Exam Details
| Subject | Irrigation Engineering | |
| Paper | ||
| Exam / Course | Diploma in Civil Engineering (DCLE - G) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Select the most appropriate answer from the given options.
South-west monsoon contributes about rainfall in India.
72%
74%
76%
78%
Formula for calculating discharge from a Cipoletti weir is
0.0138
0.0186 LH^3/2
0.0138
0.0184 LH^3/2
Which of the following is not a method of canal lining
Concrete
Shot concrete
RCC
Brick
Which of the following is not a hydraulic structure?
Distributary head regulator
Escapes
Cross regulators
Grass waterways
Which one of the following is not a component of fertigation system?
Venturi pump
V-notch
Pressure by-pass tank
Injection pump
Unit of delta is
cm
ha
cumec
cusec
The salinity of water for irrigation purpose is measured by
SAR value
pH value
Electrical conductivity
None of the above
If the water applied to a field penetrates uniformly throughout, then the deviation from the mean depth is
Zero
1·0
0·5
1·5
The confined aquifer is also known as
artificial aquifer
gravity aquifer
Both and
None of the above
The structural efficiency of a gravity dam is that of an arch dam.
more than
less than
equal to
not comparable with
The maximum flood discharge given by Ryves formula is Q where n is
1/2
3/4
2/3
4/3
The Symon's rain gauge is
recording type
non-recording type
automatic
continuous
Base period is the duration between presowing irrigation to
crop maturity
crop harvesting
crop germination
last watering
Lacey's formula is
f=0·76 sqrt(m)
1·76 sqrt(m)
1·67 sqrt(m)
1·86 sqrt(m)
Differentiate between the functioning of recording and non-recording rain gauges.
Distinguish between surface and sub-surface irrigation.
3. Find out the capacity of the reservoir, if its culturable area is 65,000 ha, from the following data:
Sr. No. Type of crop Sugarcane Wheat Rice
1. B in days 330 120 120
2. D in ha/cumec 2200 1800 800
3. Intensity of irrigation 15% 20% 10%
Describe in detail with a neat sketch the Direct Irrigation method.
Enumerate the various types of linings. Explain the construction of cement concrete lining.
What are the different types of concrete dams? Explain anyone of them with a neat sketch.
Differentiate between trough and barrel type aqueducts with sketches.
Define aquifer, aquitard, aquiclude and aquifuge.
Calculate the discharge from an unconfined well of 0·20 m diameter, if the drawdown inside the well is 3 m and the saturated thickness of the aquifer is 12 m. The permeability of the aquifer is 1·2 m/h and the radius of influence is 600 metres.
Discuss the factors affecting the selection of irrigation system.
Furrows 90 m long and spaced 75 em apart are irrigated by an initial furrow stream of two litres per second. The initial furrow stream reached the lower end of the field in 50 minutes. The size of the stream was then reduced to 0·5litres per second. The cut back stream continued for 1 hr. Estimate the average depth of irrigation.
8. Discuss the effects and causes of water logging. What are the remedial measures of water logging?
South-west monsoon contributes about rainfall in India.
72%
74%
76%
78%
Formula for calculating discharge from a Cipoletti weir is
0.0138
0.0186 LH^3/2
0.0138
0.0184 LH^3/2
Which of the following is not a method of canal lining
Concrete
Shot concrete
RCC
Brick
Which of the following is not a hydraulic structure?
Distributary head regulator
Escapes
Cross regulators
Grass waterways
Which one of the following is not a component of fertigation system?
Venturi pump
V-notch
Pressure by-pass tank
Injection pump
Unit of delta is
cm
ha
cumec
cusec
The salinity of water for irrigation purpose is measured by
SAR value
pH value
Electrical conductivity
None of the above
If the water applied to a field penetrates uniformly throughout, then the deviation from the mean depth is
Zero
1·0
0·5
1·5
The confined aquifer is also known as
artificial aquifer
gravity aquifer
Both and
None of the above
The structural efficiency of a gravity dam is that of an arch dam.
more than
less than
equal to
not comparable with
The maximum flood discharge given by Ryves formula is Q where n is
1/2
3/4
2/3
4/3
The Symon's rain gauge is
recording type
non-recording type
automatic
continuous
Base period is the duration between presowing irrigation to
crop maturity
crop harvesting
crop germination
last watering
Lacey's formula is
f=0·76 sqrt(m)
1·76 sqrt(m)
1·67 sqrt(m)
1·86 sqrt(m)
Differentiate between the functioning of recording and non-recording rain gauges.
Distinguish between surface and sub-surface irrigation.
3. Find out the capacity of the reservoir, if its culturable area is 65,000 ha, from the following data:
Sr. No. Type of crop Sugarcane Wheat Rice
1. B in days 330 120 120
2. D in ha/cumec 2200 1800 800
3. Intensity of irrigation 15% 20% 10%
Describe in detail with a neat sketch the Direct Irrigation method.
Enumerate the various types of linings. Explain the construction of cement concrete lining.
What are the different types of concrete dams? Explain anyone of them with a neat sketch.
Differentiate between trough and barrel type aqueducts with sketches.
Define aquifer, aquitard, aquiclude and aquifuge.
Calculate the discharge from an unconfined well of 0·20 m diameter, if the drawdown inside the well is 3 m and the saturated thickness of the aquifer is 12 m. The permeability of the aquifer is 1·2 m/h and the radius of influence is 600 metres.
Discuss the factors affecting the selection of irrigation system.
Furrows 90 m long and spaced 75 em apart are irrigated by an initial furrow stream of two litres per second. The initial furrow stream reached the lower end of the field in 50 minutes. The size of the stream was then reduced to 0·5litres per second. The cut back stream continued for 1 hr. Estimate the average depth of irrigation.
8. Discuss the effects and causes of water logging. What are the remedial measures of water logging?
Other Question Papers
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Subjects
- Construction Equipment
- Construction Management
- Construction Supervision and Building Maintenance
- Irrigation Engineering
- Prestressed Concrete
- Soil Mechanics and Foundation Engineering
- Technical Documentation
- Transportation Engineering