California Water Treatment T2 Exam Prep FREE Sample Exam

When hypolimnion water and bottom sediments become anoxic, the sediments commonly release

iron, manganese, hydrogen sulfide, and phosphorus into the overlying water

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chlorine residual, fluoride, and hardness into the overlying water

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dissolved oxygen and nitrate into the overlying water in large amounts

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only clear, low-mineral water that improves the quality of deep intakes, including the weeks immediately following spring turnover

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A system’s drought plan sets Stage 2 actions when reservoir storage falls below 55 percent of capacity on June 1. Storage measures 51 percent on that date with a dry forecast. The operator should

implement the Stage 2 measures in the plan, such as tightened outdoor-use restrictions and more frequent source monitoring

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wait for storage to reach the Stage 4 trigger before taking any action at all

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increase pumping from the reservoir to lower it further and make room for hoped-for storms

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suspend all source monitoring until the reservoir refills above 55 percent

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A fuel spill is reported on a tributary above the reservoir, and a sheen is expected to reach the intake area within hours. What source-side posture fits the abnormal-conditions framework?

Take no action until the sheen is visible at the screens, because advance reports are not a basis for operating decisions

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Classify the spill as a normal hydrological change and simply plan for slightly harder treatment next week

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Rely on pre-sedimentation alone, since settling is the procedure that removes petroleum from reservoir water

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Investigate and monitor closely, and be ready to adjust or protect the intake and notify as the situation requires

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Which set of signs points to an upset or displaced gravel supporting bed in a gravity filter?

A level media surface, even washing, and steady head loss

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Clear wash water, slow head loss growth, and long filter runs

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Falling chlorine demand and a steady filtered-water turbidity

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Mounding or cratering of the media surface and uneven washing

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A precursor removal step lowers the total organic carbon of a water from 4.8 mg/L to 1.9 mg/L. What is the percent removal?

39.6 percent removal

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29.0 percent removal

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60.4 percent removal

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71.0 percent removal

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Besides the initial precoat, why is additional diatomaceous earth fed continuously during a precoat filter run?

To dissolve into the water and provide a disinfectant residual

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To keep building fresh filtering surface so the cake stays permeable

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To raise the pH of the water as it passes through the filter cake

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To glue the precoat to the septum so it cannot slough off later

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What must be true of a newly installed pump’s suction before the first start?

The casing must be full of water, with a flooded suction or the pump primed, before it is started.

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The pump should be started dry and allowed to pull water up on its own for several minutes first.

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Only the discharge line needs to be full of water; the casing itself may be left empty at start-up.

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Priming is needed only after a pump has been repaired, never at a first installation start-up.

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A pump delivers 620 gpm against a total head of 110 ft and runs at 82% efficiency. What brake horsepower must the motor supply?

17.22 hp

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21.00 hp

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25.61 hp

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14.12 hp

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A method reports chlorine results to one decimal place. A worksheet calculation gives 12.347 mg/L. How should the result be reported?

12.347 mg/L, keeping every digit the calculation produced

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12 mg/L, rounded down to a whole number for simplicity

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12.3 mg/L, rounded to the method's reporting precision

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12.30 mg/L, adding a zero to show extra measured precision

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The membrane filtration technique in bacteriological testing is recognized by which purpose?

It titrates a sample to an endpoint to measure its alkalinity

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It develops a pink color whose intensity shows chlorine residual

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It traps bacteria from a measured volume on a filter so colonies can grow and be counted

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It incubates sealed sample bottles to show only presence or absence

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A treatment plant had an annual chemical budget of $56,000, and records show $41,200 has been spent so far. What percent of the chemical budget has been expended?

62.50%

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85.00%

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73.57%

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26.43%

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Where is the decontamination corridor set up at a hazardous-substance incident?

Inside the hot zone, as close as possible to the source of the release so contaminated equipment travels the shortest distance, because responders prefer to begin decontamination before putting on protective equipment

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At the plant entrance gate, so the public can observe that decontamination is being performed correctly

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In the cold zone, well away from any contamination, so that no protective equipment is needed by the decontamination crew

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In the warm zone, between the hot zone and the cold zone, so responders and equipment are decontaminated before entering the clean area

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California Water Treatment T2 Exam Prep FREE Sample Exam — Fixed Set

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