Chapter 4

Question 1

Pathogens are disease causing ________

Answer 1

Microorganisms

Question 2

Pathogens and diseases found in water are called _________

Answer 2

Water-borne

Question 3

If fecal waste from an infected person gets into a water supply, the illness ( can or cannot ) be transmitted to a healthy person

Answer 3

Can

Question 4

A waterborne disease that threatens humans is ________

Answer 4

Typhoid

Question 5

A certain group of bacteria is used to indicate the possible presence of a pathogen is the __________ group

Answer 5

Total Coliform

Question 6

The presence of fecal coliform in a water sample indicates fecal contamination from a _______or ________

Answer 6

Human / warm blooded animal

Question 7

The term _______ _________means fecal and non fecal coliform

Answer 7

Total Coliform

Question 8

Samples must be taken in sterile containers containg sodium thiosulfate which sequesters ________in the water

Answer 8

Chlorine

Question 9

The purpose of the sample site plan is to assure bacteriological samples are collected from _______service connections which are representative of the distribution system.

Answer 9

Active.

Question 10

When selecting a sample site, choose a non leaking faucet at least 18” above the ground and made of material that can be heated or withstand a chlorine solution or alcohol( true or false )

Answer 10

True

Question 11

If there is no chlorine _____at a faucet, do not sample, flush longer

Answer 11

Residual

Question 12

Bleach or alcohol requires _____ contact time than flaming to disinfect a faucet. ( less or more )

Answer 12

More

Question 13

Fill the Sample container completely full of water to be analyzed ( true or false )

Answer 13

False

Question 14

The required routine monthly bacteriological Sample must be marked ________

Answer 14

Distribution

Question 15

Fill out the submission form completely or possibly lose credit for the sample ( true or false )

Answer 15

True

Question 16

Get the sample to the lab within _____or it will be rejected.

Answer 16

30 Hours

Question 17

Keep the sample in ice or in a cooler prior to and during lab transport because heat stimulates bacterial growth ( true or false)

Answer 17

True

Question 18

A possible cause of bad Samples can be _________

Answer 18

Improper Flushing

Question 19

If a routine sample is positive, flush the positive sample point, check the chlorine residual, then re sample within ____ of notification

Answer 19

24 Hours

Question 20

Repeat samples must be taken at the _________within 5 connections upstream and within 5 connections down stream

Answer 20

Positive Point

Question 21

Collect all repeat samples on _____day

Answer 21

Same

Question 22

In the event of distribution pressure below ______psi, ______ outages, repeated bad samples or chlorine ______below minimum, special precautions must be instituted

Answer 22

20 / water / residual

Question 23

One by-product of chlorinated drinking water is _______, a suspected carcinogen when consumed in water over a lifetime

Answer 23

Trihalomethane

Question 24

To prevent the formation of THMS in surface water, chlorine is combined with ________forming chloramine , combined chlorine residual

Answer 24

Ammonia

Question 25

The primary limits refer to chemicals with maximum containment levels that ______ be exceeded ( Can or cannot )

Answer 25

Cannot

Question 26

At 0.8 to 1.0mg/l, fluoride reduces dental cavities, but in higher dosages >2.0mg/l can cause _______ of teeth over time

Answer 26

Mottling

Question 27

High nitrate or nitrite levels put infants at risk of ______ syndrome

Answer 27

Blue Baby

Question 28

Low doses of heavy metals such as lead and copper can cause damage to the central nervous system over time ( true or false )

Answer 28

True

Question 29

The action level for lead is ______mg/l and for copper it is _____mg/l

Answer 29

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