47 Water Supply & Sanitation Chapter Wise McQ Test of 25 Question #18 Water Supply & Sanitation Chapter Wise McQ Test of 25 Question for PSC, NEC, UPSC, SSC and Many more. 1 / 25 1. Rate filtration of Rapid sand filter is A. 100 to 200 litter/hour/m² B. 120 to 300 litter/hour/m² C. 3000 to 6000 litter/hour/m² D. 3200 to 6000 litter/hour/m² 2 / 25 2. Rate filtration of slow sand filter is A. 100 to 200 litter/hour/m² B. 120 to 300 litter/hour/m² C. 3000 to 6000 litter/hour/m² D. 3200 to 6000 litter/hour/m² 3 / 25 3. The rate of filtration of slow sand filter A. 1/ 30 𝑜𝑓 𝑅𝑎𝑝𝑖𝑑 𝑠𝑎𝑛𝑑 𝑓𝑖𝑙𝑡𝑒r B. 1/ 20 𝑜𝑓 𝑅𝑎𝑝𝑖𝑑 𝑠𝑎𝑛𝑑 𝑓𝑖𝑙𝑡𝑒r C. 1/ 10 𝑜𝑓 𝑅𝑎𝑝𝑖𝑑 𝑠𝑎𝑛𝑑 𝑓𝑖𝑙𝑡𝑒r D. 1/5 𝑜𝑓 𝑅𝑎𝑝𝑖𝑑 𝑠𝑎𝑛𝑑 𝑓𝑖𝑙𝑡𝑒r 4 / 25 4. Disinfection of water involves A. killing of disease bacteria B. produce of diseases bacteria C. facultative bacteria D. none of the above 5 / 25 5. Disinfection of water helps in …… A. Removing turbidity B. Removing hardness C. Killing pathogenic bacteria D. Complete sterilization 6 / 25 6. A heavy metal capable of disinfecting is A. Lead B. Copper C. Zinc D. Silver 7 / 25 7. The suitable method for disinfection of swimming pool water is …… A. Ultra violet ray’s treatment B. Excess lime treatment C. Iodine and bromine treatment D. Ozone treatment 8 / 25 8. Disinfection of water with ozone is not good because A. It vanishes before water reaches the consumers B. It removes the color, taste and odour from water as bacteria’s C. It adds taste to the water D. It is more efficient than chlorine in killing bacteria’s 9 / 25 9. The SODIS method of water purification is a process of A. chlorination B. solar disinfection C. system of disinfected integral supply D. Supply of disinfected and improved water system. 10 / 25 10. The disinfection efficiency of chlorination increase with A. Increase in temperature of water B. Decrease in temperature of water C. No affected due to temperature D. None of the above 11 / 25 11. Sterilization is the process of A. Killing of disease bacteria B. Produce of diseases bacteria C. No change diseases bacteria D. Eliminating all the life 12 / 25 12. Sterilization of water helps in killing of ….. A. Only pathogenic bacteria B. Only non-pathogenic bacteria C. Only certain kind of microorganisms D. All kinds of bacteria and microorganism 13 / 25 13. The process of obtaining energy for their (bacteria) synthesis after the oxidation of organic or inorganic matter is called A. Photosynthesis B. Chemosynthesis C. Both D. None 14 / 25 14. The most ideal disinfectant is A. Chlorine B. Alum C. Iron D. Salt 15 / 25 15. Which of the following is standard form chlorination? A. Post chlorination B. Pre chlorination C. Break point chlorination D. Supper chlorination 16 / 25 16. Raw water treated with only chlorine is known as ……..chlorination A. Plain chlorination B. Pre chlorination C. Break point chlorination D. Supper chlorination 17 / 25 17. Chlorine demand of water is equal to …….. A. Applied chlorine B. Residual chlorine C. Sum of applied chlorine and residual chlorine D. Difference of applied and residual chlorine 18 / 25 18. The dose of pre-chlorination is A. 0.1 to 0.5 ppm B. 0.1 to 0.2 ppm C. 1 to 2ppm D. all of the above 19 / 25 19. At break point of chlorination A. Residual chlorine reappears B. residual chloride is maximum C. residual chloride is zero D. chlorine is used to oxidize 20 / 25 20. Aerator removes…… A. Sand B. Silt C. Flocs D. Taste and odour 21 / 25 21. Aeration of water is due to A. Remove carbon dioxide and taste in water B. Remove taste and odour in water C. Increase quantity of oxygen in water D. all of the above 22 / 25 22. Aeration of water is done by A. Spray nozzles B. Cascading C. Trickling bed D. All of the above 23 / 25 23. The chemical formula of bleaching power is A. CaoCl2 B. CaO2Cl C. CaOCl D. None of the above 24 / 25 24. The percentage of chlorine in fresh bleaching powder is about….. A. 10 to 16% B. 20 to 26% C. 30 to 35% D. 40 to 46% 25 / 25 25. Fluoridation is done to A. Protect children teeth B. Protect from dental fluorosis C. Protect from both dental and skeletal flourosis D. Add taste to water Your score is The average score is 42% 0% Restart quiz Exit civil engineermcqcivilpscupscWater Supply & Sanitation
