AWWA ABC Water Distribution Grades 1 & 2 Exam Questions and Answers
19 views 0 purchase
Course
AWWA ABC Water Distribution Grade
Institution
AWWA ABC Water Distribution Grade
The number of monthly distributions system bacteriologiacal samples required is - ANSWER-Based on the population served
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - ANSWER-0.080 mg/L
Under the Surface Water Treatment Rule, disinfection residua...
AWWA ABC Water Distribution Grades
1 & 2 Exam Questions and Answers
Which agency sets legal limits on the concentration levels of harmful contaminants in
potable water distributed to customers? - ANSWER-US Environmental Protection
Agency
The number of monthly distributions system bacteriologiacal samples required is -
ANSWER-Based on the population served
What is the maximum contaminant level for total trihalomethanes (TTHM) in the
united States? - 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 - ANSWER-coliform samples
Iron can cause "red water" and thus customer complaints when its concentration is
above its secondary maximum contaminant level of - 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. - ANSWER-State
What is the objective of Total Coliform Rule? - 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? - ANSWER-EPA
Explain the difference between the different tiers of violations. Which tier is the most
serious? - 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? - ANSWER-24 hours
How is the required number of monthly bacteriological samples determined? -
ANSWER-Population served
What is the action level for lead in first-draw samples taken from customer taps? -
ANSWER-0.015 mg/L
, A water system is designated a community public water system if it serves how
many homes? - ANSWER-15 or more
What authority provides specific water sampling instructions? - ANSWER-The state
primacy agency
According to the Lead and Copper Rule, what is the action level for lead? -
ANSWER-0.015 mg/L
Head is measured in - ANSWER-Feet
A plat is - ANSWER-a map
At which time of the day is the age of the water stored in the distribution system the
highest? - ANSWER-Early morning
Water mains should primarily be sized based on - ANSWER-adequate fire flow at an
appropriate pressure
The most desirable residential pressure ranges from - ANSWER-50 to 75 psi (345 to
517kPa)
Domestic water use includes water that is supplied to residential areas,
____________, and institutional facilities. - ANSWER-commercial districts
Riparian doctrine is sometimes called the "rule of - ANSWER-reasonable sharing."
During which season is water typically the highest? - ANSWER-summer
Of the common types of distribution system, which type is considered least
desirable? - ANSWER-Tree system
The velocity of water is calculated as the quantity of water that flows through a pipe -
ANSWER-divided by the cross-sectional area of pipe
What is the term for water pressure in a main or in a container that is measured by a
gauge? - ANSWER-Gage pressure
In hydraulics, how is head expressed? - ANSWER-ft-pounds per pound
What is the term for pressure measured in terms of the height of water ( in meters or
feet)? - ANSWER-Head
What are three types of head? - ANSWER-Elevation head
velocity head
pressure head
The highest degree of protection for the exterior of a coating steel pipe is -
ANSWER-Cathodic protection
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller IMORA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.19. You're not tied to anything after your purchase.
