adequately represented by the sum of (a) elevation head and pressure head. (b) e

Question

adequately represented by the sum of (a) elevation head and pressure head. (b) elevation head and velocity head. (c) pressure head and velocity head. (d) none of the above In which of the following flow zones, the discharge velocity bear:, a linear relationship the hydraulic gradient? (a) laminar flow zone (b) transition flow zone (c) turbulent flow zone (d) all of the above For the flow of water through the void spaces of most saturated soils, (a) discharge velocity is proportional to the hydraulic gradient. (b) discharge velocity is proportional to the square of hydraulic gradient. (c) discharge velocity is inversely proportional to the hydraulic gradient. (d) discharge velocity is inversely proportional to the square of hydraulic gradient. 16. If discharge velocity of waiter through a soil is 24 cm/hr and soil porosity is 30%, Ok seepage velocity will be (a) 24 cm/hr. (b) 72 cm/hr. (c) 80 cm/hr. (d) none of the above The hydraulic conductivity of soil does not depend on (a) unit weight of soil solids. (b) unit weight of water flowing through the void spaces of the soil. (c) viscosity of water flowing through the void spaces of the soil. (d) void ratio of the soil. The absolute permeability of soil is expressed in a)m (b) m^2 (c) m/s (d) m^2/s Which of the following soils has a highly complex structure? (a) Gravelly soil (b) Sandy soil (c) Silty soil (d) Clayey soil Soil classification systems provide a common language to express concisely (a) strength characteristics of soils. (b) permeability characteristics of soils.

Explanation / Answer

18) The permeability of soil (K) = Q/iA

K = (m3/s)/(m2)

k = m/s

16) Seepage velocity = darcy velocity / porosity = 24/0.3 = 80 cm/hr

19) Clayey soil has highly complex structure

15) a) darcy velocity is proportional to hydraullic gradient

v = ki

v is proportional i

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