"B" WATER OPERATOR - 200
PRACTICE QUESTIONS AND
CORRECT ANSWERS
in certain costal areas, intrusion of sea water in to groundwater basin is most commonl
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y caused by? - ans-over pumping from the ground basin
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Riparian rights are acquired how? - ans-with title to land bordering surface water
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an underground layer of rock or soil that permeates the passage of water is called what
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? - ans-an aquifer
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the first priority, from a public health perspective, is the production of what? - ans-
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water that is drinkable and free from bacteria and toxins
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high color content in water would be indicative of all the following except : - ans-
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a high PH
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what is NOT a common practice in watershed management? - ans-
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allow wastewater discharges into the reservoir?
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controlling taste and odor problems and organic loading within the reservoir may reduc
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e or eliminate: - ans-activated carbon treatment
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chemical control of both plankton and periphyton in domestic water supply reservoirs is
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primarily used to prevent or control: - ans-
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taste and odor problems resulting from algae blooms.
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the three major water quality indicators that affect the efficiency of using copper sulfate
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as an algicide are: - ans-alkalinity, suspended matter, and water temperature.
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during periods of thermal stratification and anaerobic conditions, water quality improve
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ments are obtained by: - ans-the addition of dissolved oxygen
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the most common chemical used to treat algae blooms is? - ans-cuso 4
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the purpose of screening devices is to remove: - ans-large solids
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, in early winter, when the surface of a lake or reservoir cools to the same temperature a
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s the lower layers, the reservoir destratifies, causing: - ans-turnover to occur.
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the following conditions would be most conducive to triggering an algae bloom: - ans-
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available nutrients such as nitrogen and phosphorous and abundant sunlight.
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the MCL for chlorides is? - ans-250 mg/l
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the MCL for iron is? - ans-0.3 mg/l
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the MCL for dissolved solids is? - ans-500 mg/l
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the disinfection residual necessary in the distribution system under the surface water tr
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eatment rule is: - ans-0.2 mg/l 100% of the time
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the correct statement pertaining to potable water is: - ans-
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iron is a secondary regulation with an MCL of 0.3 mg/l
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the primary MCL for tthm is : - ans-.080 mg/l or 80 ppb
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the secondary MCL for fluoride is: - ans-2.0 mg/l
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the correct statement pertaining to potable water is : - ans-
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odor is a secondary regulation with an MCL of 3 TON (threshold odor number)
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the primary MCL for tthm is : - ans-.080 mg/l or 80 ppb
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the following does not fall under the category of secondary drinking water standards: -
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ans-nitrate
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concerning radionuclides, suppliers of water shall monitor at least: - ans-
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once every 36 months ws ws ws
if a routine sample is total coliform positive, the system shall do all the following steps e
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xcept: - ans-collect the repeat samples on different days
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the MORs for public water systems shall be submitted to DER within: - ans-
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15 days after the month of operation
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chapter 17- ws
550 states that the supplier of water shall maintain a minimum free chlorine residual of:
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- ans-0.2 mg/l or its equivalent throughout the distribution system at all times.
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for a system which collects at least 40 samples for month, to be in compliance with the
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MCL for total coliform, no more that ______ of the samples collected can test positive f
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or the month. - ans-5% (or 2 samples)
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PRACTICE QUESTIONS AND
CORRECT ANSWERS
in certain costal areas, intrusion of sea water in to groundwater basin is most commonl
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y caused by? - ans-over pumping from the ground basin
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Riparian rights are acquired how? - ans-with title to land bordering surface water
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an underground layer of rock or soil that permeates the passage of water is called what
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? - ans-an aquifer
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the first priority, from a public health perspective, is the production of what? - ans-
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water that is drinkable and free from bacteria and toxins
ws ws ws ws ws ws ws ws ws
high color content in water would be indicative of all the following except : - ans-
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a high PH
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what is NOT a common practice in watershed management? - ans-
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allow wastewater discharges into the reservoir?
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controlling taste and odor problems and organic loading within the reservoir may reduc
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e or eliminate: - ans-activated carbon treatment
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chemical control of both plankton and periphyton in domestic water supply reservoirs is
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primarily used to prevent or control: - ans-
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taste and odor problems resulting from algae blooms.
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the three major water quality indicators that affect the efficiency of using copper sulfate
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as an algicide are: - ans-alkalinity, suspended matter, and water temperature.
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during periods of thermal stratification and anaerobic conditions, water quality improve
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ments are obtained by: - ans-the addition of dissolved oxygen
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the most common chemical used to treat algae blooms is? - ans-cuso 4
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the purpose of screening devices is to remove: - ans-large solids
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, in early winter, when the surface of a lake or reservoir cools to the same temperature a
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s the lower layers, the reservoir destratifies, causing: - ans-turnover to occur.
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the following conditions would be most conducive to triggering an algae bloom: - ans-
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available nutrients such as nitrogen and phosphorous and abundant sunlight.
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the MCL for chlorides is? - ans-250 mg/l
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the MCL for iron is? - ans-0.3 mg/l
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the MCL for dissolved solids is? - ans-500 mg/l
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the disinfection residual necessary in the distribution system under the surface water tr
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eatment rule is: - ans-0.2 mg/l 100% of the time
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the correct statement pertaining to potable water is: - ans-
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iron is a secondary regulation with an MCL of 0.3 mg/l
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the primary MCL for tthm is : - ans-.080 mg/l or 80 ppb
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the secondary MCL for fluoride is: - ans-2.0 mg/l
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the correct statement pertaining to potable water is : - ans-
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odor is a secondary regulation with an MCL of 3 TON (threshold odor number)
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the primary MCL for tthm is : - ans-.080 mg/l or 80 ppb
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the following does not fall under the category of secondary drinking water standards: -
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ans-nitrate
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concerning radionuclides, suppliers of water shall monitor at least: - ans-
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once every 36 months ws ws ws
if a routine sample is total coliform positive, the system shall do all the following steps e
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xcept: - ans-collect the repeat samples on different days
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the MORs for public water systems shall be submitted to DER within: - ans-
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15 days after the month of operation
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chapter 17- ws
550 states that the supplier of water shall maintain a minimum free chlorine residual of:
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- ans-0.2 mg/l or its equivalent throughout the distribution system at all times.
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for a system which collects at least 40 samples for month, to be in compliance with the
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MCL for total coliform, no more that ______ of the samples collected can test positive f
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or the month. - ans-5% (or 2 samples)
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