Water Distribution Class II Exam Prep FREE Sample Exam — Fixed Set

One street reports low pressure while surrounding streets on the same main are normal, and a recent repair occurred on that street. Which cause should field verification check first?

Water moves at 3.5 feet per second through a main section with a cross-sectional area of 1.25 square feet. What is the flow in gpm? Use Flow (gpm) = area (sq ft) x velocity (fps) x 448.8.

Homes below a pressure-reducing valve report pressures well above the valve’s set point at night, but normal pressures during the busy morning. What does the timing of the complaint indicate?

A cross-connection survey finds a chemical mixing tank on a double-check assembly. The contents would be a health hazard if they entered the main. What decision follows from the survey?

A disinfection fill uses 0.06 MG of water in one day at a dose of 25 mg/L, but the chlorine product available is only 65% pure. How many pounds of that product must be fed?

An operator approaches a gate valve with a rising stem and can see the stem standing well up out of the valve. What does the stem’s position tell the operator?

A hydrant inspection finds deep pitting and heavy rust on the barrel right at the ground line, while the upper barrel coating is sound. The hydrant operates normally. What is the best evaluation and next step?

A booster station treats an average flow of 0.85 MGD and applies a chlorine dose of 0.9 mg/L. How many pounds of chlorine does it feed per day?

Water entering a tank carries a good residual, but water leaving the same tank reads much lower. What is the best interpretation?

Discolored-water calls from one neighborhood begin within an hour of a pump trip that briefly reversed flow in the area, then fade over two days. What is the best evaluation of this pattern?

A booster station feeds chlorine into 0.60 MGD of flow at a dose of 1.8 mg/L. How many pounds of chlorine does the station use per day?

By mid-year, a crew leader’s tracking shows repair and overtime spending in the crew’s work areas running well ahead of the budget pace. What should the crew leader do?