Irrigation Engineering

121) The acidity in the soils is indicated by a pH value of

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less than 7

122) Which of the following is the aggrading river?

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neither loosing nor building its bed

123) which is the degrading river

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building up its bed

124) Spurs are provided

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to train the flow of a river along a specified course

125) In a repelling groyne, the axis of the groyne (w.r.t. the river flow direction) makes

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a right angle

126) The weight of silt carried by the river per unit volume of water is termed as

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silt charge

127) The top of the weir or spillway is called

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crest

128) The proportion of silt in water is called

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silt charge

129) Stone pitching, or any other material laid on a sloping face of an earthen bank to maintain its slope or to protect it from erosion is called

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revetment

130) An excavation filled with impervious material to reduce seepage is called

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both (a) and (b

Subject Notes

Objective Box

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