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25 Cards in this Set
- Front
- Back
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Intrusion of seawater into ground water basin results from : |
Overpumping fresh water |
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What is the basic objective of the operation of water treatment plants? |
Produce safe, aesthetically pleasing drinking water at a reasonable cost. |
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What is one characteristic of community water system? |
Regularly serves at least full-time residents |
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Which of the following influence size of water treatment plant as well as the number and types of processes it uses? |
Impurities in raw water and cost considerations |
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Which plant operating guidelines are routinely monitored by water treatment plants operators? |
Flows and water quality indicators |
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What is one purpose of clear wells or plant storage reservoirs? |
Provide operational storage to average out high and low flow demands |
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How would you verify the actual raw water flow rate after adjusting the pumping rate to a water treatment plant? I’m not |
Read the raw water flow measuring device |
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How are the initial selection of chemical types and anticipated feed rates for a given application in a water treatment plant usually determined? |
Pilot-plant tests |
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What is the best source of information about dangerous chemicals? |
Safety Data Sheets (SDS) |
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The chlorine cylinder in service has less than 1 day’s chlorine supply remaining. Three 150lb chlorine cylinders are in storage. The plants used an average of 28 pounds of chlorine per day (lb/d). How many days’ supply of chlorine is available? |
16 days |
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Which of these chemicals is one of the most dangerous common alkalies? |
Caustic Soda |
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What should you do if an operator is not breathing due to chlorine gas exposures? |
Perform hands-only or conventional CPR |
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Water samples taken to measure compliance with water quality standards are usually collected at: |
Entrance to the distribution system |
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In a water treatment plant, turbidity is commonly monitored at: |
Source water, flocculation effluent, sedimentation effluent, and filter effluent. |
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The range of turbidity removal effectiveness is important because of the relationship between turbidity the and: |
Pathogenic organisms |
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Federal laws include sludge from a water treatment plant as an _______water that requires proper handling and disposal. |
Industrial |
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What should an operator do promptly when a treatment process upset results in the failure to meet a specific drinking water quality standard? |
Notify appropriate local health authorities |
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If water a treatment plant must be dewatered for emergency repairs, how would you prepare for this event? |
Fill all storage reservoirs by early evening |
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What kinds of records are operators required to keep on file for specified time periods for regulatory compliance? |
Water quality analysis and customer complaints |
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What is one way of keeping track of how much time and money is spent doing various types of work? |
Work order system |
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How can energy requirements for lighting be reduced in water treatment plant? |
Turn off lights in unoccupied spaces |
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What regulations require the accurate records of water treatment plant operations be maintained? |
Safe Drinking Water Act |
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What contributes to most treatment plant accidents? |
Carelessness and negligence |
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What is the responsibility of water treatment plant operators |
Produce safe and pleasant drinking water |
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What do most states require for someone to work as a water treatment plant operator? |
Operator certificate |
