Class A Water Operator UPDATED
ACTUAL Exam Questions and CORRECT
Answers
How many Training Hours and experience for a class D Water Operator - CORRECT
ANSWER 16 Hours Training and No Experience
How many Training Hours and experience for a class C Water Operator - CORRECT
ANSWER 36 Hours Training and 1 year Experience
How many Training Hours and experience for a class B Water Operator - CORRECT
ANSWER 100 Hours Training and 3 years Experience (must include 1 year of hands on
experience)
How many Training Hours and experience for a class A Water Operator - CORRECT
ANSWER 200 Hours Training and 5 years Experience (must include 2 years of hands on
experience)
How many Training Hours and experience for a Class C Lab Operator - CORRECT
ANSWER 32 Hours and no experience
How many Training Hours and experience for a Class B Lab Operator - CORRECT
ANSWER 32 hours of C and 32 hours of B and 6 months experience. ***associate in
science can substitute 32hrs of C level training
How many Training Hours and experience for a Class A Lab Operator - CORRECT
ANSWER 32 hours of B and 1 year experience. ***Must include a Bachelor in science
How many Training Hours and experience for a Class C Distribution Operator - CORRECT
ANSWER 36hours and 1 year experience
,How many Training Hours and experience for a Distribution Technician - CORRECT
ANSWER 8 hours and no training.
Community Water System - CORRECT ANSWER A public water supply that has at least
15 service connections or serves 25 or more persons on a regular basis
Primary Contaminants - CORRECT ANSWER Contaminants identifies by the EPA as
harmful to umal health
Maximum Containment Level (MCL) - CORRECT ANSWER The level in which
contaminants must not exceed or public notification is required.
Cryptosporidium - CORRECT ANSWER 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
Disinfection Profiling - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 (MDRLs) - CORRECT ANSWER The highest
level of disinfectant allowed in drinking water. Standards set by the US EPA
Microbial Pathogens - CORRECT ANSWER Micro-organisms that cause disease
Safe Drinking Water Act (SDWA) - CORRECT ANSWER An Act passed by the US
Congress in 1974. It establishes a cooperative program among local, state, and federal agencies
to ensure safe drinking water for customers.
Ch 1 - One gallon of water weighs - CORRECT ANSWER 8.34 pounds
Ch 1- The average domestic water usage per person per day is usually somewhere in the range of
- CORRECT ANSWER 100-130 gallons
Ch 1 -Probably the most important source of information to use when implementing changes in
process control at a water plant is - CORRECT ANSWER Lab Results
Ch 1 - The most important duty of a water plant operator is to - CORRECT
ANSWER Help to protect the health and well-being of the community
Apparent color - CORRECT ANSWER The color visible in water
True color - CORRECT ANSWER Dissolved material contribution to color and is not
removed through simple filtration (i.e. coffee or tea). Measure in Color Units (CUs) using a clear
glass tube called a Nessler tub.
Turbidity - CORRECT ANSWER Particles suspended in water. These particles can be
removed through filtration. This is considered a primary contaminant by the EPA. These
ACTUAL Exam Questions and CORRECT
Answers
How many Training Hours and experience for a class D Water Operator - CORRECT
ANSWER 16 Hours Training and No Experience
How many Training Hours and experience for a class C Water Operator - CORRECT
ANSWER 36 Hours Training and 1 year Experience
How many Training Hours and experience for a class B Water Operator - CORRECT
ANSWER 100 Hours Training and 3 years Experience (must include 1 year of hands on
experience)
How many Training Hours and experience for a class A Water Operator - CORRECT
ANSWER 200 Hours Training and 5 years Experience (must include 2 years of hands on
experience)
How many Training Hours and experience for a Class C Lab Operator - CORRECT
ANSWER 32 Hours and no experience
How many Training Hours and experience for a Class B Lab Operator - CORRECT
ANSWER 32 hours of C and 32 hours of B and 6 months experience. ***associate in
science can substitute 32hrs of C level training
How many Training Hours and experience for a Class A Lab Operator - CORRECT
ANSWER 32 hours of B and 1 year experience. ***Must include a Bachelor in science
How many Training Hours and experience for a Class C Distribution Operator - CORRECT
ANSWER 36hours and 1 year experience
,How many Training Hours and experience for a Distribution Technician - CORRECT
ANSWER 8 hours and no training.
Community Water System - CORRECT ANSWER A public water supply that has at least
15 service connections or serves 25 or more persons on a regular basis
Primary Contaminants - CORRECT ANSWER Contaminants identifies by the EPA as
harmful to umal health
Maximum Containment Level (MCL) - CORRECT ANSWER The level in which
contaminants must not exceed or public notification is required.
Cryptosporidium - CORRECT ANSWER 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
Disinfection Profiling - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 (MDRLs) - CORRECT ANSWER The highest
level of disinfectant allowed in drinking water. Standards set by the US EPA
Microbial Pathogens - CORRECT ANSWER Micro-organisms that cause disease
Safe Drinking Water Act (SDWA) - CORRECT ANSWER An Act passed by the US
Congress in 1974. It establishes a cooperative program among local, state, and federal agencies
to ensure safe drinking water for customers.
Ch 1 - One gallon of water weighs - CORRECT ANSWER 8.34 pounds
Ch 1- The average domestic water usage per person per day is usually somewhere in the range of
- CORRECT ANSWER 100-130 gallons
Ch 1 -Probably the most important source of information to use when implementing changes in
process control at a water plant is - CORRECT ANSWER Lab Results
Ch 1 - The most important duty of a water plant operator is to - CORRECT
ANSWER Help to protect the health and well-being of the community
Apparent color - CORRECT ANSWER The color visible in water
True color - CORRECT ANSWER Dissolved material contribution to color and is not
removed through simple filtration (i.e. coffee or tea). Measure in Color Units (CUs) using a clear
glass tube called a Nessler tub.
Turbidity - CORRECT ANSWER Particles suspended in water. These particles can be
removed through filtration. This is considered a primary contaminant by the EPA. These
