Irrigation Engineering Set 16

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This set of Irrigation Engineering Multiple Choice Questions & Answers (MCQs) focuses on Irrigation Engineering Set 16

Q1 | The graphical representation of average rainfall and rainfall excess (i.e. rainfall minus infiltration) rates over specified areas during successive unit time intervals during a storm is known as
  • hydrograph
  • unit hydrograph
  • hyetograph
  • none of these
Q2 | The maximum depth in soil strata, in which the crop spreads its root system, and derives water from the soil, is called
  • kot depth
  • root zone depth
  • delta
  • overlap allowance
Q3 | In a canal section, which is in partial filling and partial cutting
  • the full supply level of the canal is above the natural surface level
  • the bed level of the canal is below the natural surface level
  • the full supply level of the canal is below the natural surface level
  • the bed level of the canal is above the natural surface level
Q4 | The free board in a channel is governed by the
  • size of the canal
  • location of the canal
  • water surface fluctuations
  • all of these
Q5 | According to Khosla's theory, the exit gradient in the absence of a downstream cut-off is
  • zero
  • unity
  • infinity
  • none of these
Q6 | Which of the following statement is wrong?
  • The impermeable groynes do not permit any flow through them.
  • The impermeable groynes may be constructed by a core of locally available material like sand, clay and gravel.
  • The permeable groynes dampen the velocity and reduce the erosive action of the stream.
  • none of the above
Q7 | Water logging takes place due to
  • rise
  • fall
Q8 | Outlet discharge for a particular crop is given by
  • Area / Outlet factor
  • Outlet factor / Area
  • Area x Outlet factor
  • none of these
Q9 | Which of the following statements is wrong?
  • Seepage drains reduce the chances of water logging.
  • The water table generally follows the ground surface above it with a few exceptions.
  • At the water table, the hydrostatic pressure is zero.
  • Water logging makes the land more productive.
Q10 | A groyne
  • contracts a river channel to improve its depth
  • silts up the area in the vicinity by creating a slack flow
  • trains the flow along a certain course
  • all of the above
Q11 | An aggrading river is a
  • scouring
  • silting
Q12 | The consumptive use of water of a crop
  • is measured as the volume of water per unit area
  • is measured as depth of water on irrigated area
  • may be supplied partly by precipitation and partly by irrigation
  • all of the above
Q13 | A deflecting groyne has a much
  • longer
  • shorter
Q14 | Which of the following method is useful for obtaining values of flood discharges for a high recurrence interval?
  • California method
  • Hazen's method
  • Gumbel's method
  • all of these
Q15 | The first watering, when the crop has grown a few centimetres, is called paleo.
  • Agree
  • Disagree
Q16 | A river training work is generally required when the river is
  • aggrading type
  • degrading type
  • meandering type
  • stable type
Q17 | The narrow strip of land left at the ground level between the inner toe of the bank and top edge of the cutting, is known as
  • free board
  • dowel
  • inspection roadway
  • berm
Q18 | Run-off is measured in
  • m3/s
  • m3/min
  • m3/h
  • none of these
Q19 | Irrigation is said to be a science of survival.
  • Correct
  • Incorrect
Q20 | According to Lacey
  • the silt is kept in suspension due to the force of vertical eddies
  • the eddies are generated from bed and sides, both normal to the surface of generation
  • the vertical component of eddies generated from sides will also support the silt
  • all of the above
Q21 | The height of dowel above the road level should not be more than
  • 10 cm
  • 20 cm
  • 30 cm
  • 40 cm