AGRICULTURAL ENGINEERING – 2002,PAPER – II

                      Time Allowed:    Three Hours     Maximum Marks: 200

SECTION B 

5.       Write short notes not exceeding 150 words each. On any four of the following :

(a)    Ball- mill

(b)   Septic Tank

(c)    Silage

(d)   Terminal Velocity

(e)   Modem

6.       (a)  Describe common methods of assembling electronic circuits with their merits and demerits.

(b) Describe the working principle, mounting and measuring procedure of a resistance type strain gauge.

(c)  Give the significance of the following (any two):

     (i) Churning of butter

     (ii) Sorting and grading of fruits and vegetables

     (iv)              Homogenization of milk

7.       (a)  Describe any four applications of Microprocessors and Computers in data acquisition and control of Agricultural Engineering Process.

(b)  Design a farm-house for a family of four members, include following features in the desing:

     (i) Floor-plan details

     (ii)  Safe drinking water supply system

     (iv)               Layout of a wastes disposal system

Assume all necessary data.

      (c) One ton cauliflower at 70 per cent moisture content is to be dried to a safe moisture content of 8 per cent. How much water is removed?

8.  (a) give the working principle of a green-house. Describe different uses of a green-house in Indian conditions.

     (b) Describe three most common parameters of a measuring system.

     (c) In a series A.C. circuit connection, an inductance of an 8 ohm and a resistor of 10 ohm are joined together. A current of 6 Amp. Flows in the circuit.

Calculate:-

    (i)                  The voltage across inductance , resistance & impedance

    (ii)                Phase angle between current and voltage.

AGRICULTURAL ENGINEERING – 2002,PAPER – II

                               Time Allowed:    Three Hours     Maximum Marks: 200

Candidates should attempt Questions 1 and 5 which are compulsory, and any THREE of the remaining questions, selecting at least ONE question from each Section.

Assume suitable data if considered necessary, and indicate the same clearly.

SECTION A

1.       Write short notes not exceeding 150 words each, on any four the following:

(a)    Paddy transplanter

(b)   Solar phot-  voltaic Panel

(c)    Smokeless Chulah

(d)   Transformer and Voltage Stabilizer

(e)   Prony-brake dynamometer

2.       (a)   With the help of the sketch, describe the most commonly used fuel supply system of a farm tractor. What improvements will you suggest to achieve a better performance ?

(b) Why power tillers coul nto be popularized  In India farming conditions?

(c) A farmer has purchased a 35 hp tractor for Rs. 2,50.000/- He wishes to use it for custom hiring with a 20% profit on its actual cost of operation .Assuming all reasonable  data, calculate the hourly charges for the tractor.

3.      (a) Describe the method of electricity transmission from the power house to the point of use. Give the major limitations in the rural power supply system and the ways to improve the same.

(b)  What are the precautions to be following during installation, operating & repair of an electric motor on the farm?

(c)  During a motor performance test, following measurements are recorded:

Voltage   = 220 volt;   Current= 12Amp.

Speed = 1440 rpm;   Torque = 12 N-m

Input Power = 2.1 k W.

Calculate the following:-

(i)                  Power factor

(ii)                Horse –power output

(iii)               Motor efficiency 

4.       (a) Describe the safety arrangements for the operator in the following farm- machines:

(i)                  Power thresher   

(ii)                Hand operated chaff cutter

(iii)               Sugarcane crusher

(b)  Describe different types of threshing mechanisms used in crop-threshers. Describe three most commonly used performance parameters of a power thresher.

(c) A 2.4 m wide disc-harrow at km/h speed is ploughing a field 10 cm deep. The measured draft is 450 kg. Calculate the specific draft & draw ber horse power of the implement.

AGRICULTURAL ENGINEERING – 2002,PAPER – I SECTION B

                           Time Allowed: Three Hours    Maximum Marks:  200

SECTION B

5.       Answer any four sub-parts not exceeding 150 words for each sub-part:

           (a)            (i) Mention five different methods to increase yield potential of an area where poor quality irrigation water is used.

                     (iii)               Determine the depth of irrigation water which would change 50 cm depth of loam soil into saline condition, if EC of irrigation water is 1 milliohms/ cm. The bulk density of soil is 1.3 gm/ cm³, the density of water is 1 gm/cm³ and saturation percentage of soil is 40.

           (b)     Explain modified Penman formula to calculate evapotranspiration rate.

           (c)      Calculate the most efficient bottom which for a drainage channel to carry a flow 2 m deep in clay soil. Compute the velocity and discharge capacity of the channel if the channel gradient is 0.05%. Permissible velocity in channel in clay soil is 1.2 m/sec and n= 0.035.

