TX Class C Wastewater Treatment License Exam ||
Most Recent Exam 2026-2027 Actual Complete Real
Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed
Success!! Newest Exam | Just Released!!
What factors affect biological growth? - ANSWER -
dissolved oxygen level,
temperature, pH and
available food
What is the most important microorganism in wastewater
treatment? - ANSWER
-
bacteria
In what ways are bacteria classified? - ANSWER -shape,
oxygen needs,
temperature and
metabolism
In the removal process, what must bacteria do? - ANSWER -
gather food, digest
food, utilize food and give off by-
products
,What limiting factors affect bacteria growth? - ANSWER -
pH, temperature,
moisture and
food
What must the operator control in order for microorganisms
to do their job? -
ANSWER -the
environment
What by-products are excreted by microorganisms? - ANSWER
-CO2, H2O and
NH3 and
polysaccharides
Treatment pond classifications are... - ANSWER -wastewater
stabilization ponds, aerated lagoons, facultative lagoons,
anaerobic lagoons and hyacinth ponds
What will a wastewater stabilization pond effectively reduce? -
ANSWER -BOD
and
bacteria
Advanced treatment processes strive to provide a
______________ removal level of specific compounds,
suspended solids, and oxygen-demanding materials than
cannot be achieved through secondary treatment alone. -
ANSWER -higher
,Direct filtration of secondary effluent is often used to reduce
_____ solids to low
levels. - ANSWER –
suspended
The most important factor affecting filter performance is
the _____ of the
secondary effluent applied to the filter. -
ANSWER –quality
Proper __________ is essential to filter performance. - ANSWER
-cleaning
What is the absorbent most commonly used for water
treatment? - ANSWER -
Activated
carbon
The use of granular activated carbon (GAC) for
______________ removal is
common. - ANSWER -
organic
What can cause problems in granular activated carbon
(GAC) treatment? -
ANSWER -biological
growth
, What has been tried as oxidizing agents in wastewater
treatment? - ANSWER -
chlorine dioxide
(ClO2)
Ozone
(O3)
Chlorine
(Cl2)
Many over look what kind of oxidizing agent as an oxidant
because of its
relative ineffectiveness in conventional waste treatment? -
ANSWER –ozone
Laboratory-scale studies have shown that the changes
occurring in the settlement of the floc are greatly influenced by
what? - ANSWER -biological activity
What is a common coagulant used for chemical
precipitation? - ANSWER -
aluminum sulfate; sodium aluminate and
ferric sulfate
What occurs when solutions of two different concentrations are
separated by a
semipermeable membrane such as cellophane? -
ANSWER -osmosis
Most Recent Exam 2026-2027 Actual Complete Real
Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed
Success!! Newest Exam | Just Released!!
What factors affect biological growth? - ANSWER -
dissolved oxygen level,
temperature, pH and
available food
What is the most important microorganism in wastewater
treatment? - ANSWER
-
bacteria
In what ways are bacteria classified? - ANSWER -shape,
oxygen needs,
temperature and
metabolism
In the removal process, what must bacteria do? - ANSWER -
gather food, digest
food, utilize food and give off by-
products
,What limiting factors affect bacteria growth? - ANSWER -
pH, temperature,
moisture and
food
What must the operator control in order for microorganisms
to do their job? -
ANSWER -the
environment
What by-products are excreted by microorganisms? - ANSWER
-CO2, H2O and
NH3 and
polysaccharides
Treatment pond classifications are... - ANSWER -wastewater
stabilization ponds, aerated lagoons, facultative lagoons,
anaerobic lagoons and hyacinth ponds
What will a wastewater stabilization pond effectively reduce? -
ANSWER -BOD
and
bacteria
Advanced treatment processes strive to provide a
______________ removal level of specific compounds,
suspended solids, and oxygen-demanding materials than
cannot be achieved through secondary treatment alone. -
ANSWER -higher
,Direct filtration of secondary effluent is often used to reduce
_____ solids to low
levels. - ANSWER –
suspended
The most important factor affecting filter performance is
the _____ of the
secondary effluent applied to the filter. -
ANSWER –quality
Proper __________ is essential to filter performance. - ANSWER
-cleaning
What is the absorbent most commonly used for water
treatment? - ANSWER -
Activated
carbon
The use of granular activated carbon (GAC) for
______________ removal is
common. - ANSWER -
organic
What can cause problems in granular activated carbon
(GAC) treatment? -
ANSWER -biological
growth
, What has been tried as oxidizing agents in wastewater
treatment? - ANSWER -
chlorine dioxide
(ClO2)
Ozone
(O3)
Chlorine
(Cl2)
Many over look what kind of oxidizing agent as an oxidant
because of its
relative ineffectiveness in conventional waste treatment? -
ANSWER –ozone
Laboratory-scale studies have shown that the changes
occurring in the settlement of the floc are greatly influenced by
what? - ANSWER -biological activity
What is a common coagulant used for chemical
precipitation? - ANSWER -
aluminum sulfate; sodium aluminate and
ferric sulfate
What occurs when solutions of two different concentrations are
separated by a
semipermeable membrane such as cellophane? -
ANSWER -osmosis
