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ARUNACHAL PRADESH PUBLIC SERVICE COMMISSION, 2004
SUBJECT AGRICULTURE ENGINEERING
Total Marks: 200 Time: 3 Hours INSTRUCTIONS:
1.
This paper contains Section A and Section B.

2.
Attempt any IVE questions from Each Section.

3.
All questions carry Equal Marks.

4.
Make reasonable assumptions wherever necessary and state them clearly.

5.
Please answer in brief, to the point.

6.
Use of calculator is allowed.

7.
Graph paper will be supplied if needed.

8.
The figures in the margin indicate full marks of the questions.


SECTION
Answer any five questions from Section

1. Write short notes on any five of the following:
a.
Types of Water Erosion f. Measurement of Depth of Water

b.
Hydrologic Cycle Table

c.
Rainfall-Runoff Relations g. Wind Erosion

d.
Flood Routing h. Erosion Control Measures

e.
Duty of Water i. Stream Bank Erosion


j. Bench Terracing
2. State Trapezoidal formula and Prismoidal formula and explain the use of one.
A farmer gr. wi a wheat crop having a rootzone depth of 60cm ana sandy soil with an specific gravity of 1.62, permanent wilting point of 5 percent and field capacity of 32 percent would like to irrigate the crop when the soil moisture level reaches 50 per cent deficiency as detected by taking a soil sample. The 100 g sample of moist soil, on oven drying, yielded 84.380 g of oven-dry soil. Does the farmer need to start irrigation? And, if needed, how many centimeters gf water need be applied?
An irregular cross sectioned stream of 35 m width is divided into 7 sections each of 5 m width. The depths of water at the end of each of the six successive sections, respectively, are recorded as 2.0m, 3.5m, 4.0m, 3.8m, 3.6m and 2.8m. The average velocities applicable to the respective sections have been determined as 0.32, 0.38, 0.41, 0.45, 0.43, 0.39 and 0.30 m/s. Calculate the total discharge of the stream and the average velocity of the stream.
3. Explain with the help of neatly drawn sketches how the discharge of a tubewell is measured.
An irrigation engineer when asked to design an earthen channel of 2.1 cumecs capacity en a bed slope of 1 in 3,500, side slopes of the channel Chezy's constant, C 60 designed a channel with 200 cm bottom width and 80 cm depth of flow. Check up the correctness of the design.
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A compact block of 500 m x 500 m is divided into 25 plots each of 1 ha area is
supposed to be irrigated by a deep tube well. Making reasonable assumptions regarding the soil, crop etc. describe how you will find the discharge of the tube well which will be able to command the given area.
4. Explain, in brief, the Investigations and Planning of either one of the following
River Valley Project Minor Irrigation Project

Describe the method of constructing a Tube Well.


What is Well Development? How is it performed?


5. Define drainage coefficient? How is it determined?

List the methods used for surface drainage of flat lands(ii) sloping lands, and

ponded areas and describe anyone with neatly drawn diagrams.


Explain the detailed procedure of designing an open ditch.


6. Write short notes on any four of the following:
Farmstead Planning Mlndigenous Grain Storage Structures
Deep Litter Poultry House Plan of Face-out System of Dairy Barn
Pit Privy Rural Water Supply Balanced Section
(viii) Design of Truss.
Design the floor plan of residence for a farmer given the following:
Unit cost of construction per square meter of area Rs.2,000
ii) The amount which the farmer would like to spend Rs. 2,00,000
iii) Suggested dimensio(1s of rooms:

Bedroom: 3.6m x 3.0m; Drawing room: 4.5m x 3.6m Kitchen: 2.5m x 4.0m; Store: 3.0m x 1.8m; Bathroom: 2m x 3.0m; Study room: 3m x 2.5m;
Note: You are free to assume any alternative dimensions to facilitate the design.
7. Calculate the quantities of materials required to make 10 cubic meters of
1 5 10 cement concrete for laying out in the foundation of a farm building.
On one side of the slanting roof of a small shed, 28 G.C.I. sheets, each of
dimensions 1.0m x 1.8m are used in two rows of 14 sheets. Assuming 10%
overlap in both length and breadth calculate the area of one side of the slanting


Explain the detailed proceciui of designing any ONE of the following:
R.C.C.
Lintel for the Doorway in a Milk Room;

R.C.C.
Roof Slab for a Grain Store;
Composite Beam of Timber and Mild Steel;
Long Mild Steel Column; Foundation for a Grain Silo.



SECTION Answer any five questions from Section
8. Write short notes on any five of the following: Universal joint ii) Determination of centre of gravity 6f" atractor iii) Field capacity of a sprayer ivY . Puddling

Chaff-cutter

vi) Bund-former
vii) Power tiller for self-employment
viii) Blade harrow
ix) Anhydrous Ammonia Applicator
Use of Bulldozer in land reclamation

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9. What is the importance of farm mechanization in India?

Distinguish between Primary Tillage and Secondary Tillage and describe the working of one implement of each.


List the three most important farm machines used on Indian farms and write down their specifications.


10. With the help of neatly drawn sketches distinguish between the following:[2x5=10] a Moldboard Plough and a Disk Plough ii) Registration and Alignment of a Mower Cutter Bar.
A driving gear having 10 teeth is rotated with a constant speed of 100 r.p.m., while the number of teeth on the additional gear is 20, is 5 and final driven gear is 30. Gears and are mounted on the same shaft. Calculate the speeds of gears and
11. Distinguish between Otto cycle and Diesel cycle.
Explain the working of any two of the following: carburetor ii) spark plug iii) fly wheel iv) compression ignition engine radiator
12. How many kilometers are to be traveled in ploughing 1 ha of land using 3-bottom 35cm wide moldboard plough, given field efficiency is 90%

Name two plant protection equipment and write down the specifications of any one.


A Massey Fergusson 1035 diesel tractor has a three cylinder four stroke engine, in which the cylinder bore 88.9 mm, stroke=127 mm, compression ratio=16.5: belt horse power=32 h.p. and engine speed 2,000 r.p.m. Calculate Piston displacement Displacement volume, Piston speed and Stroke bore ratto. 12]


13. Write short notes on any two of the following: importance of rural electrification ii) equivalent resistance iii) transmission and distribution of power IV) induction motor Star-Delta starter.
A farmer owning a 100 ha apple orchard pumps water from a deep tube well to a overhead reservoir using a deep well-turbine pump operated by an electric motor. Listing reasonable assumptions, write down the steps of calculating the monthly electric bill.
14. List different types of electric motors used on Indian agricultural farms and explain the constructional features of one of them.
Distinguish between A.C. Circuits and D.C. Circuits and mention their specific use on Indian Farms.