Indiana Water Operator Certification Exam (Alliance of
Indiana Rural Water DSS/DSM/DSL WT1-WT5) Questions
With Complete Solutions
What is Maximum Contaminant Level (MCL)?
The highest level of a contaminant that is allowed in drinking
water. Maximum contaminant levels are set as close to
maximum contaminant level goals as
feasible, using the best available treatment technology and
taking
cost into consideration. Maximum contaminant levels are
enforceable standards.
What is the Maximum Contaminant Level Goal (MCLG)?
The level of a contaminant in drinking water below which there
is no known or
expected risk to health. Maximum contaminant level goals allow
for a
margin of safety and are non-enforceable public health goals.
What is the Maximum Residual Disinfection Level (MRDL)?
The highest level of a disinfectant allowed in drinking water.
There is convincing evidence that the addition of a disinfectant
is necessary for control of microbial contaminants.
What is the Maximum Residual Disinfectant Level Goal
(MRDLG)?
,The level of a drinking water disinfectant below which there is
no known or
expected risk to health. Maximum Residual Disinfectant Level
Goals
do not reflect the benefits of the use of disinfectants to control
microbial contaminants.
What is Meter Maintenance Program?
Scheduled program whereby meters
are tested and repaired before there is a noticeable drop in
consumption.
What is Milligrams Per Liter (Mg/L) Equivalent to?
Parts Per Million (PPM)
What does MRO stand for?
Monthly Report of Operations of Water Systems.
What does MSDS stand for?
Material safety data sheets; on hazardous products at site. It is
available to all employees.
What are Multi-Jet Meters?
These are used for measurement of low and intermediate flows,
like domestic use applications. They are typically available in
sizes from 5/8" through 2".
What is a municipally owned water system?
A municipally owned water system
is a public water system that is owned and operated by a local
,government or urban political unit with corporate status.
Normally the mayor or water board is the policy making body.
What is the National Primary Drinking Water Regulations
(NPDWR)?
These are legally enforceable standards that apply to public
water systems. Primary standards protect public health by
limiting the levels of contaminants in drinking water.
What are National Secondary Drinking Water Regulations
(NSDWR)?
These are non-enforceable guidelines
regulating contaminants that may cause cosmetic effects (such
as skin or tooth discoloration) or aesthetic effects (such as taste,
odor, or color) in drinking water. U.S. EPA recommends
secondary standards to water systems, but does not require
systems to comply. However,
states may choose to adopt them as enforceable standards.
What is Nephelometric Turbidity Unit (NTU)?
The unit that measures turbidity.
What is Nitrate?
Inorganic contaminant from runoff
from fertilizer use, leaching from septic tanks and sewage
systems, and erosion of natural deposits. Converts to Nitrite that
can cause Methemoglobinemia.
What is Nitrite?
, Inorganic contaminant from runoff
from fertilizer use, leaching from septic tanks and sewage
systems, and erosion of natural deposits. Can cause
Methemoglobinemia ("blue baby syndrome") in infants less than
6 months in age. This is life threatening without immediate
medical attention. Symptoms:
infant looks blue and has shortness of breath.
What is a Noncommunity Water System (NCWS)?
A public water system that serves the public, but does not serve
the same people year-round. There are two types of
noncommunity systems: Nontransient
Noncommunity Water Systems and Transient Noncommunity
Water
Systems.
What are Nontransient Noncommunity Water Systems
(NTNCWS)?
A public water system that serves the same 25 or more people
more than six
months per year, but not year-round. For example, a school with
its own water supply is considered a nontransient noncommunity
system.
What is a Notice of Violation (NOV)?
Issued to a public water system in
violation. Invites the system to attend a settlement conference to
discuss solutions. After receiving the Notice of Violation, the
Indiana Rural Water DSS/DSM/DSL WT1-WT5) Questions
With Complete Solutions
What is Maximum Contaminant Level (MCL)?
The highest level of a contaminant that is allowed in drinking
water. Maximum contaminant levels are set as close to
maximum contaminant level goals as
feasible, using the best available treatment technology and
taking
cost into consideration. Maximum contaminant levels are
enforceable standards.
What is the Maximum Contaminant Level Goal (MCLG)?
The level of a contaminant in drinking water below which there
is no known or
expected risk to health. Maximum contaminant level goals allow
for a
margin of safety and are non-enforceable public health goals.
What is the Maximum Residual Disinfection Level (MRDL)?
The highest level of a disinfectant allowed in drinking water.
There is convincing evidence that the addition of a disinfectant
is necessary for control of microbial contaminants.
What is the Maximum Residual Disinfectant Level Goal
(MRDLG)?
,The level of a drinking water disinfectant below which there is
no known or
expected risk to health. Maximum Residual Disinfectant Level
Goals
do not reflect the benefits of the use of disinfectants to control
microbial contaminants.
What is Meter Maintenance Program?
Scheduled program whereby meters
are tested and repaired before there is a noticeable drop in
consumption.
What is Milligrams Per Liter (Mg/L) Equivalent to?
Parts Per Million (PPM)
What does MRO stand for?
Monthly Report of Operations of Water Systems.
What does MSDS stand for?
Material safety data sheets; on hazardous products at site. It is
available to all employees.
What are Multi-Jet Meters?
These are used for measurement of low and intermediate flows,
like domestic use applications. They are typically available in
sizes from 5/8" through 2".
What is a municipally owned water system?
A municipally owned water system
is a public water system that is owned and operated by a local
,government or urban political unit with corporate status.
Normally the mayor or water board is the policy making body.
What is the National Primary Drinking Water Regulations
(NPDWR)?
These are legally enforceable standards that apply to public
water systems. Primary standards protect public health by
limiting the levels of contaminants in drinking water.
What are National Secondary Drinking Water Regulations
(NSDWR)?
These are non-enforceable guidelines
regulating contaminants that may cause cosmetic effects (such
as skin or tooth discoloration) or aesthetic effects (such as taste,
odor, or color) in drinking water. U.S. EPA recommends
secondary standards to water systems, but does not require
systems to comply. However,
states may choose to adopt them as enforceable standards.
What is Nephelometric Turbidity Unit (NTU)?
The unit that measures turbidity.
What is Nitrate?
Inorganic contaminant from runoff
from fertilizer use, leaching from septic tanks and sewage
systems, and erosion of natural deposits. Converts to Nitrite that
can cause Methemoglobinemia.
What is Nitrite?
, Inorganic contaminant from runoff
from fertilizer use, leaching from septic tanks and sewage
systems, and erosion of natural deposits. Can cause
Methemoglobinemia ("blue baby syndrome") in infants less than
6 months in age. This is life threatening without immediate
medical attention. Symptoms:
infant looks blue and has shortness of breath.
What is a Noncommunity Water System (NCWS)?
A public water system that serves the public, but does not serve
the same people year-round. There are two types of
noncommunity systems: Nontransient
Noncommunity Water Systems and Transient Noncommunity
Water
Systems.
What are Nontransient Noncommunity Water Systems
(NTNCWS)?
A public water system that serves the same 25 or more people
more than six
months per year, but not year-round. For example, a school with
its own water supply is considered a nontransient noncommunity
system.
What is a Notice of Violation (NOV)?
Issued to a public water system in
violation. Invites the system to attend a settlement conference to
discuss solutions. After receiving the Notice of Violation, the
