Q.1
Which of the following is the main source for eutrophication of surface water?
  • a) Nitrogen
  • b) Calcium
  • c) Magnesium
  • d) Potassium
Q.2
Amino nitrogen and heterocyclic nitrogen can be degraded by biological method by first converting it into ______________
  • a) Ammonia
  • b) Nitrate
  • c) Sulphate
  • d) Carbon dioxide
Q.3
Which of the following process is not involved in the removal of nitrogen?
  • a) Nitrification
  • b) Ammonification
  • c) Denitrification
  • d) Desalination
Q.4
Autotrophic nitrification leads to formation of nitrate by conversion of ammonia.
  • a) True
  • b) False
Q.5
Which of the following is not an after effect of accumulation of nitrogen and phosphorus in aquatic ecosystem?
  • a) Adverse health conditions
  • b) Algal blooms
  • c) Increase in water quality
  • d) Reduction in marine life
Q.6
Which of the following genera the nitrifying bacteria doesn’t belong to?
  • a) Nitrosomonas
  • b) Nitrosococcus
  • c) Nitrosospira
  • d) Pseudomonas
Q.7
The optimal removal of phosphate by biological method should have a COD/P ratio ofCOD/g of phosphate.
  • a) True
  • b) False
Q.8
Ferrous ions can supplement biological phosphate removal.
  • a) True
  • b) False
Q.9
Expand OLNAD.
  • a) Oxygen limited nitrification and denitrification
  • b) Oxygen reduced nitrification and denitrification
  • c) Oxygen limited ammonification and denitrification
  • d) Oxygen reduced nitrification and ammonification
Q.10
The major disadvantage of heterotrophic nitrification is ____________ for final disposal.
  • a) excess sludge generation
  • b) less sludge generation
  • c) presence of oxygen
  • d) presence of carbon source
0 h : 0 m : 1 s