STUDY QUESTIONS FOR WATER DISTRIBUTION MANAGER
1 & 2 TEST WITH LATEST UPDATED (QUESTIONS AND
ANSWERS) ALREADY PASSED!
Which agency sets legal limits on the concentration levels of harmful
contaminants in potable water distributed to customers? Correct
Answers United States Environmental Protection Agency
The number of monthly distribution system bacteriological samples
required is: Correct Answers Based on population served
What is the maximum contaminant level for total trihalomethanes
(TTHM) in the United States? Correct Answers 0.080 mg/L
Under the Surface Water Treatment Rule, disinfection residuals must be
collected at the same location in the distribution system as Correct
Answers Coliform samples
Iron can cause "red water" and thus customer complaints when its
concentration is above its secondary maximum contaminant level of
Correct Answers 0.30 mg/L
The goal of the Surface Drinking Water Act is for each (blank) to accept
primary enforcement responsibility (primacy) for the operation of the
state's drinking water program. Correct Answers State
,What is the objective of the Total Coliform Rule? Correct Answers To
promote routine surveillance of distribution system water quality to
search for fecal matter and/or disease-causing bacteria.
Which agency sets standards on the concentration levels of harmful
contaminants in drinking water? Correct Answers US Environmental
Protection Agency (USEPA)
Explain the difference between the different tiers of violations. Which is
the most serious? Correct Answers Tier 1: an acute MCL violation
requiring public within 24 hours
Tier 2: notification must occur within 30 days
Tier 3: requires notification within 1 year
Tier 1 is the most serious
A positive E. coli test must be reported to the primacy health agency
within what time period? Correct Answers 24 hours
How is the required number of monthly bacteriological samples
determined? Correct Answers Number of samples is based on the
population served
What is the action level for lead in first-draw samples taken from
customer taps? Correct Answers 0.015 mg/L
, A water system is designated a community public water system if it
serves how many homes? Correct Answers 15 or more
What authority provides specific water sampling instructions? Correct
Answers The state primacy agency
According to the Lead and Copper Rule, what is the action level for the
lead? Correct Answers 0.015 mg/L
Head is measured in Correct Answers Feet
A plat is Correct Answers A map
At which time of day is the age of the water stored in the distribution
system the highest/oldest? Correct Answers Early morning
Water mains should primarily be sized based on Correct Answers
Adequate fire flow at an appropriate pressure
The most desirable residential pressure ranges from Correct Answers
50-75 psi (345 to 517 kPa)
Domestic water use includes water that is supplied to residential areas,
(blank) , and institutional facilities. Correct Answers Commercial
districts
1 & 2 TEST WITH LATEST UPDATED (QUESTIONS AND
ANSWERS) ALREADY PASSED!
Which agency sets legal limits on the concentration levels of harmful
contaminants in potable water distributed to customers? Correct
Answers United States Environmental Protection Agency
The number of monthly distribution system bacteriological samples
required is: Correct Answers Based on population served
What is the maximum contaminant level for total trihalomethanes
(TTHM) in the United States? Correct Answers 0.080 mg/L
Under the Surface Water Treatment Rule, disinfection residuals must be
collected at the same location in the distribution system as Correct
Answers Coliform samples
Iron can cause "red water" and thus customer complaints when its
concentration is above its secondary maximum contaminant level of
Correct Answers 0.30 mg/L
The goal of the Surface Drinking Water Act is for each (blank) to accept
primary enforcement responsibility (primacy) for the operation of the
state's drinking water program. Correct Answers State
,What is the objective of the Total Coliform Rule? Correct Answers To
promote routine surveillance of distribution system water quality to
search for fecal matter and/or disease-causing bacteria.
Which agency sets standards on the concentration levels of harmful
contaminants in drinking water? Correct Answers US Environmental
Protection Agency (USEPA)
Explain the difference between the different tiers of violations. Which is
the most serious? Correct Answers Tier 1: an acute MCL violation
requiring public within 24 hours
Tier 2: notification must occur within 30 days
Tier 3: requires notification within 1 year
Tier 1 is the most serious
A positive E. coli test must be reported to the primacy health agency
within what time period? Correct Answers 24 hours
How is the required number of monthly bacteriological samples
determined? Correct Answers Number of samples is based on the
population served
What is the action level for lead in first-draw samples taken from
customer taps? Correct Answers 0.015 mg/L
, A water system is designated a community public water system if it
serves how many homes? Correct Answers 15 or more
What authority provides specific water sampling instructions? Correct
Answers The state primacy agency
According to the Lead and Copper Rule, what is the action level for the
lead? Correct Answers 0.015 mg/L
Head is measured in Correct Answers Feet
A plat is Correct Answers A map
At which time of day is the age of the water stored in the distribution
system the highest/oldest? Correct Answers Early morning
Water mains should primarily be sized based on Correct Answers
Adequate fire flow at an appropriate pressure
The most desirable residential pressure ranges from Correct Answers
50-75 psi (345 to 517 kPa)
Domestic water use includes water that is supplied to residential areas,
(blank) , and institutional facilities. Correct Answers Commercial
districts
