Q.1
What is Waste Water Engineering?
  • a) use of engineering approaches to enhance the cleanliness of human populations
  • b) removing and disposing of human waste
  • c) providing safe drinking water
  • d) all of the mentioned
Q.2
How is Chemical Oxygen Demand (COD) calculated?
  • a) Waste water is oxidised chemically using strontium in acid solutions
  • b) Waste water is oxidised chemically using bromine in acid solutions
  • c) Waste water is oxidised chemically using dichromate in acid solutions
  • d) Waste water is oxidised chemically using sodium in acid solutions
Q.3
Which of the following is the next step after water abstraction in waste water treatment?
  • a) Treatment
  • b) Supply to consumers
  • c) Supply to receiving body
  • d) Combine with stormwater
Q.4
Which of the following type of treatment methods are used for municipal and industrial waste waters?
  • a) Main stream
  • b) Slow rate
  • c) Overflow
  • d) Rapid infiltration
Q.5
What is the minimum diameter of pipes used for drainage of waste water?
  • a) 105 mm
  • b) 50 mm
  • c) 100 mm
  • d) 75 mm
Q.6
Which of the following type of waste water treatment process is used for treating waste water or industrial waste water using aeration and biological flocs?
  • a) Biological aeration
  • b) Anaerobic digestion
  • c) Active sludge process
  • d) Aeration
Q.7
Which of the following is called as the waste water from different sources like bathrooms, kitchens, and washbasins?
  • a) Discharge
  • b) Sullage
  • c) Garbage
  • d) Sewage
Q.8
What is the waste water flow in a sewer system during the periods of dry weather with minimum infiltration called?
  • a) Wet flow
  • b) Dry flow
  • c) Dry weather flow
  • d) Wet weather flow
Q.9
What percentage of solids does waste water contain?
  • a) 0.1%
  • b) 1%
  • c) 0.5%
  • d) 5%
Q.10
When alum is added to the waste water containing calcium ions which compound is formed as a precipitate?
  • a) Al2 (SO4)3
  • b) CaCO3
  • c) Al(OH)3
  • d) Ca(OH)2
Q.11
What is the lowest waste water flow in hospitals?
  • a) 40 lpcd
  • b) 900 lpcd
  • c) 700 lpcd
  • d) 50 gpcd
Q.12
How many forms of nitrogen are present in waste water?
  • a) 5
  • b) 4
  • c) 3
  • d) 2
Q.13
Which of the following water carriage system is used in urban cities like Bangalore?
  • a) Partially separate system
  • b) Partially combined system
  • c) Combined system
  • d) Separate system
Q.14
Assume in a sample of waste water aroundTSS is removed by primary sedimentation without chemical addition. Calculate the mass of TSS removed for the following data.
  • a) 132 kg/d
  • b) 100 kg/d
  • c) 102 kg/d
  • d) 130 kg/d
Q.15
Which of the following is the controlled application of waste water onto the land surface to achieve a specified level of treatment?
  • a) Soil treatment
  • b) Land treatment
  • c) Waste water treatment
  • d) Water treatment
Q.16
Advanced waste water sludge constitutes which of the following?
  • a) Chemical and biological solids
  • b) Biological solids
  • c) Settlable solids
  • d) Chemical sludge
Q.17
What is the maximum concentration of total solids present in waste water?
  • a) 850 mg/L
  • b) 1200 mg/ L
  • c) 720 mg/L
  • d) 350 mg/L
Q.18
Which of the following tends to resist conventional methods of waste water treatment?
  • a) Refractory organics
  • b) Priority pollutants
  • c) Suspended solids
  • d) Nutrients
Q.19
Which of the following waste water constituents are removed by chemical immobilization?
  • a) Suspended solids
  • b) Metals
  • c) Phosphorus
  • d) BOD
Q.20
Which of the following represents the heavier inert matter in waste water?
  • a) Screens
  • b) Grit
  • c) Debris
  • d) Waste
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