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Free download in PDF Irrigation Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
In a chute spillway, the flow is usually
[A]
super critical
[B]
critical
[C]
uniform
[D]
subcritical
(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
(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
(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)
(5)
The discharge passing over an ogee spillway is given by
[A]
CLH1/2
[B]
CLH3/2
[C]
CHL3/2
[D]
CLH5/2
(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
(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
(11)
Sub-irrigation is used in areas with:
[A]
High water table
[B]
Flat terrain
[C]
Low water table
[D]
Sloping terrain
(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
(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
(16)
Optimum depth of kor watering for rice is
[A]
190 mm
[B]
215 mm
[C]
135 mm
[D]
165 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
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