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APA612S-Air Pollution and Noise-1ST Opp-Nov 2024 |
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f
nAmlBIA UnlVERSITY
OF SCIEnCE AnDTECHnOLOGY
FacultoyfHealthN, atural
ResourceasndApplied
Sciences
Schoool f HealthSciences
Departmentof Preventative
HealthSciences
13JacksonKauJeuaStreet T: +264612072970
Private Bag13388
F: +264612079970
Windhoek
E: dphs@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION: BACHELOROF ENVIRONMENTAL HEALTHSCIENCES
QUALIFICATIONCODE: 08BOHS
LEVEL:6
COURSE:AIR POLLUTIONAND NOISE
COURSECODE: APN612S
DATE: NOVEMBER 2024
SESSION: 2
DURATION: 3 HOURS
MARKS: 100
FIRSTOPPORTUNITY:QUESTION PAPER
EXAMINER:
MODERATOR:
Prof Omotayo Awofolu
Dr Larai Aku-Akai
INSTRUCTIONS
1. Answer all questions in the answer booklet provided.
2. Please write neatly and legibly.
3. Do not use the left side margin of the exam paper. This must be allowed for the
examiner.
4. No books, notes and other additional aids are allowed.
5. Mark all answers clearly with their respective question numbers.
PERMISSIBLEMATERIALS
1. Non-Programmable Calculator
ATTACHEMENTS
1. None
This paper consistsof 3 pages, including this front page
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SECTIONA:
25 MARKS
QUESTION 1:
[25 MARKS]
1.1 Particulate Matter (PM), called "fine particles," can cause serious respiratory
ailments in human beings when inhaled. Provide the characteristics of these
particles.
(4)
1.2 Some characteristics can be used to describe odour during measurement by
sensory technique. List these characteristics.
(4)
1.3 Learners at a high school are exposed to environmental noise from nearby
construction work at about 92 dB. Enumerate any five (S) possible effects of
the noise on the learners.
(5)
1.4 A resident in the Windhoek West neighbourhood complained about noise
emanating from another resident. In stages, list the process you will take to
investigate the noise.
(7)
1.5 (i). Explain the term "Photochemical Smog".
(2)
(ii). State any two (2) of its impacts on human health.
(3)
SECTION B:
QUESTION 2:
2.1 (i). Define the term "organoleptic method".
(ii). State its advantage over the chemical method.
[33 MARKS]
[33 MARKS]
(2)
(2)
2.2 EHSstudents were found to be exposed to a sound pressure level (SPL)of 50 µPa.
Assuming the human hearing threshold value is 20 µPa. Calculate the SPLin dB. (5)
2.3 Describe the process of measuring pollutant gas using the Bubbler System.
Explain your answer with a diagram.
(6)
2.4 State the desirable characteristics expected of all air sampling devices.
(10)
2.5 Some houses in a community are exposed to noise pollution from vehicles due
to their closeness to a highway. Explain any four (4) control measures you will
Propose to solve the noise pollution.
(8)
AIR POLLUTION AND NOISE {APN 612S)
1st opportunity November 2024
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SECTION C:
42 MARKS
QUESTION 3:
[42 MARKS]
3.1 Briefly describe the concept of the Natural Greenhouse Effect. Use an illustration
to further explain your answer.
(8)
3.2 Organisations/businesses can contribute to the issue of air pollution. State any
four (4) of these contributions.
(8)
3.3 There are situations where municipal bylaws allow for the broadcast of noise.
State any four (4) of these situations and give an example in each case.
(8)
3.4 (i). State the characteristics of carbon monoxide (CO)gas
(2)
(ii). Briefly explain the sources, environmental and human health effects of
carbon monoxide (CO)gas in the environment.
(6)
3.5 Briefly explain the following terms:
i. Statutory Law and Regulatory/Administrative Law.
(6)
ii. Give an example of the implementation of the law in each case.
(4)
END OF QUESTION PAPER
AIR POLLUTION AND NOISE (APN 612S)
1st Opportunity November 2024
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