AWWA ABC Water Distribution Grades 1 & 2 Questions And Answers 100% Verified.
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AWWA ABC Water Distribution Grades 1 & 2
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AWWA ABC Water Distribution Grades 1 & 2
AWWA ABC Water Distribution Grades 1 & 2 Questions And Answers 100% Verified.
Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? - correct answer. US Environmental Protection Agency
The number of monthly d...
AWWA ABC Water Distribution Grades 1 &
2 Questions And Answers 100% Verified.
Which agency sets legal limits on the concentration levels of harmful contaminants in
potable water distributed to customers? - correct answer. US Environmental
Protection Agency
The number of monthly distributions system bacteriologiacal samples required is -
correct answer. Based on the population served
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united
States? - correct answer. 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 answer. coliform samples
Iron can cause "red water" and thus customer complaints when its concentration is
above its secondary maximum contaminant level of - correct answer. 0.30 mg/L
The goal of the Surface Drinking Water Act is for each ________ to accept primary
enforcement responsibility (primacy) for the operation of the state's drinking water
program. - correct answer. State
What is the objective of Total Coliform Rule? - correct answer. 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 answer. EPA
, Explain the difference between the different tiers of violations. Which tier is the most
serious? - correct answer. Tier 1 = 24 hours (most severe)
Tier 2= 30 days
Tier 3= 1 year
A positive E. Coli test must be reported to the primacy health agency within what time
period? - correct answer. 24 hours
How is the required number of monthly bacteriological samples determined? - correct
answer. Population served
What is the action level for lead in first-draw samples taken from customer taps? -
correct answer. 0.015 mg/L
A water system is designated a community public water system if it serves how many
homes? - correct answer. 15 or more
What authority provides specific water sampling instructions? - correct answer. The
state primacy agency
According to the Lead and Copper Rule, what is the action level for lead? - correct
answer. 0.015 mg/L
Head is measured in - correct answer. Feet
A plat is - correct answer. a map
At which time of the day is the age of the water stored in the distribution system the
highest? - correct answer. Early morning
Water mains should primarily be sized based on - correct answer. adequate fire flow
at an appropriate pressure
The most desirable residential pressure ranges from - correct answer. 50 to 75 psi
(345 to 517kPa)
Domestic water use includes water that is supplied to residential areas, ____________,
and institutional facilities. - correct answer. commercial districts
Riparian doctrine is sometimes called the "rule of - correct answer. reasonable
sharing."
During which season is water typically the highest? - correct answer. summer
Of the common types of distribution system, which type is considered least desirable? -
correct answer. Tree system
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