Soil Mechanics and Foundation
Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.If other things remain constant, the coefficient of permeability

increases by 33.3%
increases by 25%
increases by 50%
decreases by 33.3%

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Soil Mechanics and Foundation
In hydrometer analysis for a soil mass

meniscus correction is additive and dispersing agent correction is subtractive
both meniscus correction and dispersing agent correction are additive
meniscus correction is subtractive and dispersing agent correction is additive
both meniscus correction and dispersing agent correction are subtractive

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