WASTEWATER CLASS B TX CORE EXAM TEST
QUESTIONS AND ANSWERS GRADED A+
✔✔On a construction job site, equipment booms must maintain at least how many feet
clearance from overhead electric lines? - ✔✔a. 10
✔✔How should trench shoring be installed? - ✔✔Two above the top of the trench
✔✔If an existing centrifugal pump motor is replaced with a motor with 20 percent more
speed, the motor horsepower required will increase by - ✔✔1.2x1.2x1.2=1.728 73
percent
✔✔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 - ✔✔if a. 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
✔✔84. One of the most important factors affecting the slope of a gravity wastewater line
is - ✔✔pipe bedding
✔✔a wastewater pipe has a slope of 4 feet in 200 feet, it is referred to as - ✔✔c. 0.02
feet per foot d. two percent
✔✔When laying bell and spigot wastewater - ✔✔trench bedding should be scooped out
at joints > support pipe on the barrel the bell end should be pointed upstream
✔✔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 - ✔✔Good listener
✔✔A 24-inch wastewater interceptor is observed to be flowing half-full at 3 fps. The
approximate volume of wastewater flowing through the line is - ✔✔3.14 x1x1x3 = 9.42 =
cfs 9.42 x 449 = 4229.58 gpm 4229.58 = 2114.79 2,115 gpm
✔✔When using a fire hydrant to flush wastewater lines, - ✔✔a. the hydrant should be
opened and closed slowly b. if flow needs to be controlled, use an external valve not the
, hydrant internal c. an air gap or backflow prevention device must be utilized d. all of the
above
✔✔A collection system that averages 1.0 mgd or more must employ . - ✔✔a. at least
one Class III Collection operator or a Class B Wastewater operator
✔✔Before making major changes in the collection system or the treatment plant,
detailed designed by a professional engineer must be submitted to TCEQ before -
✔✔beginning construction
✔✔When connecting a public water supply to any source of potential contamination, an
air gap of what size must be provided? - ✔✔two times the inlet pipe diameter
✔✔The most important purpose for wastewater treatment is - ✔✔to remove harmful
contaminants from the wastewater before it is discharged to the waters of the state
✔✔Septic wastewater has what properties? - ✔✔a. dark in color b. offensive odor e.
Jacks dissolved oxygen d. is harder treat than fresh wastewater e. all of the above
✔✔One of the requirements of the Texas Hazard Communication Act of 1985 is that the
employer must hold annual training in which the utilities' written policies and the
employee's rights are explained to - ✔✔all employees
✔✔The Federal Clean Water Act - ✔✔requires a permit for disposal of sludge requires a
permit for ocean discharges of sewer c. requires a permit for disposal or placement of
dredge material creates a national permit system for all wastewater discharge
✔✔Pretreatment of industrial waste will help minimize - ✔✔sludge contamination
interference to the treatment process safety hazards to workers discharge of industrial
pollutants in the effluent
✔✔If an employee is guilty of misconduct as defined by the utilities personnel policies,
the supervisor should - ✔✔attempt to modify the employee's behavior through training
and other forms of assistance inform the employee of the consequences if the behavior
is not modified
✔✔When fighting an electrical fire, you should - ✔✔Use non-conductive extinguishing
methods c. Use Class A or B extinguishers if electricity to the unit has been shut-off d.
Either b or e
✔✔A particular construction project has a total of 3,000 feet of 12-inch pipe, 15
manholes, 50 wastewater connections. Based upon the contract unit costs shown, if the
contractor has completed 2,000 feet of pipe, 12 manholes, and 30 wastewater
connections, what percentage of the total project has been completed?
QUESTIONS AND ANSWERS GRADED A+
✔✔On a construction job site, equipment booms must maintain at least how many feet
clearance from overhead electric lines? - ✔✔a. 10
✔✔How should trench shoring be installed? - ✔✔Two above the top of the trench
✔✔If an existing centrifugal pump motor is replaced with a motor with 20 percent more
speed, the motor horsepower required will increase by - ✔✔1.2x1.2x1.2=1.728 73
percent
✔✔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 - ✔✔if a. 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
✔✔84. One of the most important factors affecting the slope of a gravity wastewater line
is - ✔✔pipe bedding
✔✔a wastewater pipe has a slope of 4 feet in 200 feet, it is referred to as - ✔✔c. 0.02
feet per foot d. two percent
✔✔When laying bell and spigot wastewater - ✔✔trench bedding should be scooped out
at joints > support pipe on the barrel the bell end should be pointed upstream
✔✔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 - ✔✔Good listener
✔✔A 24-inch wastewater interceptor is observed to be flowing half-full at 3 fps. The
approximate volume of wastewater flowing through the line is - ✔✔3.14 x1x1x3 = 9.42 =
cfs 9.42 x 449 = 4229.58 gpm 4229.58 = 2114.79 2,115 gpm
✔✔When using a fire hydrant to flush wastewater lines, - ✔✔a. the hydrant should be
opened and closed slowly b. if flow needs to be controlled, use an external valve not the
, hydrant internal c. an air gap or backflow prevention device must be utilized d. all of the
above
✔✔A collection system that averages 1.0 mgd or more must employ . - ✔✔a. at least
one Class III Collection operator or a Class B Wastewater operator
✔✔Before making major changes in the collection system or the treatment plant,
detailed designed by a professional engineer must be submitted to TCEQ before -
✔✔beginning construction
✔✔When connecting a public water supply to any source of potential contamination, an
air gap of what size must be provided? - ✔✔two times the inlet pipe diameter
✔✔The most important purpose for wastewater treatment is - ✔✔to remove harmful
contaminants from the wastewater before it is discharged to the waters of the state
✔✔Septic wastewater has what properties? - ✔✔a. dark in color b. offensive odor e.
Jacks dissolved oxygen d. is harder treat than fresh wastewater e. all of the above
✔✔One of the requirements of the Texas Hazard Communication Act of 1985 is that the
employer must hold annual training in which the utilities' written policies and the
employee's rights are explained to - ✔✔all employees
✔✔The Federal Clean Water Act - ✔✔requires a permit for disposal of sludge requires a
permit for ocean discharges of sewer c. requires a permit for disposal or placement of
dredge material creates a national permit system for all wastewater discharge
✔✔Pretreatment of industrial waste will help minimize - ✔✔sludge contamination
interference to the treatment process safety hazards to workers discharge of industrial
pollutants in the effluent
✔✔If an employee is guilty of misconduct as defined by the utilities personnel policies,
the supervisor should - ✔✔attempt to modify the employee's behavior through training
and other forms of assistance inform the employee of the consequences if the behavior
is not modified
✔✔When fighting an electrical fire, you should - ✔✔Use non-conductive extinguishing
methods c. Use Class A or B extinguishers if electricity to the unit has been shut-off d.
Either b or e
✔✔A particular construction project has a total of 3,000 feet of 12-inch pipe, 15
manholes, 50 wastewater connections. Based upon the contract unit costs shown, if the
contractor has completed 2,000 feet of pipe, 12 manholes, and 30 wastewater
connections, what percentage of the total project has been completed?
