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1. Muddy water is treated with alum in purification process, it is termed as : -





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MCQ->Muddy water is treated with alum in purification process, it is termed as : -....
MCQ->Consider the following statements : 1. Alum coagulation decreases the alkalinity of water. 2. Alum coagulation increases permanent hardness of water. 3. Alum coagulation decreases pH of water. 4. Alum coagulation produces aluminium hydroxide flocks in the flocculation process. Which of the statements given above are correct ?....
MCQ->Which of the following are associated with alum coagulation ? 1. A decrease of alkalinity in treated water 2. Formation of hydroxide flocs of aluminium 3. A slight decrease of pH in treated water 4. An increase of permanent hardness Select the correct answer using the codes given below :....
MCQ->A water treatment plant is required to process 28800 m3/d of raw water (density = 1000 kg/m3, kinematic viscosity = 10-6 m2/s). The rapid mixing tank imparts tank a velocity gradient of 900s-1 to blend 35 mg/l of alum with the flow for a detention time of 2 minutes. The power input (W) required for rapid mixing is....
MCQ->Consider the following statements in regard to aerobic and anaerobic treatment processes : 1. Biomass production in the aerobic treatment process is more as compared to the anaerobic treatment process. 2. Start-up period is more in the aerobic treatment process as compared to the anaerobic treatment process. 3. Energy consumption and production is more in the aerobic treatment process as compared to the anaerobic treatment process. Which of the statements given above is/are correct ?....
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