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Irrigation Engineering Test 3
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  • Question 1/6
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    If the channel index and outlet index are considered as 1.5 and 0.5 then the outlet can be classified as:
  • Question 2/6
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    In an irrigation field, a farmer suspects that due to salinity his crops are not growing properly. Which of the following methods he should employ to measure the salinity?
  • Question 3/6
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    Consider the following two statements in connection with spillways.

    Statement A: When the designed head of an ogee spillway is greater than the operating head, then cavitation will occur.

    Statement B: A Siphon spillway is a spillway that discharges the surplus water over the crest of a dam or weir by utilizing the siphonic action.

    Which of these statements is correct?

  • Question 4/6
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    Electrical conductivity (EC) value of a saturated extract of soil is 13 m.mho/cm. Leaching requirement and depth of the water to be applied in the field is 7.5% and 5.94 mm. The value of consumptive use is ______mm.

  • Question 5/6
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    A high gravity dam is to be constructed on a soil having a frictional coefficient of 0.68 with the dam surfaces. Theoretical analysis shows that the total downward force is 54500 kN and the net horizontal force in the downstream direction is 32000 kN. If the width of the dam at the joints is 45 m then what should be the average shear strength of the joint (in kN/m2 corrected up to two decimal points) to achieve the required shear friction factor of 4.0?

  • Question 6/6
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    In a canal module, the water discharges through a weir type outlet and flows into a wide trapezoidal distributary channel. For the channel, flow can be considered to be proportional with \({{\rm{y}}^{5/3}}\) where y is the water depth in the trapezoidal channel. If the flexibility of the module is 1.15, what should be the head acting on the outlet (in m correct up to two decimal points) to maintain a water depth of 3.5 m in the channel?
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