Irrigation Engineering Set 1

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This set of Irrigation Engineering Multiple Choice Questions & Answers (MCQs) focuses on Irrigation Engineering Set 1

Q1 | Which of the following methods of applying water may be used on rolling land ?
  • boarder flooding
  • check flooding
  • furrow flooding
  • free flooding
Q2 | The value of Sodium Absorption Ratio for high sodium water lies between
  • 0 to 10
  • 10 to 18
  • 18 to 26
  • 26 to 34
Q3 | Optimum depth of kor watering for rice is
  • 135 mm
  • 165 mm
  • 190 mm
  • 215 mm
Q4 | Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milliequivalent per litre respectively will be classified as
  • low sodium water
  • medium sodium water
  • high sodium water
  • very high sodium water
Q5 | The duty is largest
  • at the head of water course
  • on the field
  • at the head of a main canal
  • same at all places
Q6 | The "outlet discharge factor" is the duty at the head of
  • main canal
  • branch canal
  • watercourse
  • distributory
Q7 | The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be
  • 637 hectares/m3/sec
  • 837 hectares/m3/sec
  • 972 hectares/m3/sec
  • 1172 hectares/m3/sec
Q8 | For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for acapacity equal to the greater of the water requirement of
  • rabi or kharif
  • rabi and kharif or sugarcane
  • rabi and sugarcane or kharif and sugarcane
  • rabi or kharif or sugarcane
Q9 | The ratio of the quantity of water stored in the root zone of the crops to the quantity of wateractually delivered in the field is known as
  • water conveyance efficiency
  • water application efficiency
  • water use efficiency
  • none of the above
Q10 | The water utilizable by plants is available in soils mainly in the form of
  • gravity water
  • capillary water
  • hydroscopic water
  • chemical water
Q11 | The amount of irrigation water required to meet the evapotranspiration needs of the cropduring its full growth is called
  • effective rainfall
  • consumptive use
  • consumptive irrigation requirement
  • net irrigation requirement
Q12 | With the increase in the quantity of water supplied, the yield of most crops
  • increases continuously
  • decreases continuously
  • increases upto a certain limit and then becomes constant
  • increases upto a certain limit and then decreases
Q13 | Hydrograph is the graphical representation of
  • runoff and time
  • surface runoff and time
  • ground waterflow and time
  • rainfall and time
Q14 | Infiltration rate is always
  • more than the infiltration capacity
  • less than the infiltration capacity
  • equal to or less than the infiltration capacity
  • equal to or more than the infiltration capacity
Q15 | The depth of water required to bring the soil moisture content of a given soil upto its fieldcapacity is called
  • hygroscopic water
  • equivalent moisture
  • soil moisture deficiency
  • pellicular water
Q16 | Infiltration capacity
  • is a constant factor
  • changes with time
  • changes with location
  • changes with both time and location
Q17 | Infiltration is the
  • movement of water through the soil
  • absorption of water by soil surface
  • both (a) and (b)
  • none of the above
Q18 | If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltrationrate will be
  • equal to rate of rainfall
  • equal to infiltration capacity
  • more than rate of rainfall
  • more than infiltration capacity
Q19 | Cyclonic precipitation is caused by lifting of an air mass due to
  • pressure difference
  • temperature difference
  • natural topographical barriers
  • all of the above
Q20 | Which of the following is a non-recording raingauge ?
  • tipping bucket type raingauge
  • Simon's raingauge
  • Steven's weighing type raingauge
  • floating type raingauge
Q21 | A raingauge should preferably be fixed
  • near the building
  • under the tree
  • in an open space
  • in a closed space
Q22 | Which of the following types of rain gauges is used for measuring rain in remote hillyinaccessible areas ?
  • tipping bucket type
  • weighing type
  • floating type
  • Simon's raingauge
Q23 | Rate of evaporation from a water surface increases ifi) difference of vapour pressure between water and air is increasedii) velocity of wind is decreasediii) concentration of soluble solids in water is decreased The correct answer is
  • (i) and (ii)
  • (i) and (iii)
  • (ii) and (iii)
  • (i). (ii) and (iii)
Q24 | A 70% index of wetness means
  • rain excess of 30%
  • rain deficiency of 30%
  • rain deficiency of 70%
  • none of the above
Q25 | Under the same conditions, which of the following shapes of water surface will give thehighest rate of evaporation ?
  • flat water surface
  • convex water surface
  • concave water surface
  • independent of shape of water surface