P-1, Q-2, R-4, S-3


 (B)     P-2, Q-1, R-4, S-3


 (C)     P-2, Q-4, R-1, S-3


 (D)     P-4, Q-3, R-2, S-1




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 Q.46 Match the following types of mill in Column I based on their grinding mechanisms
      in Column II.
                           Column I                                    Column II
          P. Attrition mill                            1. Compression and shear
          Q. Ball mill                                 2. Impact and abrasion
          R. Hammer mill                               3. Crushing and shear
          S. Roller mill                               4. Impact and shear




 (A)     P-3; Q-2; R-4; S-1


 (B)     P-2; Q-3; R-4; S-1


 (C)     P-3; Q-1; R-4; S-2


 (D)     P-3; Q-4; R-1; S-2




 Q.47 The calculated value of e2x using Taylor’s series with first four terms for x = 1 is
                                                                                      2
      __________. (Rounded off to 3 decimal places)




 Q.48 The directional derivative of u(x, y, z) = x2 y + y2 z at the point (1, 2, 3) in the direction
      ̂i +2 ĵ + 3 k̂ is __________. (Rounded off to 2 decimal places)




 Q.49 A single acting disk harrow having 5 disks in each gang with a gang angle of 20º is
      operated at a forward speed of 3 km.h-1 and a depth of 10 cm. The horizontal soil
      reaction force acting parallel to the face of each disk is found to be 250 N. The
      drawbar power required to pull the harrow, in kW, is __________. (Rounded off to 2
      decimal places)



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 Q.50 A tractor drawn rotary mower has a swath width 1.2 m when operated at a forward
      speed of 5 km.h-1. The specific power loss due to air, stubble and gear train friction
      per m of swath width is 1.5 kW and the specific cutting energy is 2 kJ.m-2. The total
      weight of tractor with mower is 25 kN and the resistance to propel the tractor with
      mower is 6 % of its total weight. Assuming transmission efficiency between engine
      to drawbar as 75 % and engine to PTO as 87 %, the total engine power required to
      carry out mowing, in kW, is __________. (Rounded off to 2 decimal places)




 Q.51 A farmer desires to run a diesel engine developing a brake power of 1.5 kW,
      continuously for 2 hours using biogas and diesel in a dual fuel mode. If gas
      requirement for running the engine in dual fuel mode is 0.67 m3.kW-1.h-1, the
      minimum size of KVIC model biogas plant with a gas holding capacity of 60 %
      suitable for running this diesel engine, in m3, is __________. (Answer in integer)




 Q.52 An accelerator mounted to the waist of a seated tractor operator records an RMS
      acceleration of 2.5 m.s-2. By improving the seat design, the vibration acceleration
      level is decreased by 5 dB. After improvement, the RMS acceleration, in m.s-2, is
      __________. (Rounded off to 3 decimal places)




 Q.53 A two-wheel drive tractor having a total weight of 20 kN is pulling an implement at
      an actual speed of 3 km.h-1. The ratio of axle power (kW) to dynamic weight (kN) on
      the rear axle is expressed as 1.79/V, where, V is the theoretical forward speed in
      km.h-1. During pulling the implement, the weight distribution on the front and rear
      axles of the tractor is 40 % and 60 % of the total weight, respectively, with wheel slip
      12 % and coefficient of net traction 0.42. The tractive efficiency, in %, is
      __________. (Rounded off to 2 decimal places)




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 Q.54 A tractor drawn boom type sprayer fitted with 12 nozzles at a spacing of 50 cm is
      used to carryout spraying at a forward speed of 3.5 km.h-1 and nozzle pressure of
      250 kPa for an application rate of 1.5 m3.ha-1. Out of the total discharge from the
      pump, 12 % is bypassed to the liquid tank and the total pressure drop in all pipe lines
      from the pump is 10 % of the pressure developed by the pump. Considering the pump
      efficiency as 60 %, if the nozzle pressure is increased by 10 %, the power required to
      operate the pump, in kW, is __________. (Rounded off to 3 decimal places)




 Q.55 A flow rate of 2 m3.s-1 is to be carried out in an open channel at a velocity of 1 m.s-1.
      The cross section of the channel is rectangular with depth equal to one-half of the
      width. Considering Manning’s roughness coefficient (n) as 0.02, the slope of the
      channel, in %, is __________. (Rounded off to 2 decimal places)




