"B" Water Operator - 200 Practice questions
in certain costal areas, intrusion of sea water in to groundwater basin is most commonly caused by? -
(correct Answer) - over pumping from the ground basin
Riparian rights are acquired how? - (correct Answer) - with title to land bordering surface water
an underground layer of rock or soil that permeates the passage of water is called what? - (correct
Answer) - an aquifer
the first priority, from a public health perspective, is the production of what? - (correct Answer) - water
that is drinkable and free from bacteria and toxins
high color content in water would be indicative of all the following except : - (correct Answer) - a high PH
what is NOT a common practice in watershed management? - (correct Answer) - allow wastewater
discharges into the reservoir?
controlling taste and odor problems and organic loading within the reservoir may reduce or eliminate: -
(correct Answer) - activated carbon treatment
chemical control of both plankton and periphyton in domestic water supply reservoirs is primarily used
to prevent or control: - (correct Answer) - taste and odor problems resulting from algae blooms.
the three major water quality indicators that affect the efficiency of using copper sulfate as an algicide
are: - (correct Answer) - alkalinity, suspended matter, and water temperature.
during periods of thermal stratification and anaerobic conditions, water quality improvements are
obtained by: - (correct Answer) - the addition of dissolved oxygen
the most common chemical used to treat algae blooms is? - (correct Answer) - cuso 4
the purpose of screening devices is to remove: - (correct Answer) - large solids
in early winter, when the surface of a lake or reservoir cools to the same temperature as the lower
layers, the reservoir destratifies, causing: - (correct Answer) - turnover to occur.
the following conditions would be most conducive to triggering an algae bloom: - (correct Answer) -
available nutrients such as nitrogen and phosphorous and abundant sunlight.
the MCL for chlorides is? - (correct Answer) - 250 mg/l
the MCL for iron is? - (correct Answer) - 0.3 mg/l
the MCL for dissolved solids is? - (correct Answer) - 500 mg/l
, the disinfection residual necessary in the distribution system under the surface water treatment rule is: -
(correct Answer) - 0.2 mg/l 100% of the time
the correct statement pertaining to potable water is: - (correct Answer) - iron is a secondary regulation
with an MCL of 0.3 mg/l
the primary MCL for tthm is : - (correct Answer) - .080 mg/l or 80 ppb
the secondary MCL for fluoride is: - (correct Answer) - 2.0 mg/l
the correct statement pertaining to potable water is : - (correct Answer) - odor is a secondary regulation
with an MCL of 3 TON (threshold odor number)
the primary MCL for tthm is : - (correct Answer) - .080 mg/l or 80 ppb
the following does not fall under the category of secondary drinking water standards: - (correct Answer)
- nitrate
concerning radionuclides, suppliers of water shall monitor at least: - (correct Answer) - once every 36
months
if a routine sample is total coliform positive, the system shall do all the following steps except: - (correct
Answer) - collect the repeat samples on different days
the MORs for public water systems shall be submitted to DER within: - (correct Answer) - 15 days after
the month of operation
chapter 17-550 states that the supplier of water shall maintain a minimum free chlorine residual of: -
(correct Answer) - 0.2 mg/l or its equivalent throughout the distribution system at all times.
for a system which collects at least 40 samples for month, to be in compliance with the MCL for total
coliform, no more that ______ of the samples collected can test positive for the month. - (correct
Answer) - 5% (or 2 samples)
if any routine or repeat sample is total coliform positive, the system shall analyze that sample for: -
(correct Answer) - fecal coliform or E. coli
following the disinfection of a newly developed well, a __________ survey must be conducted. the
survey requires collection of daily samples for total coliform for 20 or more days consecutive. - (correct
Answer) - bacteriological.
