Texas Wastewater Class A Actual
Exam Study Questions with Verified
Answers Already Graded A+
1. The name of the State Agency responsible for enforcing pollution control
laws in Texas - ANSWER Texas Commission of Environmental Quality
2. The term pathogenic means - ANSWER Capable of causing disease
3. What is the most important role of aerobic bacteria in the treatment of
wastewater? - ANSWER decompose organic matter
4. The hydraulic loading of a trickling filter may be determined by -
ANSWER flow rate and filter area
5. These can be used to dewater sludge - ANSWER belt press, drying beds,
solid bowl centrifuge, gravity thickener
6. Most important to providing adequate sewage treatment in a stabilization
pond - ANSWER sunlight, algae, bacteria and time
7. Offensive and objectionable odors which sometimes occur in trickling filters
usually indicate - ANSWER septic conditions are present
8. Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should
be maintained at or about - ANSWER 2 to 4 mg/L
,9. Contributes to the infiltration in a collection system - ANSWER breaks in
the main lines, high ground water levels, heavy rains, hydro jet cleaning
plugged mains
10.When a centrifuge pump loses prime the - ANSWER pump is no longer
moving liquid
11.A Rotating Biological Contactor (RBC) is - ANSWER fixed firm biological
treatment process
12.Needs to be checked regularly to properly operate an activated sludge
treatment plant - ANSWER aeration equipment and mixed liquor solids
13.Point source discharges are - ANSWER discharges that come from pipes or
ditches that are monitored, controlled and inspected
14.Non-point discharges are - ANSWER discharges that have intermittent,
dispersed flows having little or no control
15.The Texas Water Code establishes the protection of water quality and
quantity of the state by - ANSWER setting stream standards, issues permits
for discharges, identifies non-point source controls, and establishes water
reuse.
16.The wastewater plant operator is primarily responsible for - ANSWER
treating wastewater discharged into the community
,17.Chapter ___ of the Texas Water Code is the state law controlling water
pollution and ___ authority to control discharges in Texas - ANSWER
Chapter 26 and Texas Commission on Environmental Quality
18.The Texas Commission on Environmental Quality can revoke an operator's
license if the operator - ANSWER causes permit violation, falsifies records
or neglects their duty
19.If accidental discharge, bypass, or spill (SSO) of wastewater occurs the
responsible party MUST notify TCEQ regional offices within ____ hours -
ANSWER 24
20.The minimum separation between sewer lines and potable water lines is -
ANSWER 9 feet
21.A licensed wastewater operator is a professional - ANSWER consistently
does best job possible, practices personal safety, strives to improve job
knowledge, strives to keep the plant and collection system in the best
appearance and working order
22.An important step in testing a sample for Total Suspended Solids is -
ANSWER Filtering a sample
23.The Biochemical oxygen Demand (BOD) of a sample is based on -
ANSWER Measuring the dissolved oxygen (DO) used
24.The results of Biochemical Oxygen Demand (BOD) sample taken at a
treatment plant tells the operator - ANSWER How the plant was operating 5
days ago
, 25.Which of the following are dangerous gasses that are likely to be present in
lift stations and manholes? - ANSWER Natural gas, gasoline fumes,
hydrogen sulfide and carbon dioxide
26.A preferred hydraulic method of cleaning sewer lines is - ANSWER Hydro
Jet Cleaner
27.Ways to reduce bad odors coming from a collection system - ANSWER
routinely cleaning slow running or low flow lines, adding chlorine or
hydrogen peroxide to the collection system
28.Types of pipe that are commonly used in wastewater collection system -
ANSWER ductile iron, Poly Vinyl Chloride (PVC)
29.Before entering a confined space a worker should - ANSWER Use
approved monitoring device and check for the presence of dangerous gasses,
ventilate the space with a blower, wear a safety harness and attach a life line
30.A properly designed and operated primary sedimentation
tank should remove _____ percent of incoming BOD - ANSWER 30-40%
31.Devices that may be used to determine the level of sewage in a lift station -
ANSWER air bubbler, floats, electrodes, Acoustic (sonic)
32.Aerobic Bacteria require _____ in the water for their metabolism -
ANSWER oxygen
33.Anaerobic Bacteria _____ live with O2 present in the water for their
