CLASS B Water Operator Exam 2026/2027 Questions
And Correct Answers Graded A+
the first priority, from a public health perspective, is the production of what?
water that is drinkable and free from bacteria and toxins
high color content in water would be indicative of all the following except :
a high PH
what is NOT a common practice in watershed management?
allow wastewater discharges into the reservoir?
controlling taste and odor problems and organic loading within the reservoir may
reduce or eliminate:
activated carbon treatment
chemical control of both plankton and periphyton in domestic water supply
reservoirs is primarily used to prevent or control:
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:
alkalinity, suspended matter, and water temperature.
during periods of thermal stratification and anaerobic conditions, water quality
improvements are obtained by:
the addition of dissolved oxygen
the most common chemical used to treat algae blooms is?
cuso 4
the purpose of screening devices is to remove:
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:
turnover to occur.
the following conditions would be most conducive to triggering an algae bloom:
available nutrients such as nitrogen and phosphorous and abundant sunlight.
,the MCL for chlorides is?
250 mg/l
the MCL for iron is?
0.3 mg/l
the MCL for dissolved solids is?
500 mg/l
in certain costal areas, intrusion of sea water in to groundwater basin is most
commonly caused by?
over pumping from the ground basin
Riparian rights are acquired how?
with title to land bordering surface water
an underground layer of rock or soil that permeates the passage of water is called
what?
an aquifer
, the disinfection residual necessary in the distribution system under the surface
water treatment rule is:
0.2 mg/l 100% of the time
the correct statement pertaining to potable water is:
iron is a secondary regulation with an MCL of 0.3 mg/l
the primary MCL for tthm is :
.080 mg/l or 80 ppb
the secondary MCL for fluoride is:
2.0 mg/l
the correct statement pertaining to potable water is :
odor is a secondary regulation with an MCL of 3 TON (threshold odor number)
the primary MCL for tthm is :
.080 mg/l or 80 ppb
And Correct Answers Graded A+
the first priority, from a public health perspective, is the production of what?
water that is drinkable and free from bacteria and toxins
high color content in water would be indicative of all the following except :
a high PH
what is NOT a common practice in watershed management?
allow wastewater discharges into the reservoir?
controlling taste and odor problems and organic loading within the reservoir may
reduce or eliminate:
activated carbon treatment
chemical control of both plankton and periphyton in domestic water supply
reservoirs is primarily used to prevent or control:
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:
alkalinity, suspended matter, and water temperature.
during periods of thermal stratification and anaerobic conditions, water quality
improvements are obtained by:
the addition of dissolved oxygen
the most common chemical used to treat algae blooms is?
cuso 4
the purpose of screening devices is to remove:
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:
turnover to occur.
the following conditions would be most conducive to triggering an algae bloom:
available nutrients such as nitrogen and phosphorous and abundant sunlight.
,the MCL for chlorides is?
250 mg/l
the MCL for iron is?
0.3 mg/l
the MCL for dissolved solids is?
500 mg/l
in certain costal areas, intrusion of sea water in to groundwater basin is most
commonly caused by?
over pumping from the ground basin
Riparian rights are acquired how?
with title to land bordering surface water
an underground layer of rock or soil that permeates the passage of water is called
what?
an aquifer
, the disinfection residual necessary in the distribution system under the surface
water treatment rule is:
0.2 mg/l 100% of the time
the correct statement pertaining to potable water is:
iron is a secondary regulation with an MCL of 0.3 mg/l
the primary MCL for tthm is :
.080 mg/l or 80 ppb
the secondary MCL for fluoride is:
2.0 mg/l
the correct statement pertaining to potable water is :
odor is a secondary regulation with an MCL of 3 TON (threshold odor number)
the primary MCL for tthm is :
.080 mg/l or 80 ppb
