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


bCritical exit gradient


cBalanced exit gradient


dAll are correct



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


aBlight


bKhosla


cLane


dDarcy


View Answer Khosla

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


aVertical cutoff


bStone apron


cStone boom


dStone blocks


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


b2.5:1 to 3:1


c3:1 to 5:1


d5.1 to 6


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


bLowering down of bed


cPonding on down stream


dAll are correct


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


b3.75


c4.75


d5.75


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


bCistern


cDown stream pond


dWater cushion


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


bModular


cSemi-modular


dRigid modulae


View Answer Non-modular

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


aRigid module


bFlexible module


cNon-flexible


dNon-modular


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


bProportionally


cSetting


dSensitivity


View Answer Sensitivity

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