WSO WATER DISTRIBUTION GRADES 1 & 2 EXAM 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 (USEPA)
The number of monthly distribution system bacteriological samples
required is Correct Answers Based on the Population Served
What is the maximum contaminant level (MCL) 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 Ace is for each _____________
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/pr disease-causing bacteria.
Which agency sets standards on the concentration levels of harmful
contaminants of drinking water? Correct Answers US Environmental
Protection Agency
Explain the difference between the different tiers of violations. Which
one is the most serious? Correct Answers Tier 1 is an acute MCL
violation requiring public notification within 24 hours.
Tier 2 notification must occur within 30 days.
Tier 3 requires notification within 1 year.
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 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
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? 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
to 75 psi
Domestic water use includes water that is supplied to residential areas,
________________, and institutional facilities. Correct Answers
Commercial districts
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 (USEPA)
The number of monthly distribution system bacteriological samples
required is Correct Answers Based on the Population Served
What is the maximum contaminant level (MCL) 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 Ace is for each _____________
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/pr disease-causing bacteria.
Which agency sets standards on the concentration levels of harmful
contaminants of drinking water? Correct Answers US Environmental
Protection Agency
Explain the difference between the different tiers of violations. Which
one is the most serious? Correct Answers Tier 1 is an acute MCL
violation requiring public notification within 24 hours.
Tier 2 notification must occur within 30 days.
Tier 3 requires notification within 1 year.
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 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
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? 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
to 75 psi
Domestic water use includes water that is supplied to residential areas,
________________, and institutional facilities. Correct Answers
Commercial districts
