ABC WASTEWATER {OTCO} MID-TERM Verified Multiple Choice and Conceptual Actual
Frequently Tested Exam Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
blank is the primary objective of treating a community's
wastewater, but is no longer the sole objective of the Preventing disease
treatment facilities.
Anaerobic bacteria remove the oxygen from sulfur com-
What mechanism produces hydrogen sulfide?
ponents.
blank are the last line of defense for our all-important
Treatment plants
water resources?
We only have a finite amount of water so we must reuse
Why is it necessary to treat wastewater?
what we have.
The hydraulic profile is a description of how the liquid
What is a hydraulic profile?
flows through the plant process.
Disease causing organisms are called: Pathogens
The most important item to be considered in sensing
Good Housekeeping
meter maintenance is;
blank should be pumped from the clarifier sump and
should be as thick as possible with the least amount of Sludge
water?
When can a higher than average amount of grit be ex- During high flow events caused by high ground water or
pected at a plant? storms.
What process keeps the lighter organics in suspension,
Aerated grit removal systems
freshens wastewater, and produces a well washed grit?
What is the metabolic process that is similar to the activat-
ed sludge process in that the population of microorgan- Fixed film
isms treats the wastes?
A test that provides the relative measure of the amount
of food available to the biological system, the degree
Biochemical oxygen demand
of stabilization of the wastewater, and the ettect of the
effluent on the receiving stream is called:
What is a representative sample? 1/5
, A volume of water that accurately represents the larger
stream you are sampling
What is the first classification of treatment process found
Preliminary treatment
in a wastewater plant?
Which treatment process removes settling and floating
Primary treatment
materials?
Which system provides an even flow of wastewater across
the entire area of a trickling filter and ensures uniform Distribution
media wetting and proper aeration?
In preliminary treatment, debris may plug pumps, or jam
Primary clarifiers
sludge collection mechanisms in:
A condition that can cause pitting of the impeller, a ping-
ing noise in the pump, and a reduction in output is known Cavitation
as:
The most common type of pump used in wastewater is a: Centrifugal pump
On a pump curve, as the head blank, output blank. Increases, decreases
Before starting a circular clarifier, why should operators
There may be debris or obstructions.
check the tank sumps or hopers and return lines?
What should be the velocity in a grit chamber? 0.7 to 1.4 feet per second
blank loading rate and detention time vary widely
throughout the day due to the hourly changes in the Surface
inflow to the plant?
What devices function combines the functions of a screen
Communitor
and a grinder?
In a trickling filter, liquid waste runs over the media, the
slime either falls ott or is washed ott. What is this process Sloughing
called?
2/5
Frequently Tested Exam Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
blank is the primary objective of treating a community's
wastewater, but is no longer the sole objective of the Preventing disease
treatment facilities.
Anaerobic bacteria remove the oxygen from sulfur com-
What mechanism produces hydrogen sulfide?
ponents.
blank are the last line of defense for our all-important
Treatment plants
water resources?
We only have a finite amount of water so we must reuse
Why is it necessary to treat wastewater?
what we have.
The hydraulic profile is a description of how the liquid
What is a hydraulic profile?
flows through the plant process.
Disease causing organisms are called: Pathogens
The most important item to be considered in sensing
Good Housekeeping
meter maintenance is;
blank should be pumped from the clarifier sump and
should be as thick as possible with the least amount of Sludge
water?
When can a higher than average amount of grit be ex- During high flow events caused by high ground water or
pected at a plant? storms.
What process keeps the lighter organics in suspension,
Aerated grit removal systems
freshens wastewater, and produces a well washed grit?
What is the metabolic process that is similar to the activat-
ed sludge process in that the population of microorgan- Fixed film
isms treats the wastes?
A test that provides the relative measure of the amount
of food available to the biological system, the degree
Biochemical oxygen demand
of stabilization of the wastewater, and the ettect of the
effluent on the receiving stream is called:
What is a representative sample? 1/5
, A volume of water that accurately represents the larger
stream you are sampling
What is the first classification of treatment process found
Preliminary treatment
in a wastewater plant?
Which treatment process removes settling and floating
Primary treatment
materials?
Which system provides an even flow of wastewater across
the entire area of a trickling filter and ensures uniform Distribution
media wetting and proper aeration?
In preliminary treatment, debris may plug pumps, or jam
Primary clarifiers
sludge collection mechanisms in:
A condition that can cause pitting of the impeller, a ping-
ing noise in the pump, and a reduction in output is known Cavitation
as:
The most common type of pump used in wastewater is a: Centrifugal pump
On a pump curve, as the head blank, output blank. Increases, decreases
Before starting a circular clarifier, why should operators
There may be debris or obstructions.
check the tank sumps or hopers and return lines?
What should be the velocity in a grit chamber? 0.7 to 1.4 feet per second
blank loading rate and detention time vary widely
throughout the day due to the hourly changes in the Surface
inflow to the plant?
What devices function combines the functions of a screen
Communitor
and a grinder?
In a trickling filter, liquid waste runs over the media, the
slime either falls ott or is washed ott. What is this process Sloughing
called?
2/5
