Agriculture MCQs

Page No. 163

At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?


aSubmerged exit gradient

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bCritical exit gradient

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cBalanced exit gradient

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dAll are correct

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Now- a -days the hydraulic structures are designed. Keeping in view the flow net, this was given by __________________?


aBlight

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bKhosla

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cLane

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dDarcy

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View Answer Khosla

To avoid scouring from end of structure, it is necessary to provide a ________________ at the exit point?


aVertical cutoff

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bStone apron

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cStone boom

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dStone blocks

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View Answer Vertical cutoff

For strong Hydraulic jump containing maximum energy, the down stream glacis should be sloped at a slope of ______________ to dissipate max: energy?


a2:1 to 2.5:1

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b2.5:1 to 3:1

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c3:1 to 5:1

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d5.1 to 6

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View Answer 3:1 to 5:1

When a weir is constructed, the downstream .bed of the river goes on eroding and consequently causes progressive lowering of the bed on downstream of weir called__________________?


aRetrogression

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bLowering down of bed

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cPonding on down stream

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dAll are correct

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View Answer Retrogression

The water way from a weir is determined by using Lacey’s wetted perimeter i.e. P=_______(Q)1/2 ?


a3.50

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b3.75

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c4.75

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d5.75

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View Answer 4.75

A water pool is designed on the down stream of the hydraulic structure to dissipate the energy of falling water by providing a water cushion called ______________________?


aWater pool

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bCistern

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cDown stream pond

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dWater cushion

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View Answer Cistern

A module or outlet in which discharge depends upon the difference of head between distributary and the water course is called ___________________?


aNon-modular

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bModular

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cSemi-modular

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dRigid modulae

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View Answer Non-modular

An outlet through which the discharge depends upon the water level in the distributary is called ___________________?


aRigid module

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bFlexible module

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cNon-flexible

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dNon-modular

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View Answer Flexible module

The ratio of the rate of change of discharge through out let to the rate of c./v of water level of the distributary is called_________________?


aFlexibility

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bProportionally

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cSetting

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dSensitivity

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View Answer Sensitivity

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