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OSH612S - OCCUPATIONAL HEALTH AND SAFETY 2B - 2ND OPP - JANUARY 2025 |
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nAmlBIA UnlVERSITY
OF SCIEnCE
FacultoyfHealthN, atural
ResourceasndApplied
Sciences
Schoolof HealthSciences
Departmentof Preventative
HealthSciences
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13JacksonKaujeuaStreet T: +264612072970
Private Bag13388
F: +264612079970
Windhoek
E: dphs@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION: BACHELOR OF ENVIRONMENTAL HEALTH SCIENCES
QUALIFICATION CODE: 08 BOHS
LEVEL: 6
COURSE: OCCUPATIONAL HEALTH AND SAFETY 2B
COURSECODE: OHS612S
DATE: JANUARY 2025
SESSION: 2
DURATION: 3 HOURS
MARKS: 100
SECOND OPPORTUNITY/ SUPPLEMENTARY: EXAMINATION QUESTION PAPER
EXAMINER:
MODERATOR:
MRS. MOUYELELE HAUFIKU
MR. JOSHUA HIDINWA
INSTRUCTIONS
1. Answer all questions on the separate answer sheet.
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: NONE
This exam paper consists of 4 pages, including the front page
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SECTION A: SHORT ANSWER QUESTIONS
[40 MARKS]
QUESTION 1
[10 MARKS]
1.0 Define the following terms/concepts in the context of Occupational Health and Safety.
1.1 Chemical Time Weighted Average
[1]
1.2 Engineering Control
[1]
1.3 Risk assessment
[1]
1.4 Lethal DoseS0 (LOSO)
[1]
1.5 Material Safety Data Sheets (MSDS)
[1]
1.6 Hazard elimination
[1]
1.7 Tolerable risk Level
[1]
1.8 LocaI effect
[1]
1.9 Virulence
[1]
1.10 Unsafe practices
[1]
QUESTION 2
[10 MARKS]
2.0 Match the concepts in Column A to their most definition in Column B. Write on your
answer sheet the concept number and the letter representing the correct definition.
1 mark each
No COLUMNA
COLUMNB
2.1 Probability
A Particles in the lungs cause destruction and inflammation of the
bronchi.
2.2 Direct transmission B Where the susceptible person is infected by contact with a
contaminated surface, food-borne, droplet/airborne transmission or
by vectors.
2.3 Chronic bronchitis C as an unplanned and uncontrolled event caused by an unsafe act or
unsafe condition which may or may not result in injury or damage to
property and even death
2.4 Teratogens
D Is the likelihood of occurrence of a particular event.
2.5 Indirect
transmission
2.6 Mutagen
2.7 Accident
2.8 Ceiling
concentration
2.9 Severity
2.10 Emphysema
E Causes changes in the genetic material of the body by altering the
genes and therefore the chromosomes of the body.
F A threshold of a substance which may never be exceeded under any
circumstances.
G Rapture of the inter alveolar cell membranes
H Requires physical contact between an infected person and a
susceptible person
I Causes abnormalities in the unborn baby
J Is the magnitude of the consequences that may arise for the
occurrence of the event.
Occupational Health and Safety (OHS612S)
2nd Opportunity January 2025
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QUESTION 3
[20 MARKS]
3.1 Choose the correct answer from the alternatives given; write the question number and
the correct letter representing your answer.
[SJ
3.1.1 A minute organism, such as microbes, bacteria, cocci, viruses, molds is called:
(lJ
a) Biohazard
b) Organism
c) Microorganism
d) Biological hazards
3.1.2 Disease of vertebrate animals transmissible to human and other animals is called:
[lJ
a) Zoonosis
b) Anthropozooonois
c) Zooanthroponosis
d) Zoonosaisias
3.1.3 Disease of vertebrate animals chiefly transmissible to humans:
(lJ
a) Zoonosis
b) Anthropozooonois
c) Zooanth roponosis
d) Zoonosaisias
3.1.4 The following is not a risk factor for ergonomic injuries:
[lJ
a) How often task is performed
b) Walking at a wet floor
c) Level of required effort and duration of task
d) The physical environment (temperature, noise, lighting)
3.1.5 The simple dimensions of the stationary human being e.g. eye level, height, shoulder
height/ width, forward reach is referred to:
(lJ
a) Static Anthropometry
b) Dynamic Anthropometry
c) Biomechanics anthropometry
d) General anthropometry
3.2 List any five (S) Respiratory effects of Cadmium in the body.
[SJ
3.3 Explain why risk assessment is important.
[SJ
3.4 State any five (S) Basic Anthropometric Measurements.
[SJ
Occupational Health and Safety (OHS612S)
2nd Opportunity January2025
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SECTION B: LONG ANSWER QUESTIONS
Please answer ALL of the questions in this section.
[60 MARKS)j
QUESTION 4
4.1 Define ventilation.
4.2 Justify the causes of discomfort in unventilated or poorly ventilated rooms.
4.3 Explain any five (5) reasons why ergonomics is crucial in workplaces.
[20 MARKS]
[2]
[8]
[10]
QUESTION 5
[20 MARKS]
5.1 Discuss why accidents are still happening in the workplace despite measures and
strategies designed to prevent, control, reduce, or eliminate occupational hazards and
risks have been developed and applied continuously.
[20]
QUESTION 6
6.1 Summarize the effects of psychological hazards in the workplace.
END OF QUESTION PAPER
[20 MARKS]
[20]
Occupational Health and Safety {OHS612S)
2nd Opportunity January 2025
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