Quiz 1

Question 1

Percentage of waer used for drinking out of total domestic use of water

Answer 1

10%

Question 2

Primary Treatment gets rid of ?

Answer 2

Plastics, Oil/fats/grease, sand/grit

Question 3

Secondary Treatment gets rid of?

Answer 3

Soluble Organic Matter

Question 4

Tertiary Treatment gets rid of?

Answer 4

Nitrogen and Phosphorus

Question 5

4 areas of potable water treatment objectives

Answer 5

Pathogenic Microorganisms, Toxic Inorganic Contaminants, Toxic organic Contaminants, physical characteristics

Question 6

5 areas of non-potable water treatment objectives

Answer 6

BOD/TSS, Chlorine Residual, Turbidity, Total Coliform, pH

Question 7

3 kinds of pathogens

Answer 7

Parasites, Bacteria, Enteric Viruses

Question 8

What are indicator microorganisms

Answer 8

microorganisms that dont typically affect human health but are present in large numbers in raw water sources, so they are easily detectable.

Question 9

some indicator microorganisms?

Answer 9

E.Coli, total coliform, heterotrophic bacteria (causes biofims)

Question 10

purpose of indicator microrganisms

Answer 10

1. determine the effectiveness of disinfection method

2. monitor after treatment

Question 11

3 criteria for contaminants that are included in the CDWQG

Answer 11

1. Exposure could lead to adverse ehalth effects
2. contaminant frequently found in water source
3. contaminant could be detected in source water and could affect humans

Question 12

3 types of objectives in the CDWQG-

Answer 12

MAC(Maximum Acceptable Concentration), AO(Aesthetic Objective), OG(Operational Guidance)

Question 13

waster water effluent regulations (WESR) 4 objectives

Answer 13

BOD, TSS, Residual chlorine, unionized ammonia

Question 14

Environmental management act (MWR) regulates what?

Answer 14

the required quality of the treated effluent and the conditions of the receiving environment

Question 15

what is the relevance of the IDZ

Answer 15

Initial Dilution Zone - the effluent regulations are based on the concentration of contaminants at the EDGE of this initial dilution zone within the water body.

Question 16

The initial dilution is affected by 2 components:

Answer 16

1. Initial discharge velocity of the effluent

2. Density gradient between the receiving water body and the effluent

Question 17

Color stains in water are caused by ?

Answer 17

Manganese and Copper

Question 18

Scaling in pipes is caused by?

Answer 18

Calcium, Magnesium

Question 19

What is 4-3-2-1-0 in water treatment

Answer 19

4-log removal of viruses
3-log removal of pathogens
2 barriers to disinfect
1-NTU turbidity or less
0-total coliforms
DBP - less than regulations

Question 20

what is the multi barrier approach?

Answer 20

The consideration of the protection of water source, adequate treatment, and maintained distribution to safeguard public health

Question 21

3 DBPs

Answer 21

THM, NDMA, HAA