AGRICULTURAL ENGINEERING
Paper I
I Time Allowed Three Hours I !Maximum Marks: 200]
INSTRUCTIONS
Candidates should attempt Questions No. 1 and
5 which are compulsory, and any THREE of the
remaining questions, selecting at least ONE
quest.ion from each Section.
All questions carry equal marks.
Marks allotted to parts of a question are
indicated against each.
Answers must be written in ENGLISH only.
Assume suitable data, if necessary, and indicate
the same clearly.
Neat sketches may be drawn, wherever required.
SECTION A
1. Answer any four of the following, not exceeding
150 words for each
(a)Explain factors affecting erosion by water. 10
(b)Describe characteristics of the contour lines.
Explain the procedure to conduct topographical
survey of a watershed by direct contour method. 10
(c)Establish a relationship for width of bench
terrace in terms of land slope, vertical interval
and the riser inclination.
(d)Discuss the mechanics of wind erosion. 10
(e)Write plotting position method of frequency
analysis and its use in soil and water conservation engineering.10


2.(a)What is watershed Write major objectives of
watershed management programmes. What
available information would you like to collect
before conducting field survey in a watershed for
preparation of watershed plan
(b)Describe with the help of suitable diagrams three 10
types of earth embankments. 10
(c)Describe with proper illustrations different types
of drainage systems used in earth embankments. 10
(d)Discuss different phases of design procedure of
permanent soil conservation structures.
3.(a)What are the reasons for inconsistency in rainfall
record Explain the method of removing
inconsistency in rainfall data. 10
(b)Explain the different methods of determining the
average rainfall over a watershed due to a storm.
Discuss the relative merits and demerits of the
various methods. 10
(c)Define flood routing. Also describe the elements
of flood routing: 10
(d)Design a parabolic shaped grassed waterway
to carry a flow of 2.0m3/sec down a slope of 4·0%.
The maximum velocity of flow is 1·5 m/sec and
a freeboard of 10cm is recommended. Assume
n=0·04. 10
4.(a)Write the procedure to determine the priority
watersheds. 10
(b)List elements used in object recognition in photo
interpretations 10
(c)Enlist the techniques of air photo interpretation. 10
(d)Discuss merits and demerits of conventional and
remote sensing approach in watershed survey for
its development. 10

SECTION B
5. Answer any four of the following, not exceeding 150 words for each
(a)Discuss briefly about water conveyance, water
application, water storage, water distribution and
water use efficiency. 10
(b)Define drainage coefficient. Describe different
types of land requiring drainage. 10
(c)What are main types of canal linings? List
advantages of having lining of irrigation canals. 10
(d)Discuss different points to be considered for
selection of site of farmstead. 10
(e)Explain the Stream flow measurement by
area-velocity method.
6.(a)What is consumptive use Explain different
methods of consumptive use measurement. 10
(b)What do you understand by aeration of a weir
Explain. Discuss standard conditions that must
be observed for installing a weir. 10
undisturbed soil sample was taken with core
sampler from a field 36 hrs after irrigation when
the moisture was at field capacity. The core
sampler was 7·5cm in diameter and 15cm deep.
The weight of the sampler with moist soil was
2·52 kg and weight of oven dry soil was 2·34 kg.
The· weight of core sampler was 1·34 kg. What is
the available moisture holding capacity 10
tube-well is constructed in a confined aquifer.
The discharge of the tube-well is 28 lit/sec. The
thickness of the aquifer is 12·0m and drawdown
is 20.0 m. The coefficient of permeability of the
aquifer material is 12 m/day and the radius of
influence is 190m. Calculate diameter of the
well 10
7.(a)The following data were obtained in determining
the soil moisture content at successive depths in
the root zone prior to applying irrigation water
Depth of Wt. of moist Oven dry weight of
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The bulk density of the soil in the root zone
was 1·50 gm/cm3 . The available moisture holding
capacity of soil was 17·8 cm/m depth. Determine
(i)The moisture content at the different
depths in the root zone;
(ii)Moisture content in the root zone at the
time of irrigation.
(iii)Net depth of water to be applied to bring
moisture content to field capacity.
(iv)Gross irrigation requirement at estimated
field irrigation efficiency of 70 percent. 10
(b)How will you design a sprinkler irrigation system
for a farm Explain. 10
(c)Describe principal characteristics of a centrifugal pump. 10
(d)Differentiate between 10
(i)Water requirement and Irrigation
requirement
(ii)Crop water use efficiency and Field water
use efficiency
(iii)Evaporation and Consumptive use
(iv)Confined arid Unconfined aquifer
(v)Infiltration and Percolation

8.(a)A pump. directly driven with motor discharges
water at the rate of 600 lit per minute. Water
horsepower is 7. Pump efficiency is 60%.
Frictional losses in the system are 12% of static
head and the velocity head is of static head.
Motor efficiency is 80%. Determine
(i)Static head
(ii)Input horsepower to motor
(iii)Kilowatt input to motor

(b)How can you distinguish between sands with or
without organic matter Explain. 10
(c)What is slump test on concrete What is its
significance in building construction 10
(d)Write causes for development of salinity and
alkalinity in the soils. 10