WorksheetsA348-P11
Total questions: 10
Worksheet time: 5mins
What is the condition for the wastewater in a pond has net negative?
Aerobic
Anaerobic
Fermentation
None of these
BOD is
Bio-logical Oxygen demand
Bio-Chemical oxygen Demand
Both a and b
none of this
BOD reaction is taking place at
20oC
250C
350C
none of these
The expression of p in BOD equation is
p= total volume of solution
p = volume of waste water
p = volume of waste water / total volume
none of these
BOD reaction is taking place in dark
to prevent photo-sensitive reaction
to prevent production of free radicals
to prevent reduction
both a and b
In BOD reaction, stoppered bottle is used to prevent
light
for mixing oxygen from air
to stop evaporation of solution
none of these
What is a Facultative pond?
Top layer is anaerobic
Bottom layer is aerobic
Aerobic throughout depth
Top layer is aerobic
What stabilizes organic waste in the supernatant layer of the facultative pond?
Bacteria and Algae
Bacteria
Algae
None of these
Which of the following is not stabilization ponds?
Anaerobic
Facultative
Maturation
Aerobic
Facultative bacteria are able to work in
Presence Of Oxygen Only
Absence Of Oxygen Only
Presence As Well As In Absence Of Oxygen
Presence Of Water