insoluble organic colloid system owes it stability to: - (correct Answer) - its small size and electrical
charge
the annular space between the well casing and the bore hole must be ____________ to prevent
contamination from surface or from poor quality aquifers that the bore intersects before reaching the
desired aquifer. - (correct Answer) - grouted
in certain costal areas, intrusion of sea water in to groundwater basin is most commonly caused by? -
(correct Answer) - over pumping from the ground basin
Riparian rights are acquired how? - (correct Answer) - with title to land bordering surface water
an underground layer of rock or soil that permeates the passage of water is called what? - (correct
Answer) - an aquifer
the first priority, from a public health perspective, is the production of what? - (correct Answer) - water
that is drinkable and free from bacteria and toxins
high color content in water would be indicative of all the following except : - (correct Answer) - a high PH
what is NOT a common practice in watershed management? - (correct Answer) - allow wastewater
discharges into the reservoir?
controlling taste and odor problems and organic loading within the reservoir may reduce or eliminate: -
(correct Answer) - activated carbon treatment
chemical control of both plankton and periphyton in domestic water supply reservoirs is primarily used
to prevent or control: - (correct Answer) - taste and odor problems resulting from algae blooms.
the three major water quality indicators that affect the efficiency of using copper sulfate as an algicide
are: - (correct Answer) - alkalinity, suspended matter, and water temperature.
during periods of thermal stratification and anaerobic conditions, water quality improvements are
obtained by: - (correct Answer) - the addition of dissolved oxygen
the most common chemical used to treat algae blooms is? - (correct Answer) - cuso 4
the purpose of screening devices is to remove: - (correct Answer) - large solids
in early winter, when the surface of a lake or reservoir cools to the same temperature as the lower
layers, the reservoir destratifies, causing: - (correct Answer) - turnover to occur.
the following conditions would be most conducive to triggering an algae bloom: - (correct Answer) -
available nutrients such as nitrogen and phosphorous and abundant sunlight.
the MCL for chlorides is? - (correct Answer) - 250 mg/l
the MCL for iron is? - (correct Answer) - 0.3 mg/l
the MCL for dissolved solids is? - (correct Answer) - 500 mg/l
, the disinfection residual necessary in the distribution system under the surface water treatment rule is: -
(correct Answer) - 0.2 mg/l 100% of the time
the correct statement pertaining to potable water is: - (correct Answer) - iron is a secondary regulation
with an MCL of 0.3 mg/l
the primary MCL for tthm is : - (correct Answer) - .080 mg/l or 80 ppb
the secondary MCL for fluoride is: - (correct Answer) - 2.0 mg/l
the correct statement pertaining to potable water is : - (correct Answer) - odor is a secondary regulation
with an MCL of 3 TON (threshold odor number)
the primary MCL for tthm is : - (correct Answer) - .080 mg/l or 80 ppb
the following does not fall under the category of secondary drinking water standards: - (correct Answer)
- nitrate
concerning radionuclides, suppliers of water shall monitor at least: - (correct Answer) - once every 36
months
if a routine sample is total coliform positive, the system shall do all the following steps except: - (correct
Answer) - collect the repeat samples on different days
the MORs for public water systems shall be submitted to DER within: - (correct Answer) - 15 days after
the month of operation
chapter 17-550 states that the supplier of water shall maintain a minimum free chlorine residual of: -
(correct Answer) - 0.2 mg/l or its equivalent throughout the distribution system at all times.
for a system which collects at least 40 samples for month, to be in compliance with the MCL for total
coliform, no more that ______ of the samples collected can test positive for the month. - (correct
Answer) - 5% (or 2 samples)
if any routine or repeat sample is total coliform positive, the system shall analyze that sample for: -
(correct Answer) - fecal coliform or E. coli
following the disinfection of a newly developed well, a __________ survey must be conducted. the
survey requires collection of daily samples for total coliform for 20 or more days consecutive. - (correct
Answer) - bacteriological.
insoluble organic colloid system owes it stability to: - (correct Answer) - its small size and electrical
charge
the annular space between the well casing and the bore hole must be ____________ to prevent
contamination from surface or from poor quality aquifers that the bore intersects before reaching the
desired aquifer. - (correct Answer) - grouted
