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Environmental Biotechnology
Environmental Biotechnology Written Test
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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
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