MINNESOTA CLASS D WATER
EXAM
What is the minimum waterman pipe diameter for fire protection -
ANSWERS-6 in
The highest levels of lead are found - ANSWERS-after the water
stands in the plumbing system
the minimum distance allowed between municipal well and buried
sewer is - ANSWERS-50 feet
sodium thiosulfate is used to - ANSWERS-neutralize chlorine
residual
distribution system pressure during a fire should never drop below -
ANSWERS-20 psi
The difference between the amount of residual chlorine found by
testing at distant points of the ditribution system is - ANSWERS-
chlorine de mand
a positive languire index reading means the water is - ANSWERS-
scaling
,the purpose of adding ammonia to drinking water is to - ANSWERS-
form combined chlorine residual
a device used to check flows in a distribution system is called -
ANSWERS-Pitot gauge
High nitrates contents ins ater can affect - ANSWERS-infants
Carbon dioxide in water will do which of the following - ANSWERS-
Lower pH
Shut off valves should be located in a water main of a commercial
district at least every? - ANSWERS-500 feet
What happens if an operator passes ammonia vapor near a leaking
chlorine cylinder valve - ANSWERS-White smoke
A operator can find optimum coagulant dosage by - ANSWERS-
performing jar tests
which type of pump is commonly used for feeding chemicals -
ANSWERS-diaphragm
When both chlorine and polyphosphate are added to a well which
should be fed first - ANSWERS-polyphosphate
, Municipal community - ANSWERS-These systems are owned by a
municipality "The city of"
Nonmunicipal community - ANSWERS-A private party owns these
systems
Baby blue syndrome - ANSWERS-high nitrate levels
According to the Safe Drinking Water Act the basic definition of a
public water supply system is any water system that supplies water for
human consumption that serves: - ANSWERS-15 service connection
or over 25 persons for over 60 days a year
What federal law regulates public water supplies? - ANSWERS-Safe
Drinking Water Act
What cause water to move through pores in soil and rocks ? -
ANSWERS-Gravity
What are disease producing bacteria called? - ANSWERS-Pathogenic
A presence/absence coliform test utilizes - ANSWERS-color change
What are two main causes of harness in water? - ANSWERS-Calcium
and magnesium
EXAM
What is the minimum waterman pipe diameter for fire protection -
ANSWERS-6 in
The highest levels of lead are found - ANSWERS-after the water
stands in the plumbing system
the minimum distance allowed between municipal well and buried
sewer is - ANSWERS-50 feet
sodium thiosulfate is used to - ANSWERS-neutralize chlorine
residual
distribution system pressure during a fire should never drop below -
ANSWERS-20 psi
The difference between the amount of residual chlorine found by
testing at distant points of the ditribution system is - ANSWERS-
chlorine de mand
a positive languire index reading means the water is - ANSWERS-
scaling
,the purpose of adding ammonia to drinking water is to - ANSWERS-
form combined chlorine residual
a device used to check flows in a distribution system is called -
ANSWERS-Pitot gauge
High nitrates contents ins ater can affect - ANSWERS-infants
Carbon dioxide in water will do which of the following - ANSWERS-
Lower pH
Shut off valves should be located in a water main of a commercial
district at least every? - ANSWERS-500 feet
What happens if an operator passes ammonia vapor near a leaking
chlorine cylinder valve - ANSWERS-White smoke
A operator can find optimum coagulant dosage by - ANSWERS-
performing jar tests
which type of pump is commonly used for feeding chemicals -
ANSWERS-diaphragm
When both chlorine and polyphosphate are added to a well which
should be fed first - ANSWERS-polyphosphate
, Municipal community - ANSWERS-These systems are owned by a
municipality "The city of"
Nonmunicipal community - ANSWERS-A private party owns these
systems
Baby blue syndrome - ANSWERS-high nitrate levels
According to the Safe Drinking Water Act the basic definition of a
public water supply system is any water system that supplies water for
human consumption that serves: - ANSWERS-15 service connection
or over 25 persons for over 60 days a year
What federal law regulates public water supplies? - ANSWERS-Safe
Drinking Water Act
What cause water to move through pores in soil and rocks ? -
ANSWERS-Gravity
What are disease producing bacteria called? - ANSWERS-Pathogenic
A presence/absence coliform test utilizes - ANSWERS-color change
What are two main causes of harness in water? - ANSWERS-Calcium
and magnesium
