TEXAS CLASS D WATER LICESNE EXAM |
NEWEST ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
GRADED A+ | 100% PASS | 2025 UPDATE!
If backwashing is done improperly what forms in the media causing it to
crack and clog? - ✔✔✔ Correct Answer > mudballs
All water in storage or transported through the distribution system
must have a disinfectant? - ✔✔✔ Correct Answer > residual
Chemicals used to disinfect include chloramine, chlorine, chlorine
dioxide, and? - ✔✔✔ Correct Answer > ozone
Chlorination of surface water may lead to the formation of
trihalomethanes and? - ✔✔✔ Correct Answer > haloacetic acids
A disinfectant residual is the amount of ? left over after the demand
has been satisfied. - ✔✔✔ Correct Answer > chlorine
Chlorine is used for taste and odor control, oxidation of iron and
manganese, oxidation of hydrogen sulfide and disinfection of? - ✔✔✔
Correct Answer > repairs
,A system's filtered water must be less than or equal to ? Nephlometric
Turbidity Units in at least 95% of the measurements taken each month.
No sample can exceed? - ✔✔✔ Correct Answer > 0.3 NTU, 1 NTU
Systems serving less than 500 persons may reduce turbidity sampling to
once per? - ✔✔✔ Correct Answer > day
Inadequate disinfection must be reported to the state the ? business
day. - ✔✔✔ Correct Answer > next
No more than 5% of the distribution samples can have inadequate
residuals for how many consecutive months? - ✔✔✔ Correct Answer
>2
To assess the adequacy of disinfection contact time, tracer study data
must be submitted to the? - ✔✔✔ Correct Answer > state
Fluoride in drinking water is beneficial or detrimental depending on the
amount present. Studies indicate moderate levels of fluoride (0.7 to 1.0
mg/L) reduce? - ✔✔✔ Correct Answer > cavaties
Waters high in natural fluoride (above 2.0 mg/L) cause - ✔✔✔ Correct
Answer > mottling
, Water from rivers, lakes, and reservoirs is called - ✔✔✔ Correct
Answer > surface water
40 % of of public water systems use? - ✔✔✔ Correct Answer >
surface water
Sodium aluminate, aluminum sulfate, ferrous sulfate, and ferric
chloride are all? - ✔✔✔ Correct Answer > coagulants
What causes small particles in water to clot together forming floc, and
this process, flocculation, forms larger particles that settle more
readily? - ✔✔✔ Correct Answer > coagulants
Turbidity, pH, temperature, alkalinity, and chemical dosage affect? -
✔✔✔ Correct Answer > coagulation
To remove suspended solids and chlorine-resistant microorganisms,
surface water must be? - ✔✔✔ Correct Answer > disinfected
What is the final step in removing suspended matter and chlorine-
resistant microorganisms? - ✔✔✔ Correct Answer > filtering
NEWEST ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
GRADED A+ | 100% PASS | 2025 UPDATE!
If backwashing is done improperly what forms in the media causing it to
crack and clog? - ✔✔✔ Correct Answer > mudballs
All water in storage or transported through the distribution system
must have a disinfectant? - ✔✔✔ Correct Answer > residual
Chemicals used to disinfect include chloramine, chlorine, chlorine
dioxide, and? - ✔✔✔ Correct Answer > ozone
Chlorination of surface water may lead to the formation of
trihalomethanes and? - ✔✔✔ Correct Answer > haloacetic acids
A disinfectant residual is the amount of ? left over after the demand
has been satisfied. - ✔✔✔ Correct Answer > chlorine
Chlorine is used for taste and odor control, oxidation of iron and
manganese, oxidation of hydrogen sulfide and disinfection of? - ✔✔✔
Correct Answer > repairs
,A system's filtered water must be less than or equal to ? Nephlometric
Turbidity Units in at least 95% of the measurements taken each month.
No sample can exceed? - ✔✔✔ Correct Answer > 0.3 NTU, 1 NTU
Systems serving less than 500 persons may reduce turbidity sampling to
once per? - ✔✔✔ Correct Answer > day
Inadequate disinfection must be reported to the state the ? business
day. - ✔✔✔ Correct Answer > next
No more than 5% of the distribution samples can have inadequate
residuals for how many consecutive months? - ✔✔✔ Correct Answer
>2
To assess the adequacy of disinfection contact time, tracer study data
must be submitted to the? - ✔✔✔ Correct Answer > state
Fluoride in drinking water is beneficial or detrimental depending on the
amount present. Studies indicate moderate levels of fluoride (0.7 to 1.0
mg/L) reduce? - ✔✔✔ Correct Answer > cavaties
Waters high in natural fluoride (above 2.0 mg/L) cause - ✔✔✔ Correct
Answer > mottling
, Water from rivers, lakes, and reservoirs is called - ✔✔✔ Correct
Answer > surface water
40 % of of public water systems use? - ✔✔✔ Correct Answer >
surface water
Sodium aluminate, aluminum sulfate, ferrous sulfate, and ferric
chloride are all? - ✔✔✔ Correct Answer > coagulants
What causes small particles in water to clot together forming floc, and
this process, flocculation, forms larger particles that settle more
readily? - ✔✔✔ Correct Answer > coagulants
Turbidity, pH, temperature, alkalinity, and chemical dosage affect? -
✔✔✔ Correct Answer > coagulation
To remove suspended solids and chlorine-resistant microorganisms,
surface water must be? - ✔✔✔ Correct Answer > disinfected
What is the final step in removing suspended matter and chlorine-
resistant microorganisms? - ✔✔✔ Correct Answer > filtering
