TCEQ - CLASS D WATER REVIEW
EXAM QUESTIONS & SOLUTIONS
RATED 100% CORRECT
Who is authorized to remove a lock and tag placed on a piece of equipment to isolate it for
maintenance? - correct answer ✔✔Only the person who placed the lock and tag
Although each step of the water treatment process is important, which process is often referred
to as the most important? - correct answer ✔✔Disinfection
What is/are the required locations for vent(s) in a chlorine gas cylinder storage room? - correct
answer ✔✔At least one high-level and one floor level vent
A surface water treatment plant is flowing at 3.1 MGD. How many gallons per minute (gpm) is
this? - correct answer ✔✔2,153
Which chemical below is a solid form of chlorine that is often used by small water systems as
their primary disinfectant? - correct answer ✔✔Calcium Hypochlorite
If an operator knows the pumping water level and the static water level in a well, he/she will be
able to calculate the: - correct answer ✔✔Drawdown
Coagulation by the addition of positively charged ions can also be described as: - correct answer
✔✔Charge neutralization
Convert a flow rate of 1,667 gallons per minute (gpm) to units of million gallons per day (MGD).
- correct answer ✔✔2.4
, What is the minimum acceptable disinfection residual at all points of the distribution system?
(choose all that apply) - correct answer ✔✔0.2 mg/L free chlorine residual & 0.5 mg/L
Chloramine Residual
Pipe and fittings used in public water systems may not contain more than ____% lead or solder
and flux may not contain more than ____% lead. - correct answer ✔✔0.25, 0.2
In addition to the normal minimum operating pressure of 35 psi, what is the minimum
emergency operating pressure a public water supply system should maintain? - correct answer
✔✔20 psi
Which of the below options are common types of pumps for use in deep water wells? (choose
all that apply) - correct answer ✔✔Submersible pump & Vertical Turbine Pump
How much time does the system operator have to contact the TCEQ by phone when a
contamination event occurs in a public water system? - correct answer ✔✔24 Hours
What is it called when chlorine is added to a water supply and it is all used up by reacting with
iron, organics, or bacteria? - correct answer ✔✔Demand
What State Agency is responsible for enforcing the Safe Drinking Water Act in Texas? - correct
answer ✔✔Texas Commission on Environmental Quality (TCEQ)
What are public water systems expected to provide to their customers at all times? - correct
answer ✔✔Proper disinfection of delivered water
Sufficient water pressure
Sufficient quantity of water
(ALL OF THE ABOVE)
EXAM QUESTIONS & SOLUTIONS
RATED 100% CORRECT
Who is authorized to remove a lock and tag placed on a piece of equipment to isolate it for
maintenance? - correct answer ✔✔Only the person who placed the lock and tag
Although each step of the water treatment process is important, which process is often referred
to as the most important? - correct answer ✔✔Disinfection
What is/are the required locations for vent(s) in a chlorine gas cylinder storage room? - correct
answer ✔✔At least one high-level and one floor level vent
A surface water treatment plant is flowing at 3.1 MGD. How many gallons per minute (gpm) is
this? - correct answer ✔✔2,153
Which chemical below is a solid form of chlorine that is often used by small water systems as
their primary disinfectant? - correct answer ✔✔Calcium Hypochlorite
If an operator knows the pumping water level and the static water level in a well, he/she will be
able to calculate the: - correct answer ✔✔Drawdown
Coagulation by the addition of positively charged ions can also be described as: - correct answer
✔✔Charge neutralization
Convert a flow rate of 1,667 gallons per minute (gpm) to units of million gallons per day (MGD).
- correct answer ✔✔2.4
, What is the minimum acceptable disinfection residual at all points of the distribution system?
(choose all that apply) - correct answer ✔✔0.2 mg/L free chlorine residual & 0.5 mg/L
Chloramine Residual
Pipe and fittings used in public water systems may not contain more than ____% lead or solder
and flux may not contain more than ____% lead. - correct answer ✔✔0.25, 0.2
In addition to the normal minimum operating pressure of 35 psi, what is the minimum
emergency operating pressure a public water supply system should maintain? - correct answer
✔✔20 psi
Which of the below options are common types of pumps for use in deep water wells? (choose
all that apply) - correct answer ✔✔Submersible pump & Vertical Turbine Pump
How much time does the system operator have to contact the TCEQ by phone when a
contamination event occurs in a public water system? - correct answer ✔✔24 Hours
What is it called when chlorine is added to a water supply and it is all used up by reacting with
iron, organics, or bacteria? - correct answer ✔✔Demand
What State Agency is responsible for enforcing the Safe Drinking Water Act in Texas? - correct
answer ✔✔Texas Commission on Environmental Quality (TCEQ)
What are public water systems expected to provide to their customers at all times? - correct
answer ✔✔Proper disinfection of delivered water
Sufficient water pressure
Sufficient quantity of water
(ALL OF THE ABOVE)
