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This set of Irrigation Engineering Multiple Choice Questions & Answers (MCQs) focuses on Irrigation Engineering Set 4
Q1 | As compared to crest of the normal portion of the weir, the crest of the under sluice portionof weir is kept at
- lower level
- higher level
- same level
- any of the above depending on the design
Q2 | Silt excluders are constructed on the
- river bed upstream of head regulator
- river bed downstream of head regulator
- canal bed upstream of head regulator
- canal bed downstream of head regulator
Q3 | According to Khosla's theory, the exit gradient in the absence of a downstream cutoff is
- 0
- unity
- infinity
- very large
Q4 | The minimum size of stone that will remain at rest in a channel of longitudinal slope S andhydraulic mean depth R is given by
- 4RS
- 11 RS
- 7RS
- 15 RS
Q5 | The ratio of average values of shear stresses produced on the bed and the banks of a channeldue to flowing water is
- less than 1
- equal to 1
- greater than 1
- equal to zero
Q6 | If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is
- 0.5 xc
- 0.75 TC
- xc
- 1.33 TC
Q7 | As per Lacey's theory, the silt factor is
- directly proportional to average par¬ticle size
- inversely proportional to average par¬ticle size
- directly proportional to square root of average particle size
- not related to average particle size
Q8 | Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey's theory will be
- 19 m
- 38m
- 57m
- 76m
Q9 | Which of the following canal structures is used to remove surplus water from an irrigationchannel into a natural drain ?
- canal fall
- canal outlet
- canal escape
- canal regulator
Q10 | For a proportional outlet, the flexibility is
- zero
- between zero and 1
- 1
- greater than 1
Q11 | The sensitivity of a rigid module is
- zero
- between zero and one
- 1
- infinity
Q12 | Which of the following is a flexible outlet ?
- submerged pipe outlet
- Kennedy's gauge outlet
- Gibb's outlet
- none of the above
Q13 | A straight glacis type fall with a baffle platform and a baffle wall is called
- vertical dropfall
- glacis fall
- Montague type fall
- inglis fall
Q14 | Which of the following types of falls use parabolic glacis for energy dissipation ?
- vertical drop fall
- glacis fall
- Montague type fall
- inglis fall
Q15 | In a Sarda type fall, rectangular crest is used for discharge upto
- 6 cumecs
- 10 cumecs
- 14 cumecs
- 20 cumecs
Q16 | Which of the following can be used as a meter fall ?
- vertical drop fall
- flumed glacis fall
- unflumed glacis fall
- all of the above
Q17 | Vertical drop fall is satisfactory for a height upto
- 0.5 m
- 1.5 m
- 3.5 m
- 5.0 m
Q18 | Which of the following canal outlets maintains a constant discharge ?
- non-modular outlet
- flexible outlet
- rigid module
- none of the above
Q19 | The ratio of rate of change of the discharge of an outlet to the rate of change of thedischarge of distributing channel is called
- proportionality
- flexibility
- setting
- sensitivity
Q20 | The drainage water intercepting the canal can be disposed of by passing the canal below thedrainage in
- aqueduct and syphon aqueduct
- aqueduct and super passage
- super passage and canal syphon
- level crossing
Q21 | If the R.L's of canal bed level and high flood level of drainage are 212.0 m and 210.0 mrespectively, then cross drainage work will be
- aqueduct
- superpassage
- syphon
- syphon aqueduct
Q22 | The aqueduct or superpassage type of works are generally used when
- high flood drainage discharge is small
- high flood drainage discharge is large and short lived
- high flood drainage discharge is large and continues for a long time
- none of the above
Q23 | An aggrading river is a
- silting river
- scouring river
- both silting and scouring river
- neither silting nor scouring river
Q24 | Tortuosity of a meandering river is the ratio of
- meander belt to meander length
- meander length to meander belt
- curved length along the channel to the direct axial length of the river reach
- direct axial length of the river reach to curved length along the channel
Q25 | The meander pattern of a river is developed by
- average discharge
- dominant discharge
- maximum discharge
- critical discharge