WASTEWATER CLASS B TX 2026 STUDY GUIDE
QUESTIONS AND ANSWERS GRADED A+
✔✔At a construction job site, as the roadway speed increases, the spacing between
cones and barricades should - ✔✔increase
✔✔The major cause of wastewater line stoppages is - ✔✔roots and grease
✔✔Carbon monoxide (CO) poisoning symptoms are - ✔✔tightness in the chest nausea
drowsiness and headache (all of the above)
✔✔The smallest pipe size for air recirculation of a self-priming centrifugal pump is -
✔✔1 inch
✔✔Dangerous gases in a confined space may not be detected with the physical senses
because - ✔✔some gases have no odor some gases may deaden the sense of smell
some gases may displace the oxygen (all of the above)
✔✔What are the dangerous gases a collection system worker might come into contact
with? - ✔✔CO2 CO НaS CH4 (all of the above)
✔✔On a construction job site, equipment booms must maintain at least how many feet
of clearance from overhead electric lines? - ✔✔10
✔✔How should trench shoring be installed? - ✔✔to above the top of the trench
✔✔When setting work goals for an employee, the goals should be - ✔✔accompanied by
an action plan
✔✔According to Chapter 317, Design Criteria, a manhole can be installed within 9 feet
of an existing waterline if - ✔✔the manhole is completely watertight and tested for no
leakage
✔✔As the population of a collection system increases, the ratio of peak flow to average
daily flow will - ✔✔decrease
✔✔Motivating workers to do a better job is best done by - ✔✔letting workers participate
in setting goals
✔✔One important element of a good communicator is - ✔✔being a good listener
✔✔Monitoring and reporting records of a wastewater treatment plant shall be kept at the
facility site for a period of - ✔✔d. three years
, ✔✔The TCEQ Design Criteria requires that deflection tests be performed on all new
installed flexible or semi-rigid pipe after the final backfill has been in place for 30 days.
This deflection test is usually performed using a rigid ball or mandrel that has a diameter
equal to -percent of the inside diameter of the pipe. - ✔✔c. 95
✔✔Seeding of BOD samples is necessary when samples - ✔✔e. all of the above
✔✔A one-cylinder reciprocating sludge pump with a 10-inch bore and a 5-inch stroke
pumps at rate of 50 cycles per minute. How many minutes must the pump be operated
to pump 5,000 gallons of sludge? - ✔✔3.14 x0.416 x0.416 x0.416 x 50x7.48 = 84.5 gpm
5000 gal = 59.2min 84.5 gpm d. 60 minutes e.
✔✔When is blue-green algae the most dominant on a pond treatment system? -
✔✔Summer
✔✔What is the purpose of biomonitoring of a plant's effluent? - ✔✔d. Test for toxicity
✔✔Technology The management function of selecting and training employees of an
organization is called - ✔✔staffing
✔✔e. controlling When must TCEQ be notified about expansions of a treatment facility?
- ✔✔Before construction
✔✔In an anaerobic digester, the percentage of methane and carbon dioxide gas
content should be - ✔✔b. 70% methane, 30% carbon dioxide
✔✔The temperature of an anaerobic digester should be maintained at a minimum of -
✔✔95° F
✔✔13. What type of wastewater treatment operates in the endogenous bacteria growth
phase? - ✔✔Extended air
✔✔Why is recirculation needed in a trickling filter? - ✔✔a. Keep the media wet b.
Further reduce BOD c. Flood the filter to control ponding and filter flies
✔✔15. What type of fire extinguisher would be used on an electrical control panel that
has been de-energized? - ✔✔f. a class a and d class c
✔✔Disinfection with chlorine is the most effective at a pH of - ✔✔6.0
✔✔17. The biomass on a normal functioning RBC has what appearance? - ✔✔Grey to
brown and 0.05 to 0.1 inch thick
QUESTIONS AND ANSWERS GRADED A+
✔✔At a construction job site, as the roadway speed increases, the spacing between
cones and barricades should - ✔✔increase
✔✔The major cause of wastewater line stoppages is - ✔✔roots and grease
✔✔Carbon monoxide (CO) poisoning symptoms are - ✔✔tightness in the chest nausea
drowsiness and headache (all of the above)
✔✔The smallest pipe size for air recirculation of a self-priming centrifugal pump is -
✔✔1 inch
✔✔Dangerous gases in a confined space may not be detected with the physical senses
because - ✔✔some gases have no odor some gases may deaden the sense of smell
some gases may displace the oxygen (all of the above)
✔✔What are the dangerous gases a collection system worker might come into contact
with? - ✔✔CO2 CO НaS CH4 (all of the above)
✔✔On a construction job site, equipment booms must maintain at least how many feet
of clearance from overhead electric lines? - ✔✔10
✔✔How should trench shoring be installed? - ✔✔to above the top of the trench
✔✔When setting work goals for an employee, the goals should be - ✔✔accompanied by
an action plan
✔✔According to Chapter 317, Design Criteria, a manhole can be installed within 9 feet
of an existing waterline if - ✔✔the manhole is completely watertight and tested for no
leakage
✔✔As the population of a collection system increases, the ratio of peak flow to average
daily flow will - ✔✔decrease
✔✔Motivating workers to do a better job is best done by - ✔✔letting workers participate
in setting goals
✔✔One important element of a good communicator is - ✔✔being a good listener
✔✔Monitoring and reporting records of a wastewater treatment plant shall be kept at the
facility site for a period of - ✔✔d. three years
, ✔✔The TCEQ Design Criteria requires that deflection tests be performed on all new
installed flexible or semi-rigid pipe after the final backfill has been in place for 30 days.
This deflection test is usually performed using a rigid ball or mandrel that has a diameter
equal to -percent of the inside diameter of the pipe. - ✔✔c. 95
✔✔Seeding of BOD samples is necessary when samples - ✔✔e. all of the above
✔✔A one-cylinder reciprocating sludge pump with a 10-inch bore and a 5-inch stroke
pumps at rate of 50 cycles per minute. How many minutes must the pump be operated
to pump 5,000 gallons of sludge? - ✔✔3.14 x0.416 x0.416 x0.416 x 50x7.48 = 84.5 gpm
5000 gal = 59.2min 84.5 gpm d. 60 minutes e.
✔✔When is blue-green algae the most dominant on a pond treatment system? -
✔✔Summer
✔✔What is the purpose of biomonitoring of a plant's effluent? - ✔✔d. Test for toxicity
✔✔Technology The management function of selecting and training employees of an
organization is called - ✔✔staffing
✔✔e. controlling When must TCEQ be notified about expansions of a treatment facility?
- ✔✔Before construction
✔✔In an anaerobic digester, the percentage of methane and carbon dioxide gas
content should be - ✔✔b. 70% methane, 30% carbon dioxide
✔✔The temperature of an anaerobic digester should be maintained at a minimum of -
✔✔95° F
✔✔13. What type of wastewater treatment operates in the endogenous bacteria growth
phase? - ✔✔Extended air
✔✔Why is recirculation needed in a trickling filter? - ✔✔a. Keep the media wet b.
Further reduce BOD c. Flood the filter to control ponding and filter flies
✔✔15. What type of fire extinguisher would be used on an electrical control panel that
has been de-energized? - ✔✔f. a class a and d class c
✔✔Disinfection with chlorine is the most effective at a pH of - ✔✔6.0
✔✔17. The biomass on a normal functioning RBC has what appearance? - ✔✔Grey to
brown and 0.05 to 0.1 inch thick
