4/26/26, 8:46 AM Class A Water Operator Exam Questions & Answers | 100% Verified solutions (2026) UPDATE |2026!! STUDY GUIDE EXAM Flash…
Class A Water Operator Exam Questions &
Answers | 100% Verified solutions (2026) UPDATE
|2026!! STUDY GUIDE EXAM
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Terms in this set (161)
How many Training Hours and 16 Hours Training and No Experience
experience for a class D Water
Operator
How many Training Hours and 36 Hours Training and 1 year Experience
experience for a class C Water
Operator
How many Training Hours and 100 Hours Training and 3 years Experience (must
experience for a class B Water include 1 year of hands on experience)
Operator
How many Training Hours and 200 Hours Training and 5 years Experience (must
experience for a class A Water include 2 years of hands on experience)
Operator
How many Training Hours and 32 Hours and no experience
experience for a Class C Lab
Operator
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,4/26/26, 8:46 AM Class A Water Operator Exam Questions & Answers | 100% Verified solutions (2026) UPDATE |2026!! STUDY GUIDE EXAM Flash…
How many Training Hours and 32 hours of C and 32 hours of B and 6 months
experience for a Class B Lab experience. ***associate in science can substitute
Operator 32hrs of C level training
How many Training Hours and 32 hours of B and 1 year experience. ***Must
experience for a Class A Lab include a Bachelor in science
Operator
How many Training Hours and 36hours and 1 year experience
experience for a Class C Distribution
Operator
How many Training Hours and 8 hours and no training.
experience for a Distribution
Technician
Community Water System A public water supply that has at least 15 service
connections or serves 25 or more persons on a
regular basis
Primary Contaminants Contaminants identifies by the EPA as harmful to
umal health
Maximum Containment Level (MCL) The level in which contaminants must not exceed
or public notification is required.
Cryptosporidium A microsocpic parasite that can be found in water.
It produces cysts that are very resistant to harsh
environmental conditions. It is responsible for
intestinal illness called cryptosporidiosis.
Symptoms include diarrhea, cramps, gas, bodily
discomfort, fatigue, and weight loss. Occurs one
week after exposure and can last for 1-4 weeks
https://quizlet.com/1172679987/class-a-water-operator-exam-questions-answers-100-verified-solutions-2026-update-2026-study-guide-exam-flash-ca… 2/23
, 4/26/26, 8:46 AM Class A Water Operator Exam Questions & Answers | 100% Verified solutions (2026) UPDATE |2026!! STUDY GUIDE EXAM Flash…
Disinfection Profiling A water system assesses the level of disinfection
currently provided and then determines the impact
a proposed change in disinfection practice would
have.
E. coli A bacterium that is commonly used as an indicator
of human health risk from harmful micro organisms
that can be present in water. Symptoms include
sever cramps and diarrhea. Blood is often seen in
the stool. Symptoms begin 1-9 days after exposure
and last a week or less.
Giardia A microscopic parasite that can be found in water.
It produces cysts that are resistant to harsh
environmental conditions. Giardia causes intestinal
illness called giardiasis. Symptoms simular to
cryptosporidiosis. Vomition, chills, headache and
fever may also occur. Symptoms begin one week
after exposure and can last up to a month.
Hard Water A characteristic of water caused mainly by the salts
of calcium (Ca++) and magnesium (Mg++).
Undesirable due to formation of soap curds,
increase use of soap, and scale deposits in boilers
and water heaters. Defines as having hardness of
100mg/L or greater
Maximum Residual Disinfectant Level The highest level of disinfectant allowed in drinking
(MDRLs) water. Standards set by the US EPA
Microbial Pathogens Micro-organisms that cause disease
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Class A Water Operator Exam Questions &
Answers | 100% Verified solutions (2026) UPDATE
|2026!! STUDY GUIDE EXAM
Save Groups
Terms in this set (161)
How many Training Hours and 16 Hours Training and No Experience
experience for a class D Water
Operator
How many Training Hours and 36 Hours Training and 1 year Experience
experience for a class C Water
Operator
How many Training Hours and 100 Hours Training and 3 years Experience (must
experience for a class B Water include 1 year of hands on experience)
Operator
How many Training Hours and 200 Hours Training and 5 years Experience (must
experience for a class A Water include 2 years of hands on experience)
Operator
How many Training Hours and 32 Hours and no experience
experience for a Class C Lab
Operator
https://quizlet.com/1172679987/class-a-water-operator-exam-questions-answers-100-verified-solutions-2026-update-2026-study-guide-exam-flash-ca… 1/23
,4/26/26, 8:46 AM Class A Water Operator Exam Questions & Answers | 100% Verified solutions (2026) UPDATE |2026!! STUDY GUIDE EXAM Flash…
How many Training Hours and 32 hours of C and 32 hours of B and 6 months
experience for a Class B Lab experience. ***associate in science can substitute
Operator 32hrs of C level training
How many Training Hours and 32 hours of B and 1 year experience. ***Must
experience for a Class A Lab include a Bachelor in science
Operator
How many Training Hours and 36hours and 1 year experience
experience for a Class C Distribution
Operator
How many Training Hours and 8 hours and no training.
experience for a Distribution
Technician
Community Water System A public water supply that has at least 15 service
connections or serves 25 or more persons on a
regular basis
Primary Contaminants Contaminants identifies by the EPA as harmful to
umal health
Maximum Containment Level (MCL) The level in which contaminants must not exceed
or public notification is required.
Cryptosporidium A microsocpic parasite that can be found in water.
It produces cysts that are very resistant to harsh
environmental conditions. It is responsible for
intestinal illness called cryptosporidiosis.
Symptoms include diarrhea, cramps, gas, bodily
discomfort, fatigue, and weight loss. Occurs one
week after exposure and can last for 1-4 weeks
https://quizlet.com/1172679987/class-a-water-operator-exam-questions-answers-100-verified-solutions-2026-update-2026-study-guide-exam-flash-ca… 2/23
, 4/26/26, 8:46 AM Class A Water Operator Exam Questions & Answers | 100% Verified solutions (2026) UPDATE |2026!! STUDY GUIDE EXAM Flash…
Disinfection Profiling A water system assesses the level of disinfection
currently provided and then determines the impact
a proposed change in disinfection practice would
have.
E. coli A bacterium that is commonly used as an indicator
of human health risk from harmful micro organisms
that can be present in water. Symptoms include
sever cramps and diarrhea. Blood is often seen in
the stool. Symptoms begin 1-9 days after exposure
and last a week or less.
Giardia A microscopic parasite that can be found in water.
It produces cysts that are resistant to harsh
environmental conditions. Giardia causes intestinal
illness called giardiasis. Symptoms simular to
cryptosporidiosis. Vomition, chills, headache and
fever may also occur. Symptoms begin one week
after exposure and can last up to a month.
Hard Water A characteristic of water caused mainly by the salts
of calcium (Ca++) and magnesium (Mg++).
Undesirable due to formation of soap curds,
increase use of soap, and scale deposits in boilers
and water heaters. Defines as having hardness of
100mg/L or greater
Maximum Residual Disinfectant Level The highest level of disinfectant allowed in drinking
(MDRLs) water. Standards set by the US EPA
Microbial Pathogens Micro-organisms that cause disease
https://quizlet.com/1172679987/class-a-water-operator-exam-questions-answers-100-verified-solutions-2026-update-2026-study-guide-exam-flash-ca… 3/23
