TEXAS WASTEWATER CLASS A TEST NEWEST 2025 WITH
QUESTIONS AND DETAILED CORRECT ANSWERS
A+GRADED
Which process is more like an oxidation pond? - CORRECT ANSWER Extended
aeration
Carbon dioxide does not harm - CORRECT ANSWER mucous membranes or your
lungs
What meter measures resistance? - CORRECT ANSWER Ohm meter
What are the limits of authority for a line manager position? - CORRECT ANSWER
Supervises their subordinates only
What is the "Span of Supervision?" - CORRECT ANSWER The number of subordinates
that you supervise.
How often should maintenance be scheduled? - CORRECT ANSWER Daily
When a centrifugal blower is operating what happens to the oil level? - CORRECT
ANSWER It drops
Excessive "Hum" in a motor indicates what? - CORRECT ANSWER Single Phase
Seeding of BOD samples is necessary when samples _______. - CORRECT ANSWER
to be tested contains materials not readily biodegradable, or if it contains toxic materials
such as phenol, formaldehyde or similar microbe.
If an existing centrifugal pump motor is replaced with a motor with 25 percent more
speed, the motor horsepower required will increase by ________. - CORRECT
ANSWER
The sludge from a primary clarifier should contain what percent solids? - CORRECT
ANSWER 4 to 6 %
According to 30 TAC Chapter 317, all pipe and fittings used in wastewater pressure
mains shall have a minimum psi pressure rating of ________. - CORRECT ANSWER
Carbon monoxide (CO) poisoning symptoms are ________. - CORRECT ANSWER
When setting work goals for an employee, the goals should be ________. - CORRECT
ANSWER
, As the population of a collection system increases, the ratio of peak flow to average
daily flow will - CORRECT ANSWER decrease
Pre- aeration of influent would aid in - CORRECT ANSWER flotation of grease
In a normally operating trickling filter, the temperature difference between the
atmosphere and the influent wastewater will - CORRECT ANSWER cause air to flow
through the media and across the zoogleal mass
Frequency of TCLP monitoring, for dry metric tons of sludge disposed of - CORRECT
ANSWER 0 to 290, once per year,
290 to 1,500, once per quarter,
1,500 to 15,000, once per 60 days.
15,000 monthly.
Essay: List and explain the functionality/role
of each float for a lift station that has
2 pumps and 4 floats installed? - CORRECT ANSWER
Essay: Explain the 5 major mechanical components of an activated sludge system? -
CORRECT ANSWER
Essay: Explain the advantages and disadvantages (or differences) between an
oxidation ditch and activated sludge system? - CORRECT ANSWER
Essay: What are the 6 major components of a Sewer System Evaluation Survey
(SSES)? - CORRECT ANSWER
What is the purpose, of a sanitary sewer, evaluation survey - CORRECT ANSWER A
sewer system evaluation survey, is a systematic evaluation, used to investigate reports
of excessive inflow, or infiltration sources, in a sewer system? The survey also
assesses the flow rate, and the cost for rehabilitation, if said sources, are found to be
excessive
Advantage of wastewater stabilization ponds - CORRECT ANSWER low-cost
technology, requires low maintenance, is highly efficient, mostly natural and
sustainable.
What removes Total Suspended Solids from a sample (TSS) - CORRECT ANSWER
filtration
What chapter of the Texas Water Code gives T C E Q authority to control discharges in
Texas? - CORRECT ANSWER Chapter 26
Inorganic solids include - CORRECT ANSWER sand, grit and minerals
QUESTIONS AND DETAILED CORRECT ANSWERS
A+GRADED
Which process is more like an oxidation pond? - CORRECT ANSWER Extended
aeration
Carbon dioxide does not harm - CORRECT ANSWER mucous membranes or your
lungs
What meter measures resistance? - CORRECT ANSWER Ohm meter
What are the limits of authority for a line manager position? - CORRECT ANSWER
Supervises their subordinates only
What is the "Span of Supervision?" - CORRECT ANSWER The number of subordinates
that you supervise.
How often should maintenance be scheduled? - CORRECT ANSWER Daily
When a centrifugal blower is operating what happens to the oil level? - CORRECT
ANSWER It drops
Excessive "Hum" in a motor indicates what? - CORRECT ANSWER Single Phase
Seeding of BOD samples is necessary when samples _______. - CORRECT ANSWER
to be tested contains materials not readily biodegradable, or if it contains toxic materials
such as phenol, formaldehyde or similar microbe.
If an existing centrifugal pump motor is replaced with a motor with 25 percent more
speed, the motor horsepower required will increase by ________. - CORRECT
ANSWER
The sludge from a primary clarifier should contain what percent solids? - CORRECT
ANSWER 4 to 6 %
According to 30 TAC Chapter 317, all pipe and fittings used in wastewater pressure
mains shall have a minimum psi pressure rating of ________. - CORRECT ANSWER
Carbon monoxide (CO) poisoning symptoms are ________. - CORRECT ANSWER
When setting work goals for an employee, the goals should be ________. - CORRECT
ANSWER
, As the population of a collection system increases, the ratio of peak flow to average
daily flow will - CORRECT ANSWER decrease
Pre- aeration of influent would aid in - CORRECT ANSWER flotation of grease
In a normally operating trickling filter, the temperature difference between the
atmosphere and the influent wastewater will - CORRECT ANSWER cause air to flow
through the media and across the zoogleal mass
Frequency of TCLP monitoring, for dry metric tons of sludge disposed of - CORRECT
ANSWER 0 to 290, once per year,
290 to 1,500, once per quarter,
1,500 to 15,000, once per 60 days.
15,000 monthly.
Essay: List and explain the functionality/role
of each float for a lift station that has
2 pumps and 4 floats installed? - CORRECT ANSWER
Essay: Explain the 5 major mechanical components of an activated sludge system? -
CORRECT ANSWER
Essay: Explain the advantages and disadvantages (or differences) between an
oxidation ditch and activated sludge system? - CORRECT ANSWER
Essay: What are the 6 major components of a Sewer System Evaluation Survey
(SSES)? - CORRECT ANSWER
What is the purpose, of a sanitary sewer, evaluation survey - CORRECT ANSWER A
sewer system evaluation survey, is a systematic evaluation, used to investigate reports
of excessive inflow, or infiltration sources, in a sewer system? The survey also
assesses the flow rate, and the cost for rehabilitation, if said sources, are found to be
excessive
Advantage of wastewater stabilization ponds - CORRECT ANSWER low-cost
technology, requires low maintenance, is highly efficient, mostly natural and
sustainable.
What removes Total Suspended Solids from a sample (TSS) - CORRECT ANSWER
filtration
What chapter of the Texas Water Code gives T C E Q authority to control discharges in
Texas? - CORRECT ANSWER Chapter 26
Inorganic solids include - CORRECT ANSWER sand, grit and minerals
