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This set of MCQs helps students to learn about unit Operations which are the physical operations to remove the impurities present in the water and waste water, screening defined as a wastewater pre-treatment, which aims to prevent coarse solids, such as plastics, rags and other trash, from entering a sewage system or treatment plant. and aeration which is used to oxidize soluble iron and manganese (found in many well waters) to insoluble precipitates.
In which unit operation, gases are released or absorbed in the water?
In which unit operation, gases are released or absorbed in the water?
How many types of aerators are commonly used in the treatment of water?
Which of the following process is used to remove the colloidal particles from water?
Flocculation of iron from water by the addition of lime is an example of which of the following process?
In which form of solute stabilization, hydrogen sulfide in water is oxidized into sulfate?
Which form of solute stabilization occurs when water passes through limestone?
In which process, excess lime is converted into bicarbonate?
By which process, odour producing substances is oxidized?
Solids are removed from the water by which of the following unit operation?
Dealkalization results in removal of all the ions from the water.
Which process of water treatment is done to avoid floating debris, branches, trees or other large particles suspended in water?
What is the size of the coarse screen used in pretreatment of water?
The coarse screen is inclined at _____ to facilitate the cleaning or raking.
Identify the incorrect statement regarding aeration process.
Organic contaminants are removed from the water by the process of ______.
Water softening
Demineralization
Absorption
Adsorption
