Sewage Treatment And Energy Generation Test
Sewage Treatment And Energy Generation
This is online test 01 for CBSE class 12 Biology Microbes in Human Welfare (Sewage treatment and energy generation).. There are 10 questions in this test with each question having around four answer choices.
Questions & Answers
1
Treatment of waste water is done by
- AVirus
- BProtozoa
- CAutotrophic microbes
- DHeterotrophic microbesCorrect
2
Masses of bacteria associated with fungal filaments to form mesh like structures is called
- AHyphae
- BFlocsCorrect
- CBulk
- DNostoc
3
The amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria is called
- ATotal oxygen demand
- BBiological Oxygen DemanCorrect
- Ctotal organic demand
- Dbiological water deman
4
Biogas is produced by
- AAnaerobic breakdown of biomassCorrect
- BAerobic breakdown of biomass
- CIncomplete oxidation
- DComplete oxidation
5
Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage?
- AMustard gas
- BPropane
- CLaughing gas
- DMarsh gasCorrect
6
Secondary treatment of sewage is also called
- AFinal treatment
- BPhysical treatment
- CBiological treatmentCorrect
- DChemical treatment
7
Spirulina is a
- ABio-pesticides
- BSingle cell proteinCorrect
- CBio-fertilizers
- DEdible fungus
8
Biogas is a
- AHarmful gas
- BPoisonous gas
- CMethane rich fuelCorrect
- DGreenhouse gas
9
High value of BOD shows
- ANone of these
- BWater is normal
- CWater is less polluted
- DWater is highly pollutedCorrect
10
A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called
- APrimary treatment
- BTertiary treatment
- CCyclic treatment
- DActivated sludge treatmentCorrect