Soil Mechanics & Foundation

91) Falling head permeameter is preferable when soil sample is

Discuss in Comment

clayey

92) The range of coefficient of permeability of sands is about

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10^-2 to 1

93) The value of the coefficient of permeability of clays is

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< 10^-6

94) The presence of entrapped air in a soil will

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decrease the permeability

95) The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m and of sp. gr. 2.67 and void ratio of 0.67 is equal to

Discuss in Comment

1.5 m

96) The phenomenon in which a cohesionless soil loses all its shear strength and the soil particles have a tendency to move up in the direction of flow, is known as

Discuss in Comment

all the above

97) The quantity of seepage in a soil is

Discuss in Comment

directly proportional to the coeff. of permeability

98) Flow net consists of a number of stream lines and equipotential lines which are

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orthogonal to each other

99) The seepage force in a soil is

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perpendicular to the equipotential lines

100) The coefficient grain size of soil (D ) is 0.3 mm, the value of coefficient of permeability as per Hazen is (coefficient of Hazen C = 10)

Discuss in Comment

0.9 mm/ sec

Subject Notes

Objective Box

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