California Water Treatment T1 Exam Prep FREE Sample Exam — Fixed Set

A raw-water sample has a reddish-brown color, and customers served by a nearby system report rusty staining on laundry and fixtures. Which contaminant most likely explains these signs?

A rectangular raw-water storage basin is 40 ft long, 20 ft wide, and filled to a depth of 10 ft. How many gallons of water does it hold?

An operator needs the water level in a well both before the pump starts and while it runs. Which tool is lowered into the well to find the level directly?

Finished water leaving a treatment plant tests very low for lead, yet some homes served by the plant show lead at the tap. Where does that lead usually come from?

A plant treats 0.80 MGD and needs a chlorine dose of 2.0 mg/L using a product that is 70 percent available chlorine. How many pounds of product per day must be fed?

An operator needs to lower the pH of treated water that is too alkaline. Which choice would do that?

An operator compares a day tank’s level at the start and end of a shift. What does a falling level over the shift confirm?

A plant flowing 0.5 million gallons per day needs a dose of 2.0 mg/L. The chemical solution is 50 percent pure and weighs 10.0 pounds per gallon. What solution feed rate, in gallons per day, is required?

A laboratory standard is prepared using C1V1 = C2V2. If 25 mL of a 4000 mg/L standard is diluted to a final volume of 200 mL, what is the final concentration?

A rotten-egg odor in water is the characteristic sign of:

A filter receives water at 250 NTU and produces filtered water at 10 NTU. What is the percent removal across the filter?

An operator certified in another state takes a job at a California treatment plant. What must happen before that operator can work as a certified operator in California?