IFS Agricultural Engineering Papers 2005
IFS Agricultural Engineering 2005
Paper-I
Section A

1. Answer the following questions

a. On a 20% hill slope, it is proposed to construct terraces. If the vertical interval is 2 calculate

i. length per hectare

ii. volume of earth work

iii. area lost both for vertical cut and for batter slope of 1. 1.1 The cut should be equal to fill

b. Write short notes on:

i. Contour trenching.

ii. Stone terracing

c. Explain mechanics of wind erosion and mention the factors influencing it

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

a. What is meant by run-off? How is it produced? Discuss various factors on which it depends

b. At the beginning of a certain week, the depth of water in an evaporation pan of 1.2 m diameter was 7.75 cm. During the week, the rainfall was 3.8 cm and 2.5 cm of water was removed from the pan to keep the depth of water in it within a fixed range. At the end of the week, the gauge indicated a depth of 8.32 cm of water in the pan. Using pan coefficient as estimate the evaporation during the week from the surface of a reservoir under similar atmospheric conditions

c. Design the notch dimensions of a wooden slab dam to carry a peak flow of 0.8 cum/sec. The notch has rectangular opening. Width of gully channel is 2.8 m. Assume necessary data

d. What are the basic components of permanent soil conservation structures and explain their functions in brief

e. Classify various sources of sediment in reservoirs and write down three main types of bed load samplings commonly used for estimating sediment flow rates

3. Answer the following questions

a. What is the Universal Soil Loss Equation. Explain in detail the various elements involved in the equation. Explain in brief the factor affecting the soil loss.

b. What are various criteria to be considered before proposing a project on watershed management

c. Write short notes on-Farm pond, Process of gully development, Spurs

4. Answer the following questions

a. What do you mean by aerial photography and how it can be used in watershed management programme

b. List out 10 main functions of command area development projects

c. Define the following terms:

i. Rain gauge.
ii. Time of concentration.

iii. Antecedent moisture condition.

iv. Runoff hydrograph.

Plane method

Section B

1. Answer the following questions

a. Write down few conditions where sprinkler can be used advantageously. Specify its advantages over surface irrigation methods and also list out its limitations

b. Write short notes on:

i. Silos

ii. Bukhari

iii. Surkhi

iv. Curing

v. Finishing

vi Morai

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

a. Answer the following questions

i. A wall penetrating into an unconfined aquifer having a saturated thickness of 100 meters. The discharge is 250 lit/mm at 12m draw down. Assuming equilibrium flow conditions and a homogeneous aquifer, estimate discharge at 18th draw down. The distance from the well where the draw down influences is not appreciable may be taken to be equal for both the cases.

ii. Define following terms: Semi-confined, Perched aquifer Unconfined aquifer 3 10).

b. Explain different types of irrigation efficiencies used to evaluate irrigation water management practices

c. Answer the following questions

i. In a tile drainage system used for an irrigated area, tile drains of 0.2 m dia, are to be used. The depth for the drains is 2 m below the soil surface. Hydraulic conductivity of the soil is 1 m/day (uniform). The area is irrigated once in 15 days and it is estimated that the losses are 30 mm in 15 days so that the average discharge of the drainage system is 2 mm/day. Calculate the required drain spacing if the water table is to be kept at 1.5 m from the ground surface (take S 80 m for d 4 m and equivalent depth 3.55

ii. What are the benefits of dub-surface drainage in agricultural lands

d. Discuss briefly the design principles involved in the design of a strainer type of a tube-well

e. Answer the following questions

i. What are the source of water supply to farmsteads? Mention the criteria to be considered while designing a storage tank.

ii. Determine size of an overhead water tank for a farmstead demanding a maximum of about 40, 000 lit. Of water per hour for 3 hours during noon and only about 30, 000 lit. Per hr. During rest of the period. The tube well is capable of supplying at the rate of only 25, 000 lit/hr 6 10).

3.Answer the following questions

a.Eight grams of sodium chloride has been dissolved in 4 lit, of water. Express the salt concentration in ppm, in ohms, millimhos, micromhos/cm and m eq/It.

b. What are the methods recommended for reclamation of alkali and saline soils

c. Explain various causes of water logging and mention approaches to solve the drainage problems of a location

d. Write short notes on:

i. Drainage Coefficient.

ii. Exchangeable sodium

4. Answer the following questions

a.Describe the principle of operation of centrifugal pumps and list out few common troubles while operating the pumps

b. Differentiate between:

i. Shallow tubewell and deep tubewell.

ii. Infiltration and percolation.

iii. Specific storage and storability.

iv. Hydraulic conductivity and intrinsic permeability.

Aquiclude and aquitard

Paper-II