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APN612S-Air Pollution and Noise- 2nd Opp- Jan 2025 |
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11,911 nAm I Bl A UnlVERS ITY
OF SCIEnCE AnDTECHnOLOGY
FacultyofHealthN, atural
ResourceasndApplied
Sciences
Schoolof HealthSciences
Departmenot fPreventative
Health Sciences
13JacksonKaujeuaStreet T: •264612072970
Private Bagl33BB
F: •264 61207 9970
Windhoek
E: dphs@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION: BACHELOROF ENVIRONMENTALHEALTHSCIENCES
QUALIFICATION CODE: 08BOHS
LEVEL: 6
COURSE: AIR POLLUTIONAND NOISE
COURSECODE: APN612S
DATE: JANUARY2025
SESSION: 2
DURATION: 3 HOURS
MARKS: 100
SUPPLEMENTARY/SECOND OPPORTUNITY: QUESTION PAPER
EXAMINER:
MODERATOR:
Prof Omotayo Awofo/u
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.
PERMISSIBLE MATERIALS
1. None
ATTACHEMENTS
1. None
This paper consists of 3 pages including this front page
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QUESTION 1:
[20 MARKS]
1.1 List any four (4) characteristics that are required to be possessed by all air
sampling devices.
(4)
1.2 (i). Explain the terms passive and non-passive sampling systems.
(3)
(ii). State the advantages and disadvantages of each term
(3)
1.3 Briefly describe the following terms:
i. Photochemical smog
(4)
ii. Air pollution
(3)
iii. Organoleptic method
(3)
SECTIONB:
QUESTION 2:
[27 MARKS]
2.1 Environmental Health Inspectors found that students were exposed to
sound Pressure Level of 30 µPa. If the lowest human hearing threshold is
20 µPa. Determine the Sound Pressure level {SPL)in d(B).
(4)
2.2 Primary methods can be used to improve indoor air quality. State these
methods.
(6)
2.3 State any four (4) impacts of acid rain on the environment.
(8)
2.4 Air pollutants are generated at homes due to several activities. Provide any
six (6) sources of air pollutants that can be generated at homes.
(9)
SECTIONC: =--------.:Z::.--
-·--=- . -·--·--!212S--===----~--
QUESTION 3:
[17 MARKS]
3.1 Briefly explain the process of measuring gas using the Bubbler System
(S)
3.2 List and briefly explain the primary methods that can be used to improve the
quality of indoor air.
(6)
3.3 Explain the following terms:
i. Sleep disturbance
(3)
ii. Inlet manifold
(3)
AIR POLLUTION AND NOISE (APN 612S)
2nd Opportunity Jan 2024
2
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QUESTION 4:
[36 MARKS]
4.1 Differentiate between Statutory and Regulatory Laws and give an example of
Namibian law in each case.
(6)
4.2 Explain how businesses contribute to the problem of air pollution through
various activities
(8)
4.3 Discuss any five (5) impacts of global warming on human and environmental
Health.
(10)
4.4 Differentiate between the following terms giving example in each case:
i. Sound and Noise
(3)
ii. Weather and Climate
(3)
iii. Primary and secondary pollutants
(3)
iv. Wet deposition and dry deposition
rn
END OF QUESTION PAPER
AIR POLLUTION AND NOISE (APN 6125)
2nd Opportunity Jan 2024
3