Irrigation Quiz | Irrigation Short Questions and Answers

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Questions
41 A multipurpose reservoir is the one which is
A designed for one purpose but serves more than one purpose
B planned and constructed to serve various purposes
C both (a) and (b)
D none of the above

Answer: planned and constructed to serve various purposes
42 A deep well
A is always deeper than a shallow well
B has more discharge than a shallow well
C is weaker structurally than a shallow well
D both (a) and (b)

Answer: has more discharge than a shallow well
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43 An artesian aquifer is the one where
A water surface under the ground is at atmospheric pressure
B water is under pressure between two impervious strata
C water table serves as upper surface of zone of saturation
D none of the above

Answer: water is under pressure between two impervious strata
44 If d is the depth of the aquifer through which water is flowing, then the relationship between permeability k and transmissible T is given by
A T = kd
B k= VTd
C T= Vkd
D T = k/d

Answer: T = kd
45 Dimensions of coefficient of transmissibility are
A M°L°T°
B rvfL’T”1
C M° L2 T1
D M’LV

Answer: M° L2 T1
46 -hydrograph is used to obtain unit hydrograph of
A shorter duration from longer duration
B longer duration from shorter duration
C both (a) and (b)
D none of the above

Answer: both (a) and (b)
47 The unit hydrograph of a specified duration can be used to evaluate the hydrograph of storms of
A same and longer duration
B any duration
C same duration only
D same and shorter duration

Answer: any duration
48 The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by
A direct runoff volume
B total rainfall
C period of storm
D none of the above

Answer: direct runoff volume
49 The best unit duration of storm for a unit hydrograph is
A 1 hour
B one-fourth of basin lag
C one-half of basin lag
D equal to basin lag

Answer: one-fourth of basin lag
50 A current meter is used to measure the
A velocity of flow of water
B depth of flow of water
C discharge
D none of the above

Answer: velocity of flow of water
51 The runoff increases with
A increase in intensity of rain
B increase in infiltration capacity
C increase in permeability of soil
D all of the above

Answer: increase in intensity of rain
52 When surface of transpiration is submerged under water, then potential evapotranspiration is
A much more than evapotranspiration
B much less than evapotranspiration
C equal to evapotranspiration
D equal to or less than evapotranspi-ration

Answer: much more than evapotranspiration
53 Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?
A flat water surface
B convex water surface
C concave water surface
D independent of shape of water surface

Answer: convex water surface
54 A 70% index of wetness means
A rain excess of 30%
B rain deficiency of 30%
C rain deficiency of 70%
D none of the above

Answer: rain deficiency of 30%
55 Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?
A floating type
B tipping bucket type
C weighing type
D Simon’s raingauge

Answer: tipping bucket type
56 Which of the following is a non-recording raingauge ?
A tipping bucket type raingauge
B Simon’s raingauge
C Steven’s weighing type raingauge
D floating type raingauge

Answer: Simon’s raingauge
57 Infiltration is the
A movement of water through the soil
B absorption of water by soil surface
C both (a) and (b)
D none of the above

Answer: movement of water through the soil
58 Infiltration capacity
A changes with both time and location
B changes with location
C changes with time
D is a constant factor

Answer: changes with both time and location
59 The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called
A soil moisture deficiency
B pellicular water
C hygroscopic water
D equivalent moisture

Answer: soil moisture deficiency
60 Infiltration rate is always
A equal to or less than the infiltration capacity
B equal to or more than the infiltration capacity
C more than the infiltration capacity
D less than the infiltration capacity

Answer: equal to or less than the infiltration capacity

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