Full Text Transcript
Text below was recognized via OCR from scanned pages and may contain minor errors. Mathematical formulas and symbols may be approximate - please refer to the PDF for the exact equations.
INDIAN FOREST SERVICE (MAINJEXAM- 2023 7 سی
AGRICULTURAL ENGINEERING
PAPER—I
Time Allowed : Three Hours Maximum Marks : 200
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully
before attempting questions
There are EIGHT questions in all, out of which FIVE are to be attempted.
Question Nos. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be
attempted selecting at least ONE question from each of the two Sections A and B.
Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a
question shall be counted even if attempted partly. Any page or portion of the page left blank
in the Question-cum-Answer Booklet must be clearly struck off.
All questions carry equal marks. The number of marks carried by a question/part is indicated
against it.
Answers must be written in ENGLISH only.
Unless otherwise mentioned, symbols and notations have their usual standard meanings.
Assume suitable data, if necessary, and indicate the same clearly.
Neat sketches may be drawn, wherever required.
BJKE-U-AGRE/40 1 [ P.T.O.
(0)
(©
(0)
(૭
2. (a)
(0)
(0
(0)
SECTION—A
Discuss in brief ‘wattling—an erosion control measure’.
Explain the different processes involved in the development of gullies.
Discuss the purpose, advantages and limitations of percolation tank.
Explain the process of ‘restoration’ and ‘geometric correction’ in digital image
processing.
(0 What is false colour composite?
(1) Define atmospheric windows in relation to remote sensing.
Discuss about the widely used in situ water conservation practices for
non-arable land with their suitability and limitation.
Determine the peak rate of runoff for a 10-year frequency from a watershed of
250 hectares, having weighted value of runoff coefficient (৫) as 0:47. The
distance from the remotest point in the watershed to the outlet is 3000 m and
the elevation difference between the highest and outlet points of the watershed
is 25m. The maximum intensity-duration-frequency relationship of the
watershed is given by
مر رو
,=
०948 )0-50+ 7(
where i=intensity in cm/h, T=return period in years and D = ৭৮:৪001 of
rainfall in hours.
Derive the expression for area lost in percentage for cultivation due to
construction of bench terrace under the following conditions :
(i) Batter slope 1:1
(i) Batter slope डर : 1
Explain the terms ‘erodibility index’ and ‘roughness factor’ used for prediction
of wind erosion.
Design a grass waterway with trapezoidal cross-section for the following data :
( Peak rate of runoff, Q=4-0 m°/s
(1) Grade to be used = 0 .3%
(11) Manning’s roughness coefficient = 0-04
(iv) Side slope, 2 = 2 : 1 (1 : ४)
Assume other necessary data.
BJKE-U-AGRE/40 2
10
10
20
10
15
(6)
(৮)
©
(৮)
(0
(0)
(e)
(৮)
(0
Determine the height of wing wall of a drop structure if the—
() net drop from the top of transverse sill to the crest (7) = 2.50 m;
(1) head over the crest (7) =1-50m;
(iii) height of transverse sill (5) = 0.50 m. 15
What are the basic keys of image interpretation? Also enlist the sequences
followed in the process of image interpretation. 10
How is classification done in digital image processing? 10
What do you understand by watershed prioritization? How can you prioritize
the watershed for treatment from soil erosion and sediment yield point of view
using remote sensing and GIS techniques? 20
SECTION—B
Develop the relationship among delta, base period and duty of water. 8
Distinguish between reservoir storage efficiency and water storage efficiency. 8
What are the limitations in the adoptability of check basin method? 8
Design a bag storage structure for storing 300 tonnes of wheat with a stack of
10 bags in length, 10 bags in width and 10 bags in height. Each bag is of
100 cm x60 cm x30 cm dimension having capacity of 100 kg. Take a clear
distance between the walls and the end of the stack as 0:8 m and between the
stacks as 2:0 m. Give the complete floor plan of the structure with dimension
and draw layout. 8
Classify various types of greenhouse and briefly discuss each of them. 8
An area of 25 hectares is to be irrigated by a pump working for 10 hours a day.
The available moisture-holding capacity of the soil is 16 cm/m and the depth of
root zone is 1 m. Irrigation is to be done when 50 percent of the available
moisture in the root zone is depleted. The water application efficiency is
75 percent. The peak rate of moisture used by the crops is 5 mm/day (weighted
average). The losses in water conveyance are negligible. Determine the
irrigation period, net depth of water application, depth of water pumped per
application, and the required capacity of irrigation system in hectare-cm/day
and litres per second. 20
What is cavitation? How does it affect the performance of pumping system? 10
Discuss in detail about the hydraulic design of open drains. 10
BJKE-U-AGRE/40 3 2270
7. (a) How do air vents and end plugs protect the underground pipeline from
damage? 10
(b) What are the parameters to be considered in designing of tube wells? Explain. 10
(જ ¢ Compute the velocity of flow of water to be drained and discharge capacity
of 150 mm diameter corrugated plastic pipe flowing full if the slope is
0:4 percent. Manning’s roughness coefficient is 0-016. 10
(1) How will you reclaim and manage the saline soils? Explain. 10
8. (a) Discuss various factors to be taken care in designing a storage structure for
grains. What measures can be adopted to improve the performance of
traditional storage structure? 10
(b) How are bricks (the common building material) prepared in India? Classify
bricks and briefly discuss about each type of brick. 10
(c) Discuss how you plan to construct a new dairy barn. Discuss various dairy
barn equipments. Compare between stall barn and loose housing barn. 20
× × ×
BJKE-U-AGRE/40 4 SB24—252