            (d)     What are the benefits of drainage? Mention five different types of land which require drainage.

            (e)     Differentiate between drilled wells and cavity tube wells.

6.       (a) Explain Hooghoudt’s equation with all assumptions and find out mathematical derivative for drain spacing.

     

                    (b)  Explain design considerations for a concrete grain bin.

                    (c) Name five points to be considered for selection of site or pumping tests.

7.       (a)  Discuss procedure to design an efficient border irrigation system.

                   (b) Mention effect of speed and impeller diameter on pump performance.

                    (c)   Write short notes on:

                           (i) Bag storage structure (ii)   Morai   (iii) Pen barn

8.       (a) A sprinkler irrigation system is to be designed to irrigate 10 hectares of vegetable crops in deep silt loam soil in moderate dry climate. The field is flat. Determine the limiting rate of application, the irrigation period, the net depth of water per application, the depth of water pumped for application and he required system capacity in hectare centimeters per day. Assume system operation 14 hours each day and determine pump capacity, limiting application rate is 1.3 cm/ hr, moisture holding capacity of soil may be taken as 9.5 cm/m depth/. The root zone depth is 60 cm; peak rate of moisture used by crop is 5 mm/day water application efficiency is 75%.

                    (b) Write short notes on:

                            (i) Soil wetness    (ii)    Soil consistency

                           (iii)  Saline and alkali soils    (IV) Pressure plate apparatus 

               (v)              Cavitation

AGRICULTURAL ENGINEERING – 2002,PAPER – I

                                Time Allowed: Three Hours    Maximum Marks:  200

Candidates should attempt Questions 1 and 5 which are compulsory, and any THREE of the remaining questions, selecting at least ONE question from each Section. Assume suitable data. If considered necessary, and indicate the same clearly. 

SECTION A 

1.       Answer any four sub-pars not exceeding 150 words for each sub-part:

      (a)     Design a 350 m long graded bund in sandy loam soil on a land having an average slope of 3 %. The bund channel is formed by embankment onle. The horizontal distance between two abject bunds is 70 m. The land is having cultivated crop. The bund channel is on a grade of 0.1% for the first 100 m, 0.2% for the next 100 m and 0.14% for the rest. Assume runoff coefficient 0.3 & rainfall intensity as 20 cm/ hr.

     (b)      Mention the use of air photo interpretation in agricultural application and forest conditions.

    (c)          Define farm pond. Show different types of ponds used in agriculture. Calculate capacity of a pond given the area enclosed by different contours at the site as follows:

Contour value (m)            Area enclosed (m²)

260                                             150

261                                             250

262                                             220

263                                             210

264                                             215

265                                             180

266                                             158       

    (d)      Determine the size of concrete pipe needed in a drop inlet spillway for a peak flow of 2 m³/ sec and total head of 4 m. determine the slope to be given to the pipe to flow full. Length of pipe is 14 m, entrance loss co-efficient K is 0.05 and friction loss co-efficient k is 0.04.

    (e)       Discuss methods for gully control.

2.                                (a) What is cropping system? Write its benefits agriculture.

                    (b)   What is the purpose to calculate land grading? List different methods of land grading.

                    (c) Classify the land use capability depending on slope, List soil conservation measures for each class of land.

                    (d)   How can soil losses be measured?

                    (e)    Explain damages caused by water erosion.

3.       (a)  Show components and write uses of a chute spill way. Describe its design features.

                    (b)  Design notch dimensions of a waste weir to discharge excess runoff from a contour bunded area on a land having an averages slope of 3%. Assume that the most severe rain occurring during the recurrence interval lasts for 3 hours. The rainfall intensities are such that 15 cm of rain occurs during the first hour 18 cm during second  hour and 16 cm during third hour. Infiltration and interception amount to 6 cm water during the first 30 minutes and 5 cm during the nexr 30 minutes. The infiltration then becomes constant at 8 cm/ hour. Calculate

 (i)                  Storage capacity of bund when water surface is at the crest level of the weir.

(ii)                Time required filling the bung up to the crest level of the waste weir. Assume horizontal spacing of bund = 60m, length of bund = 400 m, bund top width = 60 cm, bund height = 60 cm, side slope = 1.5:1 crest level of weir = 30 cm above ground level.

4.       (a) define the following terms:

             (i)                  Strip Cropping  

            (ii)                Types of terraces

            (iii)               Grassland Management

            (iv)              Effects of vegetation on soil erosion

            (v)                Waste weir types

                 (b) Explain about geologic and soil mapping.

                (c)  Differentiate between dry boulder spurs and permeable spurs.