Test: Types Of Settling Tanks
5 Questions MCQ Test Environmental Engineering | Test: Types Of Settling Tanks
How many types of sedimentation tanks are there on the basis of method of operation?
Explanation: There are two types sedimentation tanks on the basis of method of operation, namely Fill and draw type and Continuous flow type.
In which type of sedimentation, the flocculent suspension of the intermediate concentration takes place?
Explanation: In type III sedimentation, the inter-particle forces hold the particle together and the flocculent suspension of the intermediate concentration takes place.
In which type of sedimentation,the flocculent suspension of high concentration takes place?
Explanation: In type IV sedimentation,the flocculent suspension of high concentration takes place and particles comes in contact with each other resulting in the formation of structure.
When the impurities are separated by the gravitation of settling particles, the operation is called ______
Explanation: In plain sedimentation, the impurities are separated from a suspending fluid by use of natural forces like gravitational forces.
What is the settling velocity of the particle in the wastewater if its diameter is 2 * 10-3cm. Given G=2.65, viscosity v=8 * 10-3cm2/Sec?
Explanation: Settling velocity of the particle in wastewater is given by vs=g (G-1) d2/18v
Specific gravity G=1, g=981cm2/Sec, viscosity v=8 * 10-3cm2/Sec
vs = 981 * (2.65-1) * 0.002 * 0.002/(18 * 0.008) = 0.13cm/Sec.
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