Texas Class C water license Questions
and Complete Solutions Graded A+
True or False The following are all components of the distribution system : pumps and motors , valves
and hydrants , water mains and piping , service lines and meters , and various types of storage tanks . -
Answer: True.
True or False ) The distribution system should be designed so that it can provide continuous delivery of a
sufficient volume of potable and palatable water regardless of the amount of pressure present . -
Answer: False
True or False : The TCEQ is the state agency that has primacy responsibilities in regulating public drinking
water systems in Texas . - Answer: True
True or False The TCEQ has established maximum capacity requirements that all public water systems
must meet which include storage pump stations , and water main sizes . - Answer: False
True or False ) Palatable water is safe to drink , and potable water is unsafe to drink . Circle the letter of
the best answer - Answer: False
Water from surface water sources would be creeks ,______, streams , impounded water , and the
oceans . - Answer: Rivers
Water from groundwater sources would be drawn from a________ , an artesian well , or an aquifer . -
Answer: Water table
An example of a public customer is : - Answer: a water/ wastewater treatment plant
An operator's license can be revoked for : - Answer: neglecting duties or falsifying records and cheating
on a state licensing exam
,Under normal conditions , the system and operators should maintain an operating pressure of ______
pounds per square inch - Answer: 35psi
At what location in the system should the correct pressure especially be maintained ? - Answer: at the
meter at the highest elevation.
What qualifications are necessary to become a licensed operator ? - Answer: high school education or
GED meet the experience requirements have taken the required courses and total necessary hours
passed a TCEQ administered exam
The system shall maintain a minimum pressure ( ) of psi during firefighting , line flushing , peak demand ,
and other unusual conditions . - Answer: 20psi
During a natural disaster , if the system is unable to maintain the required minimum pressure , they
have 180 days to submit a revised emergency preparedness plan . When does the 180 - day period begin
? - Answer: when normal power is restored
Potable water is defined as water used for - Answer: human consumption, preparing food drinking
water, all of the above.
Palatable water is defined as water that - Answer: has little or no taste and odor
True or False : The clearwell tank in most cases is a ground storage tank . - Answer: True
True or False Disinfection equipment shall have a capacity at least twice the highest expected dosage to
be applied at any time . - Answer: False - just 50% more
True or False : Automatic proportioning of the disinfectant dosage to the flow rate of the water being
treated shall be provided at plants where the treatment rate varies automatically and at all plants where
the treatment rate varies more than 10 % above or below the average flow . - Answer: False - 50% above
or below the average flow
, True or False : All disinfecting equipment in surface water treatment plants shall include at least one
functional standby unit of each capacity for ensuring uninterrupted operation . - Answer: True
True or False : Additional disinfection points shall be installed if they are required to adequately control
the quality of the treated water throughout the distribution system . - Answer: True
True or False : Chlorine dioxide , if approved by TCEQ , can be used as an alternative disinfection
process . - Answer: True
True or False : A small bottle of fresh ammonia solution can be poured on the chlorination equipment to
help find a chlorine leak - Answer: False - dont pour it. Ammonia must be in vapor form
True or False Chlorine can be stored with other chemicals . - Answer: False
True or False : Ammonia feed equipment must be housed in a separate enclosure - Answer: True
Where are clearwells located in the system ? - Answer: at the treatment plant
Tanks used for water storage can be used if they have been in service for any other purpose if cleaned
before use : - Answer: under no circumstances
In the clearwell , terminal disinfection should be completed before any customers receive any water . A
common method to prevent short circuiting and to ensure adequate contact time for the disinfectant in
clearwell storage is to : - Answer: install baffles inside the tanks
Contaminants found in any source water could be high with levels of radium , metals ,_______, and
nitrate , and would require some form of treatment or blending from another source low in the
contaminate - Answer: Fluoride
Surface water treatment must provide facilities for pretreatment disinfection , taste and odor control ,
continuous coagulation , sedimentation filtration , covered clearwell storage , and - Answer: terminal
disinfection
and Complete Solutions Graded A+
True or False The following are all components of the distribution system : pumps and motors , valves
and hydrants , water mains and piping , service lines and meters , and various types of storage tanks . -
Answer: True.
