Important questions

IMPORTANT QUESTIONS

The following questions appeared in Osmania University (OU) examinations

• What are the various sources of water (3)
• Discuss briefly the importance of treating water for public supply (2)
• Write about breakpoint chlorination. (3)
• Explain the importance of chemical and bacteriological analysis of water used for domestic purpose (2)
• Explain the terms: BOD, COD & TOC (3)
• What are the factors effecting storm sewage (2)
• What do you understand by preliminary treatment of sewage? Enumerate the various unit operations involved in preliminary treatment of sewage (3)
• Describe the various methods used for aeration in the activate sludge process (2)
• Describe the components of a septic tank with the aid of sketch (2)
• What are the methods of collection of solid waste? (3)
• Predict future population by incremental increase method (5)
• Water distribution system & solution to pipe network problem using hardy cross method (5)
• Design of sedimentation tank problem (5)
• Rapid sand filters and slow sand filters (5)
• Sewer problems - calculate velocity and discharge when running full and partially full (5)
• Velocity of flow in sewers by empirical formulae & detailed steps for the design of sewer (5)
• Design secondary settling tank problem (5)
• Preliminary treatment (5)
• Collection, recovery & disposal of solid refuse (5)
• Design septic tank (5)
• Calculation of ultimate BOD (5)
• Low cost waste treatment using oxidation ponds and RBC (5)
• Disinfection - necessity and methods (5)
• Sewer types & appurtenances (5)
• Sludge dilution & disposal (5)
• Factors to be considered in planning a water supply scheme for a city (2)
• Factors affecting rate of demand (2)
• Impurities to be taken into account while deciding potability of water (2)
• Slow rate water filter vs fast rate water filter (3)
• Water distribution systems & advantages of each (2)
• self-cleansing velocity & limiting velocity in sewers (2)
• Secondary treatment of sewage and biological treatment techniques (3)
• Horizontal flow grit chamber & sketch (3)
• Functioning & design aspects of septic tank (3)
• Solid waste management (3)
• Pipe network problem (10)
• Design of slow sand filter (7)
• Define flow through period (3)
• BOD, DO problem (7)
• Estimating storm water using rational method (3)
• Design high rate trickling problem (7)
• sedimentation and its requirement (3)
• Various types of solid waste and its composition (5)
• Design a septic tank (5)
• Ultimate BOD problem (5)
• Low cost waste treatment methods - oxidation pond and RBC (5)
• Ultimate BOD, 10 day & 5 day BOD (5)
• Oxidation pond & RBC (5)
• sewer types & appurtenances (3)
• Objectives of Protected Water Supply schemes (2.5)
• Quality of water from slow and fast sand filters compare & justify (2.5)
• Limits of turbidity, total hardness and alkalinity in water (2.5)
• Shapes adopted in sewers - why (2.5)
• 5 day BOD (2.5)
• BOD vs COD (2.5)
• Disposal of sludge (2.5)
• sketch & explain trickling filter (2.5)
• Disinfection & various methods of disinfection (2.5)
• velocity of flow in pipe running full (2.5)
• Factors affecting per capita consumption of water (3)
• Quality and quantity of surface and ground water sources (3)
• Explain hardy cross method - pipe distribution network (4)
• Design slow sand filter (7)
• Determination of optimum dosage of coagulant (3)
• Define BOD, COD, equation of BOD. Effect of temperature on BOD equation and rate constant K. (6)
• Estimation of storm water by rational method (4)
• Activated sludge process with diagram (5)
• Design of grit chamber with sketch (5)
• Design of septic tank with sketch (6)
• Sludge digestion process (4)
• Schematic diagram of a water treatment plant if surface water is source & list objectives of each unit (7)
• Meaning of low cost waste treatment (3)
• Construction and maintenance of sewers with salient features like materials used, shape, slope and gradient adopted (6)
• Standards of potable water (4)
• Factors affecting population forecasts (3)
• Design period definition and its value for different components of a water supply scheme (3)
• Pressure filters - merits & demerits (3)
• Ozone & UV rays for disinfection; its disadvantages (3)
• Quantity of storm water using rational method (3)
• Discuss self-purification of rivers (2)
• List unit operations in primary treatment & their objectives (2)
• Role of secondary settling tank in activated sludge process (2)
• Sketch functioning of oxidation ponds (2)
• Explain functioning of septic tank with sketch (2)
• List methods for distribution network analysis & discuss hardy cross method in detail (5)
• Estimate fire demand of a town using any TWO methods (5)
• Draw, name & discuss various components of a slow sand filter (6)
• Design a slow sand filter and discuss effective size and uniformity coefficient of sand particles (4)
• Important parameters to measure organic content in sewage & significance (6)
• Determine BOD5 given BOD1 assuming K20 (4)
• BOD removal in trickling filters with sketch & modifications with flow-diagrams (6)
• Design a low rate trickling filter (4)
• MSW, garbage, refuse, bulk waste .... discuss disposal methods (6)
• Role of secondary settling tank in trickling filter (4)
• Steps in sludge handling and process in anaerobic digestor (5)
• Design septic tank (5)
• Notes on:
• -Estimation of storm water (2.5)
• Break-point chlorination (2.5)
• Taste & Odour control (2.5)
• Backwash mechanism (2.5)