bizSAFE Certification Singapore Risk Assessment Methodology Questions and Answers — Questions and Answers
Question 1: A risk assessment team in a Singaporean manufacturing company identifies a hazardous situation. When evaluating the risk using the 5x5 matrix recommended in the Code of Practice on WSH Risk Management, what two factors must the team primarily consider to determine the risk level?
- The cost of implementation and the time required for mitigation.
- The number of employees exposed and the frequency of the task.
- The severity of potential harm and the likelihood of the incident occurring. (Correct answer)
- The relevant WSH regulations and the availability of personal protective equipment (PPE).
Correct answer: The severity of potential harm and the likelihood of the incident occurring.
The core principle of risk evaluation in Singapore, as guided by the WSH (Risk Management) Regulations and the Code of Practice, is to determine the level of risk by assessing the severity of the potential harm (how bad the outcome could be) and the likelihood of that harm occurring. The 5x5 risk matrix is a tool that plots these two factors to arrive at a risk priority number or level (e.g., Low, Medium, High).
Question 2: A construction site supervisor in Singapore is creating a Safe Work Procedure (SWP) for operating a new excavator. According to the WSH (Risk Management) Regulations and best practices, which of the following is NOT a mandatory component of the SWP?
- Step-by-step instructions for performing the task safely.
- The name and NRIC number of every worker certified to operate the machine. (Correct answer)
- Personal Protective Equipment (PPE) required for the task.
- Hazards associated with each step of the operation.
Correct answer: The name and NRIC number of every worker certified to operate the machine.
A Safe Work Procedure (SWP) is a document that provides detailed instructions on how to perform a task safely. It must identify hazards, specify required PPE, and provide clear, step-by-step instructions. While a company must maintain records of certified operators, listing the specific NRIC numbers of every worker on the SWP document itself is not a standard or required component; the focus is on the procedure, not a live roster of personnel.
Question 3: During a risk assessment for a painting job at a shipyard in Tuas, the team identifies the use of a solvent-based paint with high Volatile Organic Compounds (VOCs) as a significant health hazard. Following the hierarchy of controls endorsed by the WSH Council, which of the following is the most effective and preferred risk control measure?
- Ensuring all workers wear respirators and gloves.
- Installing a temporary ventilation system to extract fumes.
- Replacing the solvent-based paint with a water-based, low-VOC alternative. (Correct answer)
- Conducting daily toolbox meetings to remind workers of the dangers.
Correct answer: Replacing the solvent-based paint with a water-based, low-VOC alternative.
The hierarchy of controls ranks risk mitigation strategies from most to least effective. Substitution, which involves replacing a hazardous substance or process with a less hazardous one, is the second most effective measure after elimination. Replacing the hazardous solvent-based paint with a safer water-based alternative directly addresses the hazard at its source. Engineering controls (ventilation), administrative controls (toolbox meetings), and PPE (respirators) are all lower on the hierarchy and should be considered only after substitution has been deemed not reasonably practicable.
Question 4: Under the WSH Act, an employer must take all measures that are 'reasonably practicable' to ensure workplace safety. Which of the following best defines the principle of 'reasonably practicable' in the context of Singapore's regulations?
- Implementing any safety measure regardless of its cost or difficulty.
- Taking action only when an accident has occurred to prevent recurrence.
- Balancing the degree of risk against the time, cost, and physical difficulty of implementing control measures. (Correct answer)
- Fulfilling only the minimum safety requirements listed in the company's insurance policy.
Correct answer: Balancing the degree of risk against the time, cost, and physical difficulty of implementing control measures.
The term 'reasonably practicable' under the Singapore WSH Act involves a cost-benefit analysis. It requires duty holders to weigh the level of risk (severity and likelihood of harm) against the resources (time, money, trouble) needed to control it. A measure must be taken unless the cost of doing so is grossly disproportionate to the risk reduction it would achieve. It is a key legal concept that goes beyond minimum compliance or reactive measures.
Question 5: A logistics company in Singapore has completed its risk assessments for all warehouse activities. According to the WSH (Risk Management) Regulations, what is the minimum period these risk assessment records must be kept and made available for inspection by the Ministry of Manpower (MOM)?
- 1 year
- 10 years
- 5 years
- 3 years (Correct answer)
Correct answer: 3 years
Regulation 5 of the Workplace Safety and Health (Risk Management) Regulations explicitly states that a record of any risk assessment conducted must be kept by the employer, self-employed person, or principal for a period of at least 3 years. This record must be made available upon request to relevant authorities.
Question 6: A Risk Management (RM) Champion in a bizSAFE Level 2 certified company is facilitating a hazard identification exercise. Which of the following is considered a 'hazard' rather than a 'risk'?
- A high probability of a worker falling from an unsecured ladder.
- An unguarded opening on the second floor of a worksite. (Correct answer)
- A medium risk of electrocution from faulty wiring.
- A low chance of a chemical splash causing minor skin irritation.
Correct answer: An unguarded opening on the second floor of a worksite.
In risk assessment terminology used in Singapore, a 'hazard' is the potential source of harm (the 'what'). A 'risk' is the likelihood that the hazard will actually cause harm, combined with the severity of that harm. An unguarded opening is the hazard itself. The other options describe the risk, as they incorporate the concepts of probability/likelihood ('high probability', 'medium risk', 'low chance') and the potential outcome.
