 |
WAS512S - WATER AND SANITATION - 2ND OPP- JAN 2023 |
|
|
1 Page 1 |
▲back to top |
NAMIBIA UNIVERSITYOF SCIENCEAND TECHNOLOGY
FACULTYOF HEALTH,APPLIEDSCIENCESand NATURALRESOURCES
DEPARTMENTOF HEALTHSCIENCES
QUALIFICATION : BACHELOR OF ENVIRONMENTAL HEALTH SCIENCES
QUALIFICATIONCODE: 08 BOHS
LEVEL: 5
COURSENAME: WATER AND SANITATION
DATE: JANUARY 2023
COURSECODE: WAS512S
SESSION: 2nd Opportunity
DURATION: 3 HOURS
MARKS: 100
SUPPLEMENTARY/SECONDOPPORTUNITYEXAMINATION QUESTION PAPER
EXAMINER
MRS MOUYELELEHAUFIKU
MODERATOR: MS CHARMAINE JANSEN
INSTRUCTIONS
1. Read all the questions carefully before answering
2. Marks for each question are indicated at the end of each question
3. Number the answers clearly.
4. Please ensure that your writing is legible, neat and presentable
PERMISSIBLEMATERIAL: NONE
THIS QUESTION PAPERCONSISTSOF 4 PAGES
(Including this front page)
1
|
|
2 Page 2 |
▲back to top |
SECTION A [20 MARKS]
QUESTION 1
1.0 Define the following terms/concepts in the context of Water and Sanitation.
1.1 Aquifer
1.2 Turbidity
1.3 Filtration
1.4 Ozonation
1.5 Sewerage
1.6 Sewer
1.7 Biological Oxygen Demand (BOD)
1.8 Anaerobic pond
1.9 Sanitation
1.10 Black water
[10]
[1]
[1]
[1]
[1]
[1]
[1]
[1]
[1]
[1]
[1]
QUESTION 2
2.0 Match the concepts in Column A to their most correct statement in Column B. Write on
your answer sheet the concept number and the letter representing the correct statement.
1 mark each
[10]
No COLUMN A
2.1 Impermeable
2.2 Colloids
2.3 Permeable
2.4 Soak pit
2.5 Helminths
2.6 Palatable water
2.7 Dysentery
2.8 Sedimentation
2.9 Distillation
2.10 Potable
COLUMN B
A
A hole dug in the ground serving as soak away
B
Not allowing passage of a liquid.
C
Water that is pleasant to drink because its taste is good but it
may not be safe to drink.
D
Parasitic worm that grow and multiply in sewage and wet soil
E
Able to be passed through or penetrated by a fluid.
F
Water is heated to steam, which is then cooled and collected
as liquid, leaving behind micro organisms
G
It is also called clarification
H
Diarrhoea with blood and mucus present.
I
Water that is safe for drinking, free from pathogens
J
These are low diameter particles which are responsible for
the turbidity or the colour of surface water
2
|
|
3 Page 3 |
▲back to top |
SECTION B [40 MARKS]
QUESTION 3
3.0 Differentiate between the following terms
3.1 Shallow well and deep well
3.2 Temporary and permanent hardness of water
3.3 Communicable and non-communicable disease
3.4 Water borne and water washed diseases, give also examples of each
QUESTION 4
4.1 Mention any five (5) advantages of ground water
4.2 State any five (5) advantages of rain water
[10]
[2]
[2]
[2]
[4]
[10]
[5]
[5]
QUESTION 5
[20]
5.1 Outline the reasons/instance for when to do water testing
[5]
5.2 In water treatment, sedimentation, or the removal by gravitational settling of suspended
particles heavier than water, is perhaps the most widely useful operation. Elaborate on
the factors that influence effective sedimentation processes:
[7]
5.3 Give any five (5) advantages of a Ventilated Improved Pit latrine
[5]
5.4 Briefly explain why sewage is a public health concern
[3]
3
|
|
4 Page 4 |
▲back to top |
SECTION C [40 MARKS]
QUESTION 6
6.0 There is an outbreak of schistosomiasis at your village. As an upcoming Environmental
Health Practitioner (EHP), you are asked to give health education on schistosomiasis
Elaborating on its definition, causes, how it is transmitted and prevention methods.
[20]
[20]
QUESTION 7
7.0 The sustainable development goal (SDG)6, as formulated by the United Nations Open
Working Group is to "Ensure availability and sustainable management of water and
sanitation for all. Summarize the four principles that are proposed to help achieve this
goal.
[20]
[20]
TOTAL MARKS= 100
4