 Q.56 A catchment with 5 rain gauge stations recorded annual rainfall of 90, 100, 80, 120,
      and 110 cm, respectively. Considering 5 % error in estimation of the mean annual
      rainfall, additional number of rain gauge stations required is __________. (Answer in
      integer)




 Q.57 A soil sample of diameter 70 mm was used for constant head permeability test. The
      observed head loss was 80 mm in the soil sample length of 100 mm and water
      collected in one minute was 60 mL. The coefficient of permeability, in mm.s-1, is
      __________. (Rounded off to 2 decimal places)




 Q.58 In an area, one tubewell of 15 cm diameter was operating such that groundwater table
      is 40 m above the bottom of screen. The groundwater formation has permeability (K)
      as 20 m.d-1 and well has radius of influence of 980 m with a maximum drawdown of
      12 m. After some time, a second tubewell of same size was installed at a distance of
      500 m from the first tubewell. If both the tubewells are running simultaneously and
      have equal discharge, the loss of discharge in the first tubewell due to installation of
      the second tubewell, in %, is __________. (Rounded off to 2 decimal places)




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 Q.59 In a semi-arid region with land slope of 3 %, contour bunding is planned to conserve
      and store the rain water. In 10 years return period, the daily effective rainfall is
      estimated as 20 cm maximum in the region. If the horizontal spacing between the
      bunds is 30 m, the designed height of the bund, in m, is __________. (Rounded off to
      2 decimal places)




 Q.60 A single acting reciprocating pump, running at 40 rpm, has piston of 20 cm diameter
      and stroke length of 40 cm. The suction and delivery heads are 5 m and 20 m,
      respectively. Assuming overall pump efficiency as 80 %, the power requirement of
      the pump, in kW, is __________. (Rounded off to 2 decimal places)




 Q.61 A steam jacketed kettle is filled with a 250 kg liquid food with a specific heat of
      3.1 kJ.kg-1.K-1. Steam used at 121 °C has a heat transfer coefficient of 2 kW.m-2.K-1.
      The area of heat transfer is 0.15 m2. Using lumped capacity method, the time required
      to heat the product from 30 °C to 95 °C, in minutes, is __________. (Rounded off to
      2 decimal places)




 Q.62 Fruit juice entering at 30 °C is being pasteurized in a double pipe counter flow heat
      exchanger using hot water entering at 97 °C and leaving at 65 °C. Specific heat of
      juice and water are 3.8 kJ.kg-1.K-1 and 4.2 kJ.kg-1.K-1, respectively. Flow rate of juice
      is 0.3 kg.s-1 and that of water is 0.4 kg.s-1. Considering an overall heat transfer
      coefficient of 1 kW.m-2.K-1, the area of heat exchanger required, in m2, is
      __________. (Rounded off to 3 decimal places)




 Q.63 Mango pulp at an initial temperature of 25 °C and a moisture content of 70 % (wb) is
      to be dried into leather to a final moisture content of 10 % (wb) using hot air at
      95 °C. The latent heat of vaporization of water at 95 °C and at standard atmospheric
      pressure is 2250 kJ.kg-1. Considering the specific heat of mango pulp as
      3.8 kJ.kg-1.°C-1, the energy required for drying per kg of mango pulp, in kJ, is
      __________. (Rounded off to 1 decimal place)




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Agricultural Engineering (AG)



 Q.64 Sorghum flour obtained from a grinder was analyzed by IS sieves for particle size
      determination. The data obtained are as follows:

          IS sieve number         100    70       50       40       30       20      PAN

          Mass of flour            0    10.1     16.5     36.2     82.8     95.0      9.4
          retained (g)

         The average particle size of the flour, in mm, is __________. (Rounded off to 3
         decimal places)




 Q.65 Fish fillets at −1 °C are being frozen in Individual Quick Freezing (IQF) system using
      air at −40 °C. The product has a characteristic dimension of 10 cm with a density of
      1200 kg.m-3. Thermal conductivity of the product is 2.5 W.m-2.K-1, the convective
      heat transfer coefficient is 100 W.m-2.K-1 and the latent heat of fusion is 300 kJ.kg-1.
      If the fillet is considered as an infinite plate, the freezing time, in minutes, is
      __________. (Rounded off to 2 decimal places)




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Source: GATE. Question paper published by GATE.