Exam Details
| Subject | Irrigation Engineering | |
| Paper | ||
| Exam / Course | B.Tech. Civil (Construction Management) / (Water Resources Engineering)/ (Aero Space Engineering) BTCM-BTWRE | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 3
IET·533(A) I B.Tech. Civil <Water Resources Engineering) Term-End Examination 001..02 December, 2016
ET-533(A) IRRIGATION ENGINEERING
Time: 3 hours Maximum Marks: 70
Note: Attempt any five questions. All questions carry equal marks. Support your answers with examples and neat diagrams. Use of scientific calculator is permitted. Assume any data suitably, if not given.
1. Write brief notes (up to 100 words each) on the following: 7x2=14
Necessity for Irrigation
Drainage Water Disposal
Water Logging
Disadvantages of Drip Irrigation
Contour Benching
Classification of Pumps
Need for Land Grading
2. Explain how specific speed, as a characteristic parameter, is useful for both the centrifugal and turbine pumps. 7
Explain the role of pumps in Irrigation Engineering. 7
3. A wet sample of soil 1875 gm. was moulded into 1000 cm^3. The soil was dried in an oven reaching a constant mass of 1675 gm.. Its specific gravity may be taken as 2.67. Compute the following quantities: 14
Water content by weight, volume and mass
Dry unit weight of the soil
Porosity
Void ratio
Degree of saturation
Saturated unit weight
Air-filled porosity
4. Compare and contrast between drip irrigation and sprinkler system. Also draw their diagrams. 14
5. Express 1170 ppm sodium chloride (NaCl) salt concentration in terms of meq/l. 4
Write an explanatory note on irrigation water quality standards. 10
6. Explain the principles of working of a centrifugal pump. 10
Write down the difference in operating characteristics of centrifugal and reciprocating pumps. 4
7. Explain the four-comer method for the calculation of cut and fill volumes. 14
8. Name the various types of water application methods and explain anyone of them in detail. 7
A 300 m long sprinkler lateral discharge is 500 l/minute. The spacing between the laterals is 15 m. Determine the average application rate of sprinkler laterals. 7
IET·533(A) I B.Tech. Civil <Water Resources Engineering) Term-End Examination 001..02 December, 2016
ET-533(A) IRRIGATION ENGINEERING
Time: 3 hours Maximum Marks: 70
Note: Attempt any five questions. All questions carry equal marks. Support your answers with examples and neat diagrams. Use of scientific calculator is permitted. Assume any data suitably, if not given.
1. Write brief notes (up to 100 words each) on the following: 7x2=14
Necessity for Irrigation
Drainage Water Disposal
Water Logging
Disadvantages of Drip Irrigation
Contour Benching
Classification of Pumps
Need for Land Grading
2. Explain how specific speed, as a characteristic parameter, is useful for both the centrifugal and turbine pumps. 7
Explain the role of pumps in Irrigation Engineering. 7
3. A wet sample of soil 1875 gm. was moulded into 1000 cm^3. The soil was dried in an oven reaching a constant mass of 1675 gm.. Its specific gravity may be taken as 2.67. Compute the following quantities: 14
Water content by weight, volume and mass
Dry unit weight of the soil
Porosity
Void ratio
Degree of saturation
Saturated unit weight
Air-filled porosity
4. Compare and contrast between drip irrigation and sprinkler system. Also draw their diagrams. 14
5. Express 1170 ppm sodium chloride (NaCl) salt concentration in terms of meq/l. 4
Write an explanatory note on irrigation water quality standards. 10
6. Explain the principles of working of a centrifugal pump. 10
Write down the difference in operating characteristics of centrifugal and reciprocating pumps. 4
7. Explain the four-comer method for the calculation of cut and fill volumes. 14
8. Name the various types of water application methods and explain anyone of them in detail. 7
A 300 m long sprinkler lateral discharge is 500 l/minute. The spacing between the laterals is 15 m. Determine the average application rate of sprinkler laterals. 7
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