CLASS A OPERATOR 2025/2026 QUESTIONS WITH
SOLUTIONS RATED A+
✔✔_______ is the last treatment step before storage. - ✔✔Disinfection
✔✔T/F: Treated water is stored at the plant in a tank called a clear well. - ✔✔True
✔✔The process of separating floc from water by gravity is called: __________ -
✔✔sedimentation
✔✔Filtration is the last barrier between the public and _______ or ________. -
✔✔giardia / cryptosporidium
✔✔T/F: If the media collects in the wash water troughs, the wash rate is too high. -
✔✔True
✔✔T/F: A check valve located on the discharge side of a pump is an isolating valve that
allows water to flow one direction only. - ✔✔False (it is a *controlling valve*)
✔✔T/F: The total dynamic head a pump must overcome is the distance from the water
level on the suction side of the pump to the top of the water level on the discharge side
of the pump and includes any friction and head loss encountered. - ✔✔True
✔✔Dead-end mains must be provided with ________ - ✔✔Flush valves
✔✔T/F: Common cross connections include a garden hose connected to a potable
water source and submerged in a stock tank, a home served by a city water supply and
private well, and a chemical container connected to a potable water supply. - ✔✔True
✔✔T/F: If a repaired main must be returned to service quickly, does with 50 mg/L for 30
minutes. - ✔✔False (*500 mg/L*)
✔✔T/F: TCEQ requires at least 1 BacT sample for each 1000 ft of new main. - ✔✔True
✔✔Pipe and fittings must not contain more than ____% lead or solder/flux containing
more than ___% lead. - ✔✔0.25%
0.2%
✔✔The _________ is TCEQ's first choice to be used for backflow prevention when
health hazards are involved. - ✔✔air gap
✔✔Service tap components usually include a tapping saddle, corporation stop, service
line tubing, curb stop, and _______. - ✔✔meter
, ✔✔T/F: A distribution system without dead ends is called an open system - ✔✔False
(looped system)
✔✔An intruder-resistant fence with lockable gates must enclose the storage site. -
✔✔True
✔✔T/F: Ground water supply systems serving more than 50 connections must have a
-ground (total) storage capacity of 200 gallons per connection and
-elevated storage capacity of 100 gallons per connection or
-pressure tank capacity of 20 gallons per connection. - ✔✔True
✔✔The system must maintain a minimum pressure of ____ psi under normal conditions
and at least _____ psi during emergencies. - ✔✔
✔✔The primary advantage of elevated storage is that pressure is ___________ when
supply pumps are off or electrical power is lost. - ✔✔maintained
✔✔Stored water can meet sudden demands such as fire, absorb pressure surges,
provide detention/contact time for ________, and allow for expansion of the distribution
system. - ✔✔chlorination
✔✔T/F: Methods of fighting corrosion include coatings, temperature adjustment, and
cathodic protection. - ✔✔False (pH adjustment, Orthophosphates, Poly-pigs)
✔✔T/F: The most common design for residential service is the positive replacement
meter. - ✔✔False
✔✔T/F: The curb stop connects the main service line and the corporation stop isolates
the meter for repair or replacement - ✔✔False (The *corporation stop* connects to the
city main and the *curb stop* is used to isolate the meter for repair)
✔✔T/F: Close a fire hydrant slowly or a water log could occur. - ✔✔False
✔✔To help safeguard against electrocution or machine injury, a safety program should
have a ___________ policy. - ✔✔lockout / tagout
✔✔Install all _______ from the top down and remove from the bottom up. - ✔✔shoring
✔✔T/F: Before digging, notify underground utilities. - ✔✔True
✔✔The Texas Hazard Communication Act requires employers to provide Safety Data
Sheets (SDS) for hazardous ______ used in the workplace. - ✔✔chemicals
SOLUTIONS RATED A+
✔✔_______ is the last treatment step before storage. - ✔✔Disinfection
✔✔T/F: Treated water is stored at the plant in a tank called a clear well. - ✔✔True
✔✔The process of separating floc from water by gravity is called: __________ -
✔✔sedimentation
✔✔Filtration is the last barrier between the public and _______ or ________. -
✔✔giardia / cryptosporidium
✔✔T/F: If the media collects in the wash water troughs, the wash rate is too high. -
✔✔True
✔✔T/F: A check valve located on the discharge side of a pump is an isolating valve that
allows water to flow one direction only. - ✔✔False (it is a *controlling valve*)
✔✔T/F: The total dynamic head a pump must overcome is the distance from the water
level on the suction side of the pump to the top of the water level on the discharge side
of the pump and includes any friction and head loss encountered. - ✔✔True
✔✔Dead-end mains must be provided with ________ - ✔✔Flush valves
✔✔T/F: Common cross connections include a garden hose connected to a potable
water source and submerged in a stock tank, a home served by a city water supply and
private well, and a chemical container connected to a potable water supply. - ✔✔True
✔✔T/F: If a repaired main must be returned to service quickly, does with 50 mg/L for 30
minutes. - ✔✔False (*500 mg/L*)
✔✔T/F: TCEQ requires at least 1 BacT sample for each 1000 ft of new main. - ✔✔True
✔✔Pipe and fittings must not contain more than ____% lead or solder/flux containing
more than ___% lead. - ✔✔0.25%
0.2%
✔✔The _________ is TCEQ's first choice to be used for backflow prevention when
health hazards are involved. - ✔✔air gap
✔✔Service tap components usually include a tapping saddle, corporation stop, service
line tubing, curb stop, and _______. - ✔✔meter
, ✔✔T/F: A distribution system without dead ends is called an open system - ✔✔False
(looped system)
✔✔An intruder-resistant fence with lockable gates must enclose the storage site. -
✔✔True
✔✔T/F: Ground water supply systems serving more than 50 connections must have a
-ground (total) storage capacity of 200 gallons per connection and
-elevated storage capacity of 100 gallons per connection or
-pressure tank capacity of 20 gallons per connection. - ✔✔True
✔✔The system must maintain a minimum pressure of ____ psi under normal conditions
and at least _____ psi during emergencies. - ✔✔
✔✔The primary advantage of elevated storage is that pressure is ___________ when
supply pumps are off or electrical power is lost. - ✔✔maintained
✔✔Stored water can meet sudden demands such as fire, absorb pressure surges,
provide detention/contact time for ________, and allow for expansion of the distribution
system. - ✔✔chlorination
✔✔T/F: Methods of fighting corrosion include coatings, temperature adjustment, and
cathodic protection. - ✔✔False (pH adjustment, Orthophosphates, Poly-pigs)
✔✔T/F: The most common design for residential service is the positive replacement
meter. - ✔✔False
✔✔T/F: The curb stop connects the main service line and the corporation stop isolates
the meter for repair or replacement - ✔✔False (The *corporation stop* connects to the
city main and the *curb stop* is used to isolate the meter for repair)
✔✔T/F: Close a fire hydrant slowly or a water log could occur. - ✔✔False
✔✔To help safeguard against electrocution or machine injury, a safety program should
have a ___________ policy. - ✔✔lockout / tagout
✔✔Install all _______ from the top down and remove from the bottom up. - ✔✔shoring
✔✔T/F: Before digging, notify underground utilities. - ✔✔True
✔✔The Texas Hazard Communication Act requires employers to provide Safety Data
Sheets (SDS) for hazardous ______ used in the workplace. - ✔✔chemicals
