Irrigation Quiz | Irrigation Multiple Choice Questions and Answers

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Questions
1 In a chute spillway, the flow is usually
A super critical
B critical
C uniform
D subcritical

Answer: super critical
2 In case of non-availability of space due to topography, the most suitable spillway is
A shaft spillway
B ogee spillway
C chute spillway
D straight drop spillway

Answer: shaft spillway
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3 Which of the following spillways is least suitable for an earthen dam ?
A shaft spillway
B ogee spillway
C chute spillway
D side channel spillway

Answer: ogee spillway
4 Coefficient of discharge of an ogee spillway
A depends on depth of approach and upstream slope
B depends on downstream apron interference and downstream submergence
C remains constant
D both (a) and (b)

Answer: both (a) and (b)
5 The discharge passing over an ogee spillway is given by
A CLH1/2
B CLH3/2
C CHL3/2
D CLH5/2

Answer: CLH3/2
6 The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are
A parallel to weir crest in both
B at right angle and parallel to weir crest
C at right angle to weir crest in both
D parallel and at right angle to weir crest

Answer: at right angle and parallel to weir crest
7 Seepage through foundation in an earthen dam is controlled by providing
A impervious cut off
B chimney drain
C rock toe
D horizontal blanket

Answer: impervious cut off
8 Seepage through embankments in an earthen dam is controlled by
A drain trenches
B provision of downstream berms
C drainage filters
D relief wells

Answer: drain trenches
9 _________ is a form of overhead irrigation.
A Drip irrigation
B Sprinkler irrigation
C Centre Pivot irrigation
D Terraced irrigation

Answer: Centre Pivot irrigation
10 Tank water irrigation system is common in:
A Himachal Pradesh
B Andhra Pradesh
C Madhya Pradesh
D Assam

Answer: Andhra Pradesh
11 Sub-irrigation is used in areas with:
A High water table
B Flat terrain
C Low water table
D Sloping terrain

Answer: High water table
12 The field water efficiency is determined by:
A Water absorbed by crop – water applied to a field
B (Water transpired by crop ÷ water applied to a field) x 100%
C Water transpired by crop – water applied to a field
D (Water absorbed by crop ÷ water applied to a field) x 100%

Answer: (Water transpired by crop ÷ water applied to a field) x 100%
13 Micro-irrigation is also called:
A Localized irrigation
B Flood irrigation
C Nano-irrigation
D Petite irrigation

Answer: Localized irrigation
14 Tube wells are not used in:
A Rajasthan
B Gujarat
C UP
D Haryana

Answer: Rajasthan
15 Which of the following methods of applying water may be used on rolling land ?
A free flooding
B boarder flooding
C check flooding
D furrow flooding

Answer: boarder flooding
16 Optimum depth of kor watering for rice is
A 190 mm
B 215 mm
C 135 mm
D 165 mm

Answer: 190 mm
17 Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as
A medium sodium water
B very high sodium water
C low sodium water
D high sodium water

Answer: medium sodium water
18 The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be
A 1172 hectares/m3/sec
B 837 hectares/m3/sec
C 637 hectares/m3/sec
D 972 hectares/m3/sec

Answer: 637 hectares/m3/sec
19 The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as
A water application efficiency
B water use efficiency
C water conveyance efficiency
D none of the above

Answer: water application efficiency
20 The water utilizable by plants is available in soils mainly in the form of
A capillary water
B chemical water
C gravity water
D hydroscopic water

Answer: capillary water

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