1|Page
TEXAS CLASS C WASTE WATER TREATMENT
LICENSE TEST 2026/2027 EXAM QUESTIONS
ACCURATE ACTUAL EXAM ||VERIFIED EXAM!!!
FREQUENTLY TESTED QUESTIONS WITH DETAILED
ANSWERS | GUARANTEED PASS | GRADED A+!!!
Amperometric titration is used to measure
A. Dissolved solids
B. Chlorine residual
C. Colloids
D. Emulsions - Answers-B. Chlorine residual
What growth phase is an aerobic digester operated in.
A. Log
B. Lag
C. Endogenous respiration
D. Declining phase - Answers-C. Endogenous respiration
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If excessive pressure builds up in a chlorine tank due to
excessive heat. What will prevent explosions?
A. Valve seat adjustments
B. Heat reducing valve
C. Fusible plug
D. Check valve - Answers-C. Fusible plug
You notice that your bearings are excessively hot on a
pump, why?
A. Ambient temperature too high
B. Over lubrication
C. Oil seal blown
D. Discharge rate too low - Answers-B. Over lubrication
Where can you gain access for collection system
maintenance?
A. Lift station
B. Force main
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C. Man hole
D. Gravity main - Answers-C. Man hole
Low DO and nutrient deficiency will promote the growth of
what?
A. Rotifers
B. Filamentous bacteria
C. Spirillium
D. Amoebas - Answers-B. Filamentous bacteria
When charging a lead-acid type battery for a composite
sampler, what dangerous gas could be produced?
A. Hydrogen
B. Oxygen
C. Hydrogen sulfide
D. Cyanide - Answers-A. Hydrogen
What is the best method in dealing with a chemical spill?
, 4|Page
A. Contain and clean up
B. Saw dust and kitty litter
C. Foam congaing super trimethyl bromine
D. Flood with water - Answers-A. Contain and clean up
There is septic wastewater entering your primary clarifier.
What is the problem?
A. Aerobic conditions in the collections system
B. Lift station pumps operating on short cycles
C. Anaerobic conditions in the collections systems
D. High flows due to a low MCRT - Answers-C. Anaerobic
condition in the collections system
Which of the following substances is highly viscous and
very slippery?
A. Calcium hypochlorite
B. Calcium oxide
C. Potassium permanganate
D. Polymer - Answers-D. Polymer
TEXAS CLASS C WASTE WATER TREATMENT
LICENSE TEST 2026/2027 EXAM QUESTIONS
ACCURATE ACTUAL EXAM ||VERIFIED EXAM!!!
FREQUENTLY TESTED QUESTIONS WITH DETAILED
ANSWERS | GUARANTEED PASS | GRADED A+!!!
Amperometric titration is used to measure
A. Dissolved solids
B. Chlorine residual
C. Colloids
D. Emulsions - Answers-B. Chlorine residual
What growth phase is an aerobic digester operated in.
A. Log
B. Lag
C. Endogenous respiration
D. Declining phase - Answers-C. Endogenous respiration
,2|Page
If excessive pressure builds up in a chlorine tank due to
excessive heat. What will prevent explosions?
A. Valve seat adjustments
B. Heat reducing valve
C. Fusible plug
D. Check valve - Answers-C. Fusible plug
You notice that your bearings are excessively hot on a
pump, why?
A. Ambient temperature too high
B. Over lubrication
C. Oil seal blown
D. Discharge rate too low - Answers-B. Over lubrication
Where can you gain access for collection system
maintenance?
A. Lift station
B. Force main
,3|Page
C. Man hole
D. Gravity main - Answers-C. Man hole
Low DO and nutrient deficiency will promote the growth of
what?
A. Rotifers
B. Filamentous bacteria
C. Spirillium
D. Amoebas - Answers-B. Filamentous bacteria
When charging a lead-acid type battery for a composite
sampler, what dangerous gas could be produced?
A. Hydrogen
B. Oxygen
C. Hydrogen sulfide
D. Cyanide - Answers-A. Hydrogen
What is the best method in dealing with a chemical spill?
, 4|Page
A. Contain and clean up
B. Saw dust and kitty litter
C. Foam congaing super trimethyl bromine
D. Flood with water - Answers-A. Contain and clean up
There is septic wastewater entering your primary clarifier.
What is the problem?
A. Aerobic conditions in the collections system
B. Lift station pumps operating on short cycles
C. Anaerobic conditions in the collections systems
D. High flows due to a low MCRT - Answers-C. Anaerobic
condition in the collections system
Which of the following substances is highly viscous and
very slippery?
A. Calcium hypochlorite
B. Calcium oxide
C. Potassium permanganate
D. Polymer - Answers-D. Polymer
