CLASS A WATER OPERATOR EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+
Hard Water - ANSWERS-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) - ANSWERS-
The highest level of disinfectant allowed in drinking water.
Standards set by the US EPA
,Microbial Pathogens - ANSWERS-Micro-organisms that
cause disease
Safe Drinking Water Act (SDWA) - ANSWERS-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 - ANSWERS-8.34 pounds
Ch 1- The average domestic water usage per person per day
is usually somewhere in the range of - ANSWERS-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 - ANSWERS-Lab Results
Ch 1 - The most important duty of a water plant operator is
to - ANSWERS-Help to protect the health and well-being of
the community
Apparent color - ANSWERS-The color visible in water
,True color - ANSWERS-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 - ANSWERS-Particles suspended in water. These
particles can be removed through filtration. This is
considered a primary contaminant by the EPA. These
particles can surround and protect harmful microorganisms
from being destroyed by chlorination.
Nephelometric Turbidity Unit (NTUs) - ANSWERS-A measure
of turbidity
H+ - ANSWERS-hydrogen ion
OH- - ANSWERS-hydroxide ion
Carbonate Hardness (CH) - ANSWERS-Temporary hardness
which is always alkalinity. Calcium and magnesium ion
combine with carbonate, bicarbonate, and hydroxide ions to
form carbonate hardness. Carbonate Hardness precipitates
out with heat.
, How many Training Hours and experience for a class D
Water Operator - ANSWERS-16 Hours Training and No
Experience
How many Training Hours and experience for a class C Water
Operator - ANSWERS-36 Hours Training and 1 year
Experience
How many Training Hours and experience for a class B
Water Operator - ANSWERS-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 - ANSWERS-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 - ANSWERS-32 Hours and no experience
How many Training Hours and experience for a Class B Lab
Operator - ANSWERS-32 hours of C and 32 hours of B and 6
months experience. ***associate in science can substitute
32hrs of C level training
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+
Hard Water - ANSWERS-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) - ANSWERS-
The highest level of disinfectant allowed in drinking water.
Standards set by the US EPA
,Microbial Pathogens - ANSWERS-Micro-organisms that
cause disease
Safe Drinking Water Act (SDWA) - ANSWERS-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 - ANSWERS-8.34 pounds
Ch 1- The average domestic water usage per person per day
is usually somewhere in the range of - ANSWERS-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 - ANSWERS-Lab Results
Ch 1 - The most important duty of a water plant operator is
to - ANSWERS-Help to protect the health and well-being of
the community
Apparent color - ANSWERS-The color visible in water
,True color - ANSWERS-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 - ANSWERS-Particles suspended in water. These
particles can be removed through filtration. This is
considered a primary contaminant by the EPA. These
particles can surround and protect harmful microorganisms
from being destroyed by chlorination.
Nephelometric Turbidity Unit (NTUs) - ANSWERS-A measure
of turbidity
H+ - ANSWERS-hydrogen ion
OH- - ANSWERS-hydroxide ion
Carbonate Hardness (CH) - ANSWERS-Temporary hardness
which is always alkalinity. Calcium and magnesium ion
combine with carbonate, bicarbonate, and hydroxide ions to
form carbonate hardness. Carbonate Hardness precipitates
out with heat.
, How many Training Hours and experience for a class D
Water Operator - ANSWERS-16 Hours Training and No
Experience
How many Training Hours and experience for a class C Water
Operator - ANSWERS-36 Hours Training and 1 year
Experience
How many Training Hours and experience for a class B
Water Operator - ANSWERS-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 - ANSWERS-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 - ANSWERS-32 Hours and no experience
How many Training Hours and experience for a Class B Lab
Operator - ANSWERS-32 hours of C and 32 hours of B and 6
months experience. ***associate in science can substitute
32hrs of C level training