metabolism - ANSWER cannot
Exam Study Questions with Verified
Answers Already Graded A+
1. The name of the State Agency responsible for enforcing pollution control
laws in Texas - ANSWER Texas Commission of Environmental Quality
2. The term pathogenic means - ANSWER Capable of causing disease
3. What is the most important role of aerobic bacteria in the treatment of
wastewater? - ANSWER decompose organic matter
4. The hydraulic loading of a trickling filter may be determined by -
ANSWER flow rate and filter area
5. These can be used to dewater sludge - ANSWER belt press, drying beds,
solid bowl centrifuge, gravity thickener
6. Most important to providing adequate sewage treatment in a stabilization
pond - ANSWER sunlight, algae, bacteria and time
7. Offensive and objectionable odors which sometimes occur in trickling filters
usually indicate - ANSWER septic conditions are present
8. Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should
be maintained at or about - ANSWER 2 to 4 mg/L
,9. Contributes to the infiltration in a collection system - ANSWER breaks in
the main lines, high ground water levels, heavy rains, hydro jet cleaning
plugged mains
10.When a centrifuge pump loses prime the - ANSWER pump is no longer
moving liquid
11.A Rotating Biological Contactor (RBC) is - ANSWER fixed firm biological
treatment process
12.Needs to be checked regularly to properly operate an activated sludge
treatment plant - ANSWER aeration equipment and mixed liquor solids
13.Point source discharges are - ANSWER discharges that come from pipes or
ditches that are monitored, controlled and inspected
14.Non-point discharges are - ANSWER discharges that have intermittent,
dispersed flows having little or no control
15.The Texas Water Code establishes the protection of water quality and
quantity of the state by - ANSWER setting stream standards, issues permits
for discharges, identifies non-point source controls, and establishes water
reuse.
16.The wastewater plant operator is primarily responsible for - ANSWER
treating wastewater discharged into the community
,17.Chapter ___ of the Texas Water Code is the state law controlling water
pollution and ___ authority to control discharges in Texas - ANSWER
Chapter 26 and Texas Commission on Environmental Quality
18.The Texas Commission on Environmental Quality can revoke an operator's
license if the operator - ANSWER causes permit violation, falsifies records
or neglects their duty
19.If accidental discharge, bypass, or spill (SSO) of wastewater occurs the
responsible party MUST notify TCEQ regional offices within ____ hours -
ANSWER 24
20.The minimum separation between sewer lines and potable water lines is -
ANSWER 9 feet
21.A licensed wastewater operator is a professional - ANSWER consistently
does best job possible, practices personal safety, strives to improve job
knowledge, strives to keep the plant and collection system in the best
appearance and working order
22.An important step in testing a sample for Total Suspended Solids is -
ANSWER Filtering a sample
23.The Biochemical oxygen Demand (BOD) of a sample is based on -
ANSWER Measuring the dissolved oxygen (DO) used
24.The results of Biochemical Oxygen Demand (BOD) sample taken at a
treatment plant tells the operator - ANSWER How the plant was operating 5
days ago
, 25.Which of the following are dangerous gasses that are likely to be present in
lift stations and manholes? - ANSWER Natural gas, gasoline fumes,
hydrogen sulfide and carbon dioxide
26.A preferred hydraulic method of cleaning sewer lines is - ANSWER Hydro
Jet Cleaner
27.Ways to reduce bad odors coming from a collection system - ANSWER
routinely cleaning slow running or low flow lines, adding chlorine or
hydrogen peroxide to the collection system
28.Types of pipe that are commonly used in wastewater collection system -
ANSWER ductile iron, Poly Vinyl Chloride (PVC)
29.Before entering a confined space a worker should - ANSWER Use
approved monitoring device and check for the presence of dangerous gasses,
ventilate the space with a blower, wear a safety harness and attach a life line
30.A properly designed and operated primary sedimentation
tank should remove _____ percent of incoming BOD - ANSWER 30-40%
31.Devices that may be used to determine the level of sewage in a lift station -
ANSWER air bubbler, floats, electrodes, Acoustic (sonic)
32.Aerobic Bacteria require _____ in the water for their metabolism -
ANSWER oxygen
33.Anaerobic Bacteria _____ live with O2 present in the water for their
metabolism - ANSWER cannot
