Civil Engineering > GATE 2021 SET-2 > Environmental Engineering
A water filtration unit is made of uniform-size sand particles of 0.4 mm diameter with a shape factor of 0.84 and specific gravity of 2.55. The depth of the filter bed is 0.70 m and the porosity is 0.35. The filter bed is to be expanded to a porosity of 0.65 by hydraulic backwash. If the terminal settling velocity of sand particles during backwash is 4.5 cm/s, the required backwash velocity is
Correct : b
Similar Questions
The reaction rate involving reactants A and B is given by -k[A]α[B]β. Which one of the following statements is valid for the reaction to be a first-order reacti...
The wastewater from a city, containing a high concentration of biodegradable organics, is being steadily discharged into a flowing river at a location S. If the...
Which one of the following is NOT present in the acid rain?
Total Unique Visitors
Loading......