Exam Review - Chapter 2

Question 1

What are 4 elements for safe drinking water?

Answer 1

1. Right equipment
2. Well designed and constructed water plant
3. Caring & competent operators - ongoing and effective training
4. Sound policies and procedures

Question 2

What are 5 roles of operators?

Answer 2

1. Apply knowledge & experience to protect public health.
2. Follow utility’s policies and procedures
3. Understand and meet regulatory requirements.
4. Recognize abnormal situations and take appropriate action
5. Recognized & remove hazards and take other steps to improve safety.

Question 3

To understand the impacts of water quality on public health you need to be familiar with the contaminants. Name 3:

Answer 3

1. Health based standards: microbiological, chemical, and radiological
2. Ontario Drinking - Water Quality Standards O. Reg. 169/03
3. Establish limits on contaminants in drinking water

Question 4

What does pathogen mean?

Answer 4

Disease-causing

Question 5

Name 4 pathogenic organisms

Answer 5

1. Bacteria
2. Emerging Pathogens
3. Viruses
4. Protozoa

Question 6

Why are pathogens important? (2)

Answer 6

1. Public Health

2. Regulated

Question 7

True or False: Viruses are primarily from sewage contamination.

Answer 7

TRUE

Question 8

Name 2 types of viruses:

Answer 8

Hepatitis A
Norovirus
Rotavirus

Question 9

True or False: Bacteria are usually unicellular microorganisms?

Answer 9

TRUE

example: E.Coli

Question 10

True or False: All bacteria are pathogens

Answer 10

FALSE: not all

Question 11

True or False: Bacteria are used as “indicator organisms”.

Answer 11

TRUE

Question 12

True or False: Protozao have a strong cell wall

Answer 12

FALSE: single-celled organisms that LACK a cell wall.

Question 13

What are 2 major drinking water concerns:

Answer 13

1. Cryptosporidium (cryptos)

2. Giardia lamblia

Question 14

True or false: Giardia is the cause of “Beaver fever”

Answer 14

True: Giardia is found in wild and domestic animals and humans

Question 15

True or False: The presence of indicator organisms is a sign that pathogens are or could be present.

Answer 15

True:

also, if indicator organisms are absent, disease producing organisms are probably also absent.

Question 16

Name 3 advantages of Indicator Organisms:

Answer 16

1. Easily & rapidly detected in the lab
2. Pathogenic microorganisms can be difficult to detect, tests can be time consuming & costly
3. Impossible to test for all types of pathogens

Question 17

Name 3 Indicator Organisms

Answer 17

1. Total Coliforms
2. E.coli
3. Heterotrophic

Question 18

Chemical Contaminants: What are 2 parameters in O. Reg. 170/30 that must be monitored?

Answer 18

1. Inorganic Parameters (Schedule 23)

2. Organic Parameters (Schedule 24)

Question 19

Name 4 Chemical Contaminants:

Answer 19

1. sodium
2. benzene
3. fluoride
4. pesticides
5. Nitrate/nitrite
6. Heavy Metals
7. THMs