TCEQ Class B Surface Water B test material –Exam
2025/2026 with Questions and Correct Answers| Latest
Update | Graded A+
Question:1
Two Towers are both 125 feet high, when full, contain 122 feet of water. Tower 1
holds 150,000 gallons. Tower 2 holds 500,000 gallons. Each has a pressure gauge
at the base. Which will register the most pressure in psi? - Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the
base - 51.1 psi
Question:2
What is the definition of potable water - Water that does not contain objectable
pollution, contamination, or infective agents and is considered safe for drinking
Question:3
What is the first item used when installing a service line to a customer? -
Corporation stop
Question:4
If a meter to a residence is located in the basement what should be located
between the water main and the house - curb stop
1|Page
, Question:5
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter
__________ in recording actual water used - Decreases
Question:6
To isolate part of a distribution system what type of valve is commonly used? -
Gate valve
Question:7
Trihalomethanes (THMs) are caused by? - Reaction of chlorinated water with
numeric materials found in surface water sources
Question:8
The longer the contact time water and chlorine residuals enjoy the ________ the
THM level will probably be - Higher
Question:9
THM's should be eliminated from finished water because they cause ? - Cancer
Question:10
The maximum contaminant level for THM's is? - .080 mg/l
Question:11
When collecting THM samples one sample must be taken at a site where the
water has been in the distribution system the longest time - True
2|Page
2025/2026 with Questions and Correct Answers| Latest
Update | Graded A+
Question:1
Two Towers are both 125 feet high, when full, contain 122 feet of water. Tower 1
holds 150,000 gallons. Tower 2 holds 500,000 gallons. Each has a pressure gauge
at the base. Which will register the most pressure in psi? - Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the
base - 51.1 psi
Question:2
What is the definition of potable water - Water that does not contain objectable
pollution, contamination, or infective agents and is considered safe for drinking
Question:3
What is the first item used when installing a service line to a customer? -
Corporation stop
Question:4
If a meter to a residence is located in the basement what should be located
between the water main and the house - curb stop
1|Page
, Question:5
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter
__________ in recording actual water used - Decreases
Question:6
To isolate part of a distribution system what type of valve is commonly used? -
Gate valve
Question:7
Trihalomethanes (THMs) are caused by? - Reaction of chlorinated water with
numeric materials found in surface water sources
Question:8
The longer the contact time water and chlorine residuals enjoy the ________ the
THM level will probably be - Higher
Question:9
THM's should be eliminated from finished water because they cause ? - Cancer
Question:10
The maximum contaminant level for THM's is? - .080 mg/l
Question:11
When collecting THM samples one sample must be taken at a site where the
water has been in the distribution system the longest time - True
2|Page
