Water Distribution Exam | 164
Questions and Answers Verified 100%
Correct
What is a Water Distribution System - ANSWER Water distribution system means those
components of a public water system regulated under 62-550, FAC used for human
consumption.
Viruses and bacteria that cause human illnesses are know as - ANSWER Pathogens
Water Treatment and disinfection does what? - ANSWER Removes and
"inactivates" pathogens
What is maintained in the WDS to prevent possible regrowth? - ANSWER Chlorine
Residual
What water borne illnesses and pathogens are of concern? - ANSWER Cholera
Dysentery
Typhoid
Gastroenteritis
Giardiasis
Hepatitis
What is the multiple barrier approach for protecting public health? - ANSWER Risk
Prevention
Risk Management
,Monitoring and compliance
Individual action
What is the Environmental Protection Agency responsible for? - ANSWER Federal agency
responsible for regulating drinking water quality.
Also responsible for enforcing the SWDA
-lists contaminatns
-Sets MCL
What is MCLs - ANSWER Maximum Contaminant Levels
MCL for disinfection byproduct Trihalomethane's - ANSWER .08 or TTHM<80 PPB
MCL for disinfection byproduct Haloacetic Acids(five) - ANSWER .06 or HAA5 <60 PPB
The DEP requires the number of distribution samples to be dependent on what?
- ANSWER population served
The DEP requires what post mark date? - ANSWER 10th of the following month
Anaerobic - ANSWER Lacking oxygen or no oxygen in environment
What is the Coliform group - ANSWER Coliform group is an indicator organism which is
usually present when pathogens are present.
, All aerobic bacteria that FERMENTS LACTOSE WITH GAS is formed when? -
ANSWER formed within 48 hours at 35 degrees C
Why is E-coli important? - ANSWER Bacteria that originates from human organ
can quickly spread disease and illness in human population.
The number of samples to take is based on what? - ANSWER Population served
How high do you fill a sample? - ANSWER To the fill line
What is present in sample bottles to neutralize chlorine? - ANSWER Sodium Thiosulfate
Samples must be received and analyzed within? and at what temp? - ANSWER 30
hours of collection and 8 hours from receipt.
4 degrees C or 39 F
Where should sample be taken from? - ANSWER One at the same site, once within 5
services upstream and once 5 services downstream.
Nitrate MCL - ANSWER 10 mg/l
Nitrite MCL - ANSWER 1 mg/l
Lead and copper samples must sit how long? - ANSWER Motionless for at least 6 hours
Lead action level and MCL - ANSWER AL - >0.015 mg/l
Questions and Answers Verified 100%
Correct
What is a Water Distribution System - ANSWER Water distribution system means those
components of a public water system regulated under 62-550, FAC used for human
consumption.
Viruses and bacteria that cause human illnesses are know as - ANSWER Pathogens
Water Treatment and disinfection does what? - ANSWER Removes and
"inactivates" pathogens
What is maintained in the WDS to prevent possible regrowth? - ANSWER Chlorine
Residual
What water borne illnesses and pathogens are of concern? - ANSWER Cholera
Dysentery
Typhoid
Gastroenteritis
Giardiasis
Hepatitis
What is the multiple barrier approach for protecting public health? - ANSWER Risk
Prevention
Risk Management
,Monitoring and compliance
Individual action
What is the Environmental Protection Agency responsible for? - ANSWER Federal agency
responsible for regulating drinking water quality.
Also responsible for enforcing the SWDA
-lists contaminatns
-Sets MCL
What is MCLs - ANSWER Maximum Contaminant Levels
MCL for disinfection byproduct Trihalomethane's - ANSWER .08 or TTHM<80 PPB
MCL for disinfection byproduct Haloacetic Acids(five) - ANSWER .06 or HAA5 <60 PPB
The DEP requires the number of distribution samples to be dependent on what?
- ANSWER population served
The DEP requires what post mark date? - ANSWER 10th of the following month
Anaerobic - ANSWER Lacking oxygen or no oxygen in environment
What is the Coliform group - ANSWER Coliform group is an indicator organism which is
usually present when pathogens are present.
, All aerobic bacteria that FERMENTS LACTOSE WITH GAS is formed when? -
ANSWER formed within 48 hours at 35 degrees C
Why is E-coli important? - ANSWER Bacteria that originates from human organ
can quickly spread disease and illness in human population.
The number of samples to take is based on what? - ANSWER Population served
How high do you fill a sample? - ANSWER To the fill line
What is present in sample bottles to neutralize chlorine? - ANSWER Sodium Thiosulfate
Samples must be received and analyzed within? and at what temp? - ANSWER 30
hours of collection and 8 hours from receipt.
4 degrees C or 39 F
Where should sample be taken from? - ANSWER One at the same site, once within 5
services upstream and once 5 services downstream.
Nitrate MCL - ANSWER 10 mg/l
Nitrite MCL - ANSWER 1 mg/l
Lead and copper samples must sit how long? - ANSWER Motionless for at least 6 hours
Lead action level and MCL - ANSWER AL - >0.015 mg/l
