
Live examination 25-06 -2019 [Environmental engineering]
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10 questions
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- Q1A treatment system suitable for small and medium sized towns and cities isAerated lagoonActivated sludge processTrickling filterOxidation pond30s
- Q2Highest BOD removal efficiency is achieved inOxidation ditchTrickling filterOxidation pondAerated lagoon30s
- Q3Putrefaction is a process ofAerobic decompositionFacultative decompositionAnerobic decompositionIntermitttent decomposition30s
- Q4As a result of stabilisation of sewage effluent themost appropriate endproduct produced isPlant nitrateAlkalinityHardnessChloride30s
- Q5Chemical oxygen demand isOxygen required to oxidise both biologically active and inactive inorganic matterOxygen required to oxidise biologically inactive organic matterOxygen required to oxidise both biologically active and inactive organic matterOxygen required to oxidise biologically active organic matter30s
- Q6A single rapid test to determine the pollution status of a riverChlorideDOTotal solidsNitrate30s
- Q7For a continuos flow type sedimentation tanksWidth of tank is kept about 6mLength of tank is kept 4-5 times widthMaximum horizontal flow velocity is kept about 0.3m/minAll of these30s
- Q8No treatment of sewage is needed if dilutuon factor isBetween 150 to 300Less than 150More than 500Between 150 to 25030s
- Q9A sewer that unloads the sewage to point of treatment is calledOutfall sewerLateral sewerTrunk sewerHouse sewer30s
- Q10Sludge does not contain waste water fromToiletWash basinBathroomKitchen30s