WEEK 3 PART 2

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Questions and Answers

What is the probability of an incident occurring with unsecured loads at the company?

  • Certain (correct)
  • Possible
  • Remote
  • Unlikely

What consequence resulted from one of the incidents involving an unsecured load?

  • A worker died (correct)
  • A worker suffered a broken leg
  • No injuries were reported
  • A worker suffered a minor injury

Using the risk matrix, what intersection represents the risk of unsecured loads at the company?

  • Minimal
  • Moderate
  • Extreme (correct)
  • High

What could have changed the probability of another incident occurring if the risk assessment had been conducted after the first near-miss?

<p>From certain to possible (C)</p> Signup and view all the answers

What is the primary purpose of conducting a risk assessment after an incident?

<p>To minimize loss and create a safer environment (D)</p> Signup and view all the answers

What was the consequence rating for incidents where no one was hurt?

<p>Minor (D)</p> Signup and view all the answers

What likely consequence remains even if the probability of an incident is reduced to possible?

<p>Catastrophic injury (C)</p> Signup and view all the answers

What would be an appropriate action for the company based on the risk assessment of unsecured loads?

<p>Implement safety measures immediately (C)</p> Signup and view all the answers

What is the main goal of inherently safer design?

<p>To reduce the risk of incidents and their consequences (C)</p> Signup and view all the answers

Which of the following best describes the principle of minimization?

<p>Reducing the amount of a hazard present (B)</p> Signup and view all the answers

What is a key advantage of quantitative risk assessment compared to qualitative risk assessment?

<p>More certainty (A)</p> Signup and view all the answers

Which principle involves replacing a more dangerous hazard with a less dangerous one?

<p>Substitution (A)</p> Signup and view all the answers

Which scenario is most suitable for a quantitative risk assessment?

<p>A high-risk scenario with disagreement among a team (C)</p> Signup and view all the answers

In a risk matrix, what does the term 'catastrophic' refer to?

<p>The highest degree of consequence (D)</p> Signup and view all the answers

How does moderation contribute to inherently safer design?

<p>By using a less hazardous form or concentration of a hazard (B)</p> Signup and view all the answers

What does simplification aim to achieve?

<p>A direct approach to handling hazards to minimize errors (D)</p> Signup and view all the answers

What does the probability category 'rare' indicate in the risk matrix?

<p>The event is highly unlikely to occur (B)</p> Signup and view all the answers

Which of the following statements is true regarding engineering controls?

<p>They are systems added to mitigate risks after hazards exist (C)</p> Signup and view all the answers

How is the risk level determined in a risk matrix?

<p>By multiplying probability of occurrence by the severity of consequences (D)</p> Signup and view all the answers

Which of the following is a disadvantage of quantitative risk assessment?

<p>May be too complex for simple scenarios (B)</p> Signup and view all the answers

What is the consequence of not securing loads when transporting goods?

<p>Severe injury or death (D)</p> Signup and view all the answers

What is the role of buffering material in moderation?

<p>To prevent a load from shifting and falling (D)</p> Signup and view all the answers

What type of risk assessment is likely to provide a fast approximation of risks?

<p>Qualitative risk assessment (C)</p> Signup and view all the answers

Which principle would suggest using a restraining system that can be operated by one person?

<p>Simplification (C)</p> Signup and view all the answers

Which equation is used to determine the degree of risk associated with an unwanted event?

<p>Probability of Occurrence x Consequence of the Outcome (D)</p> Signup and view all the answers

Which of the following best describes the consequence category labeled 'minor' in a risk matrix?

<p>Little to no impact on operations (C)</p> Signup and view all the answers

What does qualitative risk assessment rely on for analysis?

<p>Relative terms and categorical levels (C)</p> Signup and view all the answers

Which describes a quantitative risk assessment?

<p>It uses numerical values to describe risk levels. (C)</p> Signup and view all the answers

What is the purpose of conducting a risk assessment?

<p>To determine potential hazards and evaluate associated risks (B)</p> Signup and view all the answers

What could indicate a high degree of risk using the risk equation?

<p>High probability and high consequence (D)</p> Signup and view all the answers

Why is it important to choose the right risk assessment methodology?

<p>Because the wrong method can overlook significant risks (D)</p> Signup and view all the answers

What is one key advantage of qualitative risk analysis?

<p>It simplifies communication of risk levels to stakeholders. (B)</p> Signup and view all the answers

What is the main function of engineering controls in hazard management?

<p>To prevent the loss of containment of a hazard (A)</p> Signup and view all the answers

Which of the following is an example of an administrative control?

<p>Labelling hazardous goods with WHMIS (C)</p> Signup and view all the answers

What is a limitation of personal protective equipment (PPE)?

<p>PPE may provide protection only until its malfunction (A)</p> Signup and view all the answers

Which of the following best represents the hierarchy of controls?

<p>PPE is the last resort in hazard management (C)</p> Signup and view all the answers

Why might administrative controls fail to provide intended protection?

<p>Workers may ignore the prescribed procedures (B)</p> Signup and view all the answers

What is one characteristic of engineering controls?

<p>They can function without interfering with normal processes (D)</p> Signup and view all the answers

Which piece of equipment is NOT an example of personal protective equipment?

<p>Temperature sensor (C)</p> Signup and view all the answers

What role do engineers play in the hierarchy of controls?

<p>Engineers can contribute to all levels of the hierarchy (B)</p> Signup and view all the answers

Which of the following is an example of personal protective equipment (PPE)?

<p>Insulated gloves (D)</p> Signup and view all the answers

What is the purpose of wearing a dust mask in a laboratory setting?

<p>To reduce the inhalation of fine particles (A)</p> Signup and view all the answers

Which type of control is being utilized when a supervisor provides training on PPE usage?

<p>Administrative control (A)</p> Signup and view all the answers

In the context of risk assessment, what does the combination of probability and consequence define?

<p>Risk (A)</p> Signup and view all the answers

What inherently safer design principle is applied by ensuring the student is not pressured for time during the task?

<p>Minimization (C)</p> Signup and view all the answers

Which of the following controls focuses on removing hazards at the source?

<p>Providing ventilation in the lab (C)</p> Signup and view all the answers

Which of the following items would be considered NOT an example of personal protective equipment?

<p>Hazardous materials (C)</p> Signup and view all the answers

What type of control is indicated by the laboratory having a policy on PPE usage?

<p>Administrative control (C)</p> Signup and view all the answers

Flashcards

Quantitative Analysis

A method of risk assessment that produces numerical estimates and error ranges, providing a precise understanding of risk levels.

Qualitative