Question No:1
The major portion of waste water in cities and towns is ______.
[A] Household waste
[B] Industrial waste
[C] Human excreta
[D] Both (a) and (b)
Question No:2
Municipal waste water is also known as ______.
[A] Drainage
[B] Sewage
[C] Spillage
[D] Gutter
Question No:3
Sewage is treated in ______.
[A] STD
[B] STP
[C] SPT
[D] SDT
Question No:4
STP stands for:
[A] Sequential Topographical Projection
[B] Standard Test Procedure
[C] Sewage Treatment Plant
[D] None of the above
Question No:5
Which microbes help in sewage treatment?
[A] Autotrophic
[B] Heterotrophic
[C] Symbiotic
[D] Saprophytic
Question No:6
Sewage water treatment is done in how many stages?
[A] 1
[B] 3
[C] 2
[D] 4
Question No:7
Primary treatment of sewage waste involves which processes?
[A] Filtration and incubation
[B] Sedimentation and decantation
[C] Filtration and sedimentation
[D] Sedimentation and microbial proliferation
Question No:8
In sewage treatment plant, primary treatment involving removal of floating debris is done by:
[A] Vacuum filtration
[B] Pressure filtration
[C] Sequential filtration
[D] Sedimentation
Question No:9
In primary treatment of sewage water, removal of grit involves which process?
[A] Decantation
[B] Picking
[C] Filtration
[D] Sedimentation
Question No:10
In primary treatment of sewage water, after sedimentation, the solids that settle form ______.
[A] activated sludge
[B] primary sludge
[C] secondary sludge
[D] Both (a) and (c)
Question No:11
The supernatant left after sedimentation of sewage water during primary treatment is known as:
[A] Affluent
[B] Floes
[C] Sludge
[D] Effluent
Question No:12
Which of the following is transferred from primary setting tank to another tank for secondary treatment?
[A] Grit
[B] Sludge
[C] Effluent
[D] Floe
Question No:13
The secondary treatment of sewage waste is also known as ______.
[A] Chemical treatment
[B] Physical treatment
[C] Biological treatment
[D] Detoxification
Question No:14
Which of the following is used in secondary treatment of sewage water?
[A] Fermentation tanks
[B] Digester tanks
[C] Detoxification tanks
[D] Aeration tanks
Question No:15
What kind of microbes is present in ‘flocs’ formed during secondary treatment of sewage?
[A] Aerobic
[B] Anaerobic
[C] Symbiotic
[D] Aero tolerant
Microbes in Human Welfare Mock Test-4
CategoriesNEET Biology