• MNO2608 January/February Supplementary Exam
Memo | Due January/February 2026 |
Fundamentals of Industrial Hygiene (UNISA)
,Question 1: What is the primary goal of industrial hygiene?
A) To increase productivity
B) To protect worker health and safety (Correct Answer)
C) To enhance company profits
D) To promote products
Rationale: The primary goal of industrial hygiene is to protect worker health and safety by identifying, evaluating, and
controlling environmental factors that may adversely affect health.
Question 2: Which of the following is an example of a physical hazard?
A) Chemical exposure
B) Noise (Correct Answer)
C) Biological agents
D) Ergonomic issues
Rationale: Noise is classified as a physical hazard related to occupational safety, while chemical exposure, biological
agents, and ergonomic issues fall under different categories.
Question 3: What does the acronym PEL stand for?
A) Positive Exposure Limit
B) Permissible Exposure Limit (Correct Answer)
C) Personal Exposure Limit
D) Public Exposure Limit
Rationale: PEL stands for Permissible Exposure Limit, which is the maximum amount of a substance that a worker can
be exposed to under OSHA regulations.
Question 4: Which of the following is the best method for controlling exposure to hazardous substances?
A) Personal protective equipment
B) Administrative controls
C) Engineering controls (Correct Answer)
D) Work practice controls
Rationale: Engineering controls are considered the most effective method for reducing exposure by removing the
hazard or isolating workers from the hazard.
Question 5: Which of the following is NOT a common method of assessing exposure to airborne contaminants?
A) Direct reading instruments
B) Personal monitoring (Correct Answer)
, C) Area sampling
D) Surveillance of worker health
Rationale: Personal monitoring refers to assessing exposure to specific contaminants for an individual worker rather
than a method used to assess airborne contaminants generally.
Question 6: Which type of noise is considered the most hazardous to hearing?
A) Impulse noise
B) Continuous noise
C) Impact noise (Correct Answer)
D) Low-frequency noise
Rationale: Impact noise is sudden and can cause immediate damage to hearing.
Question 7: In the hierarchy of controls, which of the following is the least effective?
A) Elimination
B) Substitution
C) Engineering controls
D) Personal protective equipment (Correct Answer)
Rationale: Personal protective equipment (PPE) is the last line of defense and is considered less effective than
eliminating or controlling the hazard at the source.
Question 8: What is the purpose of Material Safety Data Sheets (MSDS)?
A) To dispense chemicals
B) To provide information on hazards and safe handling (Correct Answer)
C) To replace PPE
D) To document workplace accidents
Rationale: MSDS provide essential information about hazards and safe handling procedures for chemicals.
Question 9: Which of the following is a common symptom of exposure to carbon monoxide?
A) Nausea
B) Headache (Correct Answer)
C) Skin irritation
D) Eye watering
Rationale: A headache is a classic symptom of carbon monoxide poisoning due to its binding with hemoglobin.
Question 10: What type of ventilation system is best for handling hazardous fumes?
Memo | Due January/February 2026 |
Fundamentals of Industrial Hygiene (UNISA)
,Question 1: What is the primary goal of industrial hygiene?
A) To increase productivity
B) To protect worker health and safety (Correct Answer)
C) To enhance company profits
D) To promote products
Rationale: The primary goal of industrial hygiene is to protect worker health and safety by identifying, evaluating, and
controlling environmental factors that may adversely affect health.
Question 2: Which of the following is an example of a physical hazard?
A) Chemical exposure
B) Noise (Correct Answer)
C) Biological agents
D) Ergonomic issues
Rationale: Noise is classified as a physical hazard related to occupational safety, while chemical exposure, biological
agents, and ergonomic issues fall under different categories.
Question 3: What does the acronym PEL stand for?
A) Positive Exposure Limit
B) Permissible Exposure Limit (Correct Answer)
C) Personal Exposure Limit
D) Public Exposure Limit
Rationale: PEL stands for Permissible Exposure Limit, which is the maximum amount of a substance that a worker can
be exposed to under OSHA regulations.
Question 4: Which of the following is the best method for controlling exposure to hazardous substances?
A) Personal protective equipment
B) Administrative controls
C) Engineering controls (Correct Answer)
D) Work practice controls
Rationale: Engineering controls are considered the most effective method for reducing exposure by removing the
hazard or isolating workers from the hazard.
Question 5: Which of the following is NOT a common method of assessing exposure to airborne contaminants?
A) Direct reading instruments
B) Personal monitoring (Correct Answer)
, C) Area sampling
D) Surveillance of worker health
Rationale: Personal monitoring refers to assessing exposure to specific contaminants for an individual worker rather
than a method used to assess airborne contaminants generally.
Question 6: Which type of noise is considered the most hazardous to hearing?
A) Impulse noise
B) Continuous noise
C) Impact noise (Correct Answer)
D) Low-frequency noise
Rationale: Impact noise is sudden and can cause immediate damage to hearing.
Question 7: In the hierarchy of controls, which of the following is the least effective?
A) Elimination
B) Substitution
C) Engineering controls
D) Personal protective equipment (Correct Answer)
Rationale: Personal protective equipment (PPE) is the last line of defense and is considered less effective than
eliminating or controlling the hazard at the source.
Question 8: What is the purpose of Material Safety Data Sheets (MSDS)?
A) To dispense chemicals
B) To provide information on hazards and safe handling (Correct Answer)
C) To replace PPE
D) To document workplace accidents
Rationale: MSDS provide essential information about hazards and safe handling procedures for chemicals.
Question 9: Which of the following is a common symptom of exposure to carbon monoxide?
A) Nausea
B) Headache (Correct Answer)
C) Skin irritation
D) Eye watering
Rationale: A headache is a classic symptom of carbon monoxide poisoning due to its binding with hemoglobin.
Question 10: What type of ventilation system is best for handling hazardous fumes?
