Q.1
SBR is a type of ________
  • a) Aerobic process
  • b) Activated sludge process
  • c) Anaerobic process
  • d) Chemical process
Q.2
The one tank is aerating and filling while the other one is decant.
  • a) True
  • b) False
Q.3
Bio-selectors direct the flow.
  • a) True
  • b) False
Q.4
___________ helps to mix the incoming influent and the returned activated sludge.
  • a) Walls
  • b) Orifice
  • c) Manifold
  • d) Bio-selector
Q.5
How is mixing done in SBR?
  • a) Manual
  • b) Mechanical
  • c) Air stripping
  • d) Agitation by air
Q.6
In which stage of the SBR is aeration performed?
  • a) First
  • b) Second
  • c) Third
  • d) fourth
Q.7
In which stage are the aeration and mixing avoided?
  • a) First
  • b) Second
  • c) Third
  • d) Fourth
Q.8
The multiplication of _________ is encouraged by the addition of oxygen.
  • a) Bacteria
  • b) Aerobic bacteria
  • c) Anaerobic bacteria
  • d) Fungi
Q.9
______ is used to remove phosphorus compounds from the liquor.
  • a) Aluminium nitrate
  • b) Aluminium phosphate
  • c) Aluminium sulphate
  • d) Sodium nitrate
Q.10
The _________ is usually the same length in time as the aeration.
  • a) Screening stage
  • b) Mixing stage
  • c) Clarification stage
  • d) Settling stage
Q.11
Which part of the tank is suitable for anaerobic bacteria to flourish?
  • a) Top
  • b) Bottom
  • c) Sides
  • d) Middle zone
Q.12
______ is removed by Anammox.
  • a) Nitric oxides
  • b) Nitrate
  • c) Nitrite
  • d) Ammonia
Q.13
How many types of BOD are present?
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.14
BOD is a physical procedure for determining DO needed for aerobic biological organisms.
  • a) True
  • b) False
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