Texas Water Supply Managemen
DRIVER OPERATOR CHAPTER 13 - WATER
SHUTTLE OPERATIONS - EXAM PREP
ACTUAL QUESTIONS AND 100% SOLVED
ANSWERS |NEWEST UPDATE |ALREADY
GRADED A+
1. What is one primary benefit of constructing new surface water supply reservoirs in
Texas?
Increased groundwater depletion
Enhanced water storage capacity
Reduction in water quality
Decreased recreational opportunities
2. How long must a water system save their bacteriological test results?
5 years
6 months
1 year
3 years
3. Explain why calcium chloride is not suitable for raising the pH of water compared to
other chemicals like sodium bicarbonate or potassium hydroxide.
It does not dissolve in water
It lowers the pH
It has no effect on pH
It is a strong acid
4. What is one of the main goals of enhanced coagulation in water treatment?
, Increase pH levels
Reduce the concentration of disinfection byproducts precursors
Improve taste and odor
Decrease turbidity
5. What is the threshold percentage of distribution disinfectant residual readings that, if
exceeded for two consecutive months, will result in a treatment technique violation
according to TCEQ regulations?
, 1%
3%
5%
10%
6. A bolson aquifer is characterized by...
deep filled valley deposits
shallow deposits between mountains
deposits along East Texas river bottoms
deposits along West Texas intermittent streams
none of the above
7. What is the typical range for the theoretical detention time of the disinfection zone in
water treatment processes?
5 to 10 minutes
10 to 30 minutes
30 to 60 minutes
60 to 120 minutes
8. Explain how coagulation, flocculation, and settling contribute to the reduction of
bacterial contamination in water treatment processes.
They increase the water temperature to kill bacteria.
They remove suspended particles that bacteria cling to, thus reducing their
numbers.
They add chemicals that directly kill bacteria.
They aerate the water, which eliminates bacteria.
9. If a region has predominantly small and disconnected soil pores, what impact would
this have on groundwater availability for agricultural use?
Groundwater would be readily available for irrigation due to high retention.
, Groundwater would be limited, making it difficult to access sufficient water
for crops.
Groundwater would flow rapidly to the surface, causing flooding.
Groundwater would be abundant but contaminated due to slow movement.
10. If a surface water treatment plant detects the presence of pathogens that form
resistant cysts, what operational changes might be necessary to ensure water safety?
Increase the chlorine dosage during disinfection
Reduce the filtration rate to allow for better pathogen removal
Implement additional treatment processes such as UV disinfection
All of the above
11. What is a safe minimum chlorine residual in a distribution system?
0.2 mg/L
0.3 mg/L
0.5 mg/L
0.05 mg/L
12. If a water treatment facility experiences a significant increase in organic matter due
to seasonal runoff, what adjustments should be made to the chlorine dosage to
maintain effective disinfection?
Decrease the chlorine dosage to prevent over-chlorination.
Maintain the current chlorine dosage as it is unaffected by organic matter.
Increase the chlorine dosage to account for the higher chlorine demand.
Switch to an alternative disinfectant that is less affected by organic matter.
13. Why do operators monitor a filter's operation time, head loss and effluent turbidity
level?
To watch for Breakpoint Chlorination
Identify when it is time to do a filter backwash
To measure pump curve
DRIVER OPERATOR CHAPTER 13 - WATER
SHUTTLE OPERATIONS - EXAM PREP
ACTUAL QUESTIONS AND 100% SOLVED
ANSWERS |NEWEST UPDATE |ALREADY
GRADED A+
1. What is one primary benefit of constructing new surface water supply reservoirs in
Texas?
Increased groundwater depletion
Enhanced water storage capacity
Reduction in water quality
Decreased recreational opportunities
2. How long must a water system save their bacteriological test results?
5 years
6 months
1 year
3 years
3. Explain why calcium chloride is not suitable for raising the pH of water compared to
other chemicals like sodium bicarbonate or potassium hydroxide.
It does not dissolve in water
It lowers the pH
It has no effect on pH
It is a strong acid
4. What is one of the main goals of enhanced coagulation in water treatment?
, Increase pH levels
Reduce the concentration of disinfection byproducts precursors
Improve taste and odor
Decrease turbidity
5. What is the threshold percentage of distribution disinfectant residual readings that, if
exceeded for two consecutive months, will result in a treatment technique violation
according to TCEQ regulations?
, 1%
3%
5%
10%
6. A bolson aquifer is characterized by...
deep filled valley deposits
shallow deposits between mountains
deposits along East Texas river bottoms
deposits along West Texas intermittent streams
none of the above
7. What is the typical range for the theoretical detention time of the disinfection zone in
water treatment processes?
5 to 10 minutes
10 to 30 minutes
30 to 60 minutes
60 to 120 minutes
8. Explain how coagulation, flocculation, and settling contribute to the reduction of
bacterial contamination in water treatment processes.
They increase the water temperature to kill bacteria.
They remove suspended particles that bacteria cling to, thus reducing their
numbers.
They add chemicals that directly kill bacteria.
They aerate the water, which eliminates bacteria.
9. If a region has predominantly small and disconnected soil pores, what impact would
this have on groundwater availability for agricultural use?
Groundwater would be readily available for irrigation due to high retention.
, Groundwater would be limited, making it difficult to access sufficient water
for crops.
Groundwater would flow rapidly to the surface, causing flooding.
Groundwater would be abundant but contaminated due to slow movement.
10. If a surface water treatment plant detects the presence of pathogens that form
resistant cysts, what operational changes might be necessary to ensure water safety?
Increase the chlorine dosage during disinfection
Reduce the filtration rate to allow for better pathogen removal
Implement additional treatment processes such as UV disinfection
All of the above
11. What is a safe minimum chlorine residual in a distribution system?
0.2 mg/L
0.3 mg/L
0.5 mg/L
0.05 mg/L
12. If a water treatment facility experiences a significant increase in organic matter due
to seasonal runoff, what adjustments should be made to the chlorine dosage to
maintain effective disinfection?
Decrease the chlorine dosage to prevent over-chlorination.
Maintain the current chlorine dosage as it is unaffected by organic matter.
Increase the chlorine dosage to account for the higher chlorine demand.
Switch to an alternative disinfectant that is less affected by organic matter.
13. Why do operators monitor a filter's operation time, head loss and effluent turbidity
level?
To watch for Breakpoint Chlorination
Identify when it is time to do a filter backwash
To measure pump curve
