A Prep TCEQ Exam with Questions and
100% Correct Answers Verified by Expert
2025 Latest Update
Q: What are new surface water reservoirs in Texas?
A: Declines in certain areas.
Q: What happens when manganese is sequestered?
A: It does not allow manganese to combine with oxygen.
Q: What is the maximum lead percentage in pipes, solder, and flux?
A: The maximum lead is 0.25% for pipes, and 0.2% for lead and solder flux.
Q: What is the action level for lead?
A: The lead action level is 0.015%.
Q: How do you know you have a TTHM MCL violation?
A: If the locational running average of all samples exceeds the TTHM maximum contaminant
level of 0.080.
Q: What happens if TTHM averages are 0.060, 0.080, 0.080, and 0.090?
A: The average does not exceed 0.080, so it is not an MCL violation. This is an operational level
violation, and an operational assessment will need to be performed.
Q: How many pumps and GPM are required for a groundwater system with two pressure
planes and 100 connections each?
A: Two or more pumps per pressure plane or pump station, with a total capacity of 0.2 GPM. So,
four pumps at 200 GPM.
, Q: What is a bolson aquifer?
A: Deep-filled valley deposits.
Q: In a chloraminated system with 1 mg/L total chlorine and 0.1 mg/L free ammonia, what
booster dosage is needed to reach a 2.5 mg/L total residual?
A: The ratio is 5 parts chlorine to 1 part ammonia. To reach 2.5 mg/L total residual: 0.2 mg/L
ammonia first, then 1.5 mg/L chlorine.
Q: What happens when excess chlorine is added?
A: The total residual becomes unstable.
Q: What happens when free chlorine is blended with monochloramine and free ammonia?
A: Free ammonia will mix with free chlorine to create dichloramine, causing taste and odor
issues.
Q: When should a pressure filter be backwashed?
A: When it reaches 10 psi of head loss.
Q: Who controls groundwater in the state of Texas?
A: Groundwater is considered private property.
Q: What does hypolimnion aeration do?
A: It adds oxygen to the bottom layer of water.
Q: When does total hardness equal total alkalinity?
A: When the hardness is entirely carbonate.
100% Correct Answers Verified by Expert
2025 Latest Update
Q: What are new surface water reservoirs in Texas?
A: Declines in certain areas.
Q: What happens when manganese is sequestered?
A: It does not allow manganese to combine with oxygen.
Q: What is the maximum lead percentage in pipes, solder, and flux?
A: The maximum lead is 0.25% for pipes, and 0.2% for lead and solder flux.
Q: What is the action level for lead?
A: The lead action level is 0.015%.
Q: How do you know you have a TTHM MCL violation?
A: If the locational running average of all samples exceeds the TTHM maximum contaminant
level of 0.080.
Q: What happens if TTHM averages are 0.060, 0.080, 0.080, and 0.090?
A: The average does not exceed 0.080, so it is not an MCL violation. This is an operational level
violation, and an operational assessment will need to be performed.
Q: How many pumps and GPM are required for a groundwater system with two pressure
planes and 100 connections each?
A: Two or more pumps per pressure plane or pump station, with a total capacity of 0.2 GPM. So,
four pumps at 200 GPM.
, Q: What is a bolson aquifer?
A: Deep-filled valley deposits.
Q: In a chloraminated system with 1 mg/L total chlorine and 0.1 mg/L free ammonia, what
booster dosage is needed to reach a 2.5 mg/L total residual?
A: The ratio is 5 parts chlorine to 1 part ammonia. To reach 2.5 mg/L total residual: 0.2 mg/L
ammonia first, then 1.5 mg/L chlorine.
Q: What happens when excess chlorine is added?
A: The total residual becomes unstable.
Q: What happens when free chlorine is blended with monochloramine and free ammonia?
A: Free ammonia will mix with free chlorine to create dichloramine, causing taste and odor
issues.
Q: When should a pressure filter be backwashed?
A: When it reaches 10 psi of head loss.
Q: Who controls groundwater in the state of Texas?
A: Groundwater is considered private property.
Q: What does hypolimnion aeration do?
A: It adds oxygen to the bottom layer of water.
Q: When does total hardness equal total alkalinity?
A: When the hardness is entirely carbonate.
