TEXAS WASTEWATER CLASS D NEWEST ACTUAL EXAM
The name of the State Agency responsible for enforcing pollution control laws in
Texas is -
a. Texas Water Development Board
b. Texas Water Commission
c. Texas Section of EPA
d. Texas Commission on Environmental Quality
e. Texas Water Resource and Conservation Commission - ANSWER: D
The term "pathogen" means -
a. Aerobic Bacteria
b. Anaerobic Bacteria
c. Fecal Matter
d. Coliform Bacteria
e. Disease Causing - ANSWER: E
The minimum separation between sewer lines and potable water lines is -
a. 5 feet
b. 7 feet
c. 9 feet
d. 11 feet
e. 24 feet - ANSWER: C
A licensed wastewater operator is a professional who -
a. Consistently does the best job possible
b. Practices personal safety
c. Strives to improve job knowledge
d. Strives to keep the plant and collection system in the best appearance and
working order
e. All of the above - ANSWER: E
The Biochemical Oxygen Demand (BOD) of a sample is based on -
a. pH readings
b. Measuring Total Suspended Solids (TSS) of a sample
c. Measuring the Dissolved Oxygen (DO) used
d. Measuring the anaerobic decomposition
e. Measuring total detention time - ANSWER: C
What is the most important role of aerobic bacteria in the treatment of wastewater?
a. Enhance organic matter
b. Decompose organic matter
c. Introduce workers to dangerous diseases
d. Enhance oxygen production
e. Produces Odor and Offensive Smells - ANSWER: B
, Which of the following are dangerous gases that are likely to be present in lift
stations and or manholes?
a. Methane gas and Petroleum fumes
b. Hydrogen Sulfide and Carbon Dioxide
c. Hydrogen, Sulfur, and Argon
d. Oxygen, Nitrogen, and Helium
e. Both a & b - ANSWER: E
A preferred and most common method of cleaning sewer lines is -
a. Cable & Auger
b. Continuous Roding Machine
c. Hydro Jet Cleaner
d. Bucket & Belt Press
e. Both a & d - ANSWER: C
Which of the following are ways to reduce bad odors coming from a collection
system?
a. Aeration & Air Scrubbers
b. Adding Enzymes To The Collection System
c. Routinely cleaning slow running or low flow lines
d. Adding Chlorine or Hydrogen Peroxide to the Collection System
e. Both c & d - ANSWER: E
The results of a Biochemical Oxygen Demand (BOD) sample taken at a treatment
plant tells the operator -
a. How the plant is currently operating
b. How the plant was operating 5 days ago
c. How the plant was operating 10 days ago
d. Is of little benefit to the operator
e. How the plant will be performing at TCEQ inspection time - ANSWER: B
Which of the following would contribute to infiltration in a collection system?
a. Breaks in the main lined
b. High ground water levels
c. Heavy rains
d. Hydro jet cleaning plugged mains
e. a, b, & c - ANSWER: E
When a centrifugal pump loses prime, which of the following is most likely to result?
a. Pump sounds as though it is pumping gravel
b. Pump is no longer moving liquid
c. Check valve on the suction side of the pump slams closed
D. RPM of motor increases to compensate
e. a, b, & c - ANSWER: B
An operator's flow meter at the plant indicates there was 2.6 MGD flow through the
plant. What is the GPM?
The name of the State Agency responsible for enforcing pollution control laws in
Texas is -
a. Texas Water Development Board
b. Texas Water Commission
c. Texas Section of EPA
d. Texas Commission on Environmental Quality
e. Texas Water Resource and Conservation Commission - ANSWER: D
The term "pathogen" means -
a. Aerobic Bacteria
b. Anaerobic Bacteria
c. Fecal Matter
d. Coliform Bacteria
e. Disease Causing - ANSWER: E
The minimum separation between sewer lines and potable water lines is -
a. 5 feet
b. 7 feet
c. 9 feet
d. 11 feet
e. 24 feet - ANSWER: C
A licensed wastewater operator is a professional who -
a. Consistently does the best job possible
b. Practices personal safety
c. Strives to improve job knowledge
d. Strives to keep the plant and collection system in the best appearance and
working order
e. All of the above - ANSWER: E
The Biochemical Oxygen Demand (BOD) of a sample is based on -
a. pH readings
b. Measuring Total Suspended Solids (TSS) of a sample
c. Measuring the Dissolved Oxygen (DO) used
d. Measuring the anaerobic decomposition
e. Measuring total detention time - ANSWER: C
What is the most important role of aerobic bacteria in the treatment of wastewater?
a. Enhance organic matter
b. Decompose organic matter
c. Introduce workers to dangerous diseases
d. Enhance oxygen production
e. Produces Odor and Offensive Smells - ANSWER: B
, Which of the following are dangerous gases that are likely to be present in lift
stations and or manholes?
a. Methane gas and Petroleum fumes
b. Hydrogen Sulfide and Carbon Dioxide
c. Hydrogen, Sulfur, and Argon
d. Oxygen, Nitrogen, and Helium
e. Both a & b - ANSWER: E
A preferred and most common method of cleaning sewer lines is -
a. Cable & Auger
b. Continuous Roding Machine
c. Hydro Jet Cleaner
d. Bucket & Belt Press
e. Both a & d - ANSWER: C
Which of the following are ways to reduce bad odors coming from a collection
system?
a. Aeration & Air Scrubbers
b. Adding Enzymes To The Collection System
c. Routinely cleaning slow running or low flow lines
d. Adding Chlorine or Hydrogen Peroxide to the Collection System
e. Both c & d - ANSWER: E
The results of a Biochemical Oxygen Demand (BOD) sample taken at a treatment
plant tells the operator -
a. How the plant is currently operating
b. How the plant was operating 5 days ago
c. How the plant was operating 10 days ago
d. Is of little benefit to the operator
e. How the plant will be performing at TCEQ inspection time - ANSWER: B
Which of the following would contribute to infiltration in a collection system?
a. Breaks in the main lined
b. High ground water levels
c. Heavy rains
d. Hydro jet cleaning plugged mains
e. a, b, & c - ANSWER: E
When a centrifugal pump loses prime, which of the following is most likely to result?
a. Pump sounds as though it is pumping gravel
b. Pump is no longer moving liquid
c. Check valve on the suction side of the pump slams closed
D. RPM of motor increases to compensate
e. a, b, & c - ANSWER: B
An operator's flow meter at the plant indicates there was 2.6 MGD flow through the
plant. What is the GPM?
