The flow of glycerin (kinematic viscosity v =5 × 10–4 m2/s)in an open channel is to be modeled in a laboratory flume using wate (v = 10–6m2/s) as the flowing fluid. If both gravity and viscosity are important, what should be the length sclae (i.e. ratio of prototype to model dimensions)for maintaining dynamic similarity?
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If Taylor’s Stability Number, Sn is 0.08 and if the canal flows full, the factor of safety with respect to cohension against failure of the canal bank slopers will be
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If the elastic modulus and the Poisson’s ratio of the claylayer are respectively 50 × 103 kPa and 0.4 and if the influence factor for the strip footing in 1.75, the elastic settlement of the footing will be __________ .
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Solution
Elastic settlement,\(S_{i}=\left ( \frac{1+ 0\mu ^{2}}{E} \right )qBlr\)
A granular soil possesses saturated density of 20 kN/m2.Its effective angle of internal friction is 35 degres.If the desired factor of safety is 1.5, the safe angle of slope forth is soil,when seepage occures at and parallel to the slope surface, will be __________ .
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For the load on inner and outer wheels to be equal for a vehicle moving with 60 kmph about a horizontl circular curve of radius 100 m, super elevation will be __________ .
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Which of the following is not correct for steel sections as per ISO:800-1984?
A rectangular open channel of width 6 m is carrying a discharge of 120 m3/s. If Froude’s number is 0.8, the depth of flow in channel is
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Bituminous concrete is a mix comprising of
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Bituminous concrete consists of bitumen, coarse and fine aggregate
Four cross-sections are required to be ordered in the increasing order of their respective shape factors.
Which of the following order is correct?
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C, D, A, B
When an unconfined compression test is conducted on a cylinder of soil, it fails under axial stress of 1.2 kg/cm2. The failure plane makes an angle of 50° with the horizontal.Determine the cohesion and angle of internal friction of soil.
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Solution
0.5
α = 45 + φ⁄2
⇒ 50 = 45 + φ⁄2
φ = 10°
qu = 2 Cu tan α
1.2 = 2 × Cu tan (50)
Cu = 0.5 kg/cm2.