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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