Related Questions

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is
A 1.25 D
B 1.50 D
C 1.75 D
D 2.00 D
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is
A $$\frac{{2{{\text{V}}^2}}}{{\sqrt 3 {\text{R}}}}$$
B $$\frac{{3{{\text{V}}^2}}}{{4{\text{R}}}}$$
C $$\frac{{5{{\text{V}}^2}}}{{2{\text{R}}}}$$
D $$\frac{{2{{\text{V}}^2}}}{{5{\text{R}}}}$$
The Lacey's regime velocity is proportional to
A $${{\text{R}}^{\frac{1}{2}}}{{\text{S}}^{\frac{3}{4}}}$$
B $${{\text{Q}}^{\frac{3}{4}}}{{\text{S}}^{\frac{1}{3}}}$$
C $${{\text{R}}^{\frac{3}{4}}}{{\text{S}}^{\frac{1}{3}}}$$
D $${{\text{R}}^{\frac{2}{3}}}{{\text{S}}^{\frac{1}{2}}}$$
The scour depth D of a river during flood, may be calculated from the Lacey's equation
A D = 0.47 $$\left( {\frac{{\text{Q}}}{{\text{f}}}} \right)$$
B D = 0.47 $${\left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{1}{2}}}$$
C D = 0.47 $${\left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{1}{3}}}$$
D D = 0.47 $${\left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{2}{3}}}$$
As per Lacey’s theory, the silt factor is
A directly proportional to average par¬ticle size
B inversely proportional to average par¬ticle size
C directly proportional to square root of average particle size
D not related to average particle size
Lacey's equation for calculating flood discharge in rivers, is
A $${\text{V}} = 10.8\,{{\text{R}}^{\frac{1}{2}}}{{\text{S}}^{\frac{1}{2}}}$$
B $${\text{V}} = 10.8\,{{\text{R}}^{\frac{2}{3}}}{{\text{S}}^{\frac{1}{2}}}$$
C $${\text{V}} = 10.8\,{{\text{R}}^{\frac{2}{3}}}{{\text{S}}^{\frac{1}{3}}}$$
D $${\text{V}} = 10.8\,{{\text{R}}^{\frac{1}{3}}}{{\text{S}}^{\frac{2}{3}}}$$
If average particle size of the silt in millimeters is m, the Lacey's silt factor f is proportional to
A m3
B $${{\text{m}}^{\frac{1}{2}}}$$
C $${{\text{m}}^{\frac{1}{3}}}$$
D $${{\text{m}}^{\frac{2}{3}}}$$
Regime conditions in a channel may occur if
A Discharge is constant
B Channel flows uniformly in incoherent alluvium as that transported in suspension
C Silt grade and silt charge are constant
D All the above
The Central Government has launched which of the following app to verify the GST (Goods and Services Tax) Rates under the GST regime?
A GST Rate Searcher
B GST Rate Explorer
C GST Rate Finder
D GST Rate Google
The burnout heat flux in the nucleate boiling regime is not a function of the
A Liquid density
B Vapour density
C Temperature difference
D Heat of evaporation

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