Free practice · Water Distribution
Grade 2 Water Distribution Practice Questions
Answer each question, then reveal the correct answer and a full explanation. This is independent study material aligned to commonly tested topics, not official exam questions — exact content varies by state and exam vendor.
What is the main purpose of a cross-connection control (backflow prevention) program?
How many gallons are contained in 500 feet of 8-inch diameter pipe?
What causes water to flow through a distribution system pipe?
A pressure gauge reads 65 psi at a hydrant. What is the equivalent height of water (feet of head)?
What is the commonly required minimum horizontal separation between a new water main and a sanitary sewer main?
A water tower holds water at an elevation of 120 feet above a service connection. What is the approximate static pressure at the connection?
After a water main repair, what is the standard next step before returning the main to service?
What is the main advantage of an elevated storage tank compared to a ground-level reservoir?
Water flows through a 12-inch diameter main (cross-sectional area ≈ 0.785 ft²) at 1,000 gpm. What is the approximate velocity?
In a centrifugal pump, what component imparts velocity to the water before it is converted to pressure?
Want the full topic breakdown for this exam? See the Grade 2 Water Distribution exam guide, or start from the Water Distribution overview.