True or False ) The distribution system should be designed so that it can provide continuous delivery of a
sufficient volume of potable and palatable water regardless of the amount of pressure present . -
Answer: False
True or False : The TCEQ is the state agency that has primacy responsibilities in regulating public drinking
water systems in Texas . - Answer: True
True or False The TCEQ has established maximum capacity requirements that all public water systems
must meet which include storage pump stations , and water main sizes . - Answer: False
True or False ) Palatable water is safe to drink , and potable water is unsafe to drink . Circle the letter of
the best answer - Answer: False
Water from surface water sources would be creeks ,______, streams , impounded water , and the
oceans . - Answer: Rivers
Water from groundwater sources would be drawn from a________ , an artesian well , or an aquifer . -
Answer: Water table
An example of a public customer is : - Answer: a water/ wastewater treatment plant
An operator's license can be revoked for : - Answer: neglecting duties or falsifying records and cheating
on a state licensing exam
,Under normal conditions , the system and operators should maintain an operating pressure of ______
pounds per square inch - Answer: 35psi
At what location in the system should the correct pressure especially be maintained ? - Answer: at the
meter at the highest elevation.
What qualifications are necessary to become a licensed operator ? - Answer: high school education or
GED meet the experience requirements have taken the required courses and total necessary hours
passed a TCEQ administered exam
The system shall maintain a minimum pressure ( ) of psi during firefighting , line flushing , peak demand ,
and other unusual conditions . - Answer: 20psi
During a natural disaster , if the system is unable to maintain the required minimum pressure , they
have 180 days to submit a revised emergency preparedness plan . When does the 180 - day period begin
? - Answer: when normal power is restored
Potable water is defined as water used for - Answer: human consumption, preparing food drinking
water, all of the above.
Palatable water is defined as water that - Answer: has little or no taste and odor
True or False : The clearwell tank in most cases is a ground storage tank . - Answer: True
True or False Disinfection equipment shall have a capacity at least twice the highest expected dosage to
be applied at any time . - Answer: False - just 50% more
True or False : Automatic proportioning of the disinfectant dosage to the flow rate of the water being
treated shall be provided at plants where the treatment rate varies automatically and at all plants where
the treatment rate varies more than 10 % above or below the average flow . - Answer: False - 50% above
or below the average flow
, True or False : All disinfecting equipment in surface water treatment plants shall include at least one
functional standby unit of each capacity for ensuring uninterrupted operation . - Answer: True
True or False : Additional disinfection points shall be installed if they are required to adequately control
the quality of the treated water throughout the distribution system . - Answer: True
True or False : Chlorine dioxide , if approved by TCEQ , can be used as an alternative disinfection
process . - Answer: True
True or False : A small bottle of fresh ammonia solution can be poured on the chlorination equipment to
help find a chlorine leak - Answer: False - dont pour it. Ammonia must be in vapor form
True or False Chlorine can be stored with other chemicals . - Answer: False
True or False : Ammonia feed equipment must be housed in a separate enclosure - Answer: True
Where are clearwells located in the system ? - Answer: at the treatment plant
Tanks used for water storage can be used if they have been in service for any other purpose if cleaned
before use : - Answer: under no circumstances
In the clearwell , terminal disinfection should be completed before any customers receive any water . A
common method to prevent short circuiting and to ensure adequate contact time for the disinfectant in
clearwell storage is to : - Answer: install baffles inside the tanks
Contaminants found in any source water could be high with levels of radium , metals ,_______, and
nitrate , and would require some form of treatment or blending from another source low in the
contaminate - Answer: Fluoride
Surface water treatment must provide facilities for pretreatment disinfection , taste and odor control ,
continuous coagulation , sedimentation filtration , covered clearwell storage , and - Answer: terminal
disinfection
