CL447 WASTEWATER PRACTICE QUIZ QUESTIONS WITH
DETAILED VERIFIED AND 100% ACCURATE ANSWERS
Which group of bacteria best describes the breakdown of organics in an
anaerobic digester? Correct Answers fermenters
If filamentous organisms are the cause of sludge floating on the surface
of secondary clarifiers, what would be the best corrective action?
Correct Answers Increase sludge return rate
This solids treatment method maximises the reduction of moisture and
solids Correct Answers Centrifuge
When BOD levels decrease from stage to stage in a four-stage rotating
biological contactor, what starts to happen? Correct Answers
Nitrification starts
What's the possible number of kg's of sludge volatile matter produced
per kg of BOD removed a conventional plant running the activated
sludge process? Correct Answers 0.55kg
The clarity of a chlorine contact basin's effluent is considered good when
the Secchi disk can be read at a level of: Correct Answers 2m
Bacteria in an anaerobic digester will effectively utilise Correct Answers
Fats
, The most probable reason an aerobic digester has an odour problem is
that Correct Answers The supply of oxygen is insufficient.
A pond that depends on fermentation, is odorous, and is used mainly for
processing industrial wastes is classified as Correct Answers anaerobic
pond
Typically chlorine dioxide does not reaction with Correct Answers Base
metals
Approximately what percent of the dissolved solids in wastewater are
inorganics? Correct Answers 60%
Mesophilic bacteria thrive at temperatures of Correct Answers 20-42C
When looking through a microscope, an operator sees the presence of
nematodes and a predominance of rotifers from a sample collected from
an activated sludge plant. What's likely the cause? Correct Answers F/M
ratio is too low
Grit washers are used to Correct Answers remove some of the organic
matter
What type of organisms predominate in the activated sludge when the
food/microorganism (F/M) ratio is too high? Correct Answers small
Mastigophora
DETAILED VERIFIED AND 100% ACCURATE ANSWERS
Which group of bacteria best describes the breakdown of organics in an
anaerobic digester? Correct Answers fermenters
If filamentous organisms are the cause of sludge floating on the surface
of secondary clarifiers, what would be the best corrective action?
Correct Answers Increase sludge return rate
This solids treatment method maximises the reduction of moisture and
solids Correct Answers Centrifuge
When BOD levels decrease from stage to stage in a four-stage rotating
biological contactor, what starts to happen? Correct Answers
Nitrification starts
What's the possible number of kg's of sludge volatile matter produced
per kg of BOD removed a conventional plant running the activated
sludge process? Correct Answers 0.55kg
The clarity of a chlorine contact basin's effluent is considered good when
the Secchi disk can be read at a level of: Correct Answers 2m
Bacteria in an anaerobic digester will effectively utilise Correct Answers
Fats
, The most probable reason an aerobic digester has an odour problem is
that Correct Answers The supply of oxygen is insufficient.
A pond that depends on fermentation, is odorous, and is used mainly for
processing industrial wastes is classified as Correct Answers anaerobic
pond
Typically chlorine dioxide does not reaction with Correct Answers Base
metals
Approximately what percent of the dissolved solids in wastewater are
inorganics? Correct Answers 60%
Mesophilic bacteria thrive at temperatures of Correct Answers 20-42C
When looking through a microscope, an operator sees the presence of
nematodes and a predominance of rotifers from a sample collected from
an activated sludge plant. What's likely the cause? Correct Answers F/M
ratio is too low
Grit washers are used to Correct Answers remove some of the organic
matter
What type of organisms predominate in the activated sludge when the
food/microorganism (F/M) ratio is too high? Correct Answers small
Mastigophora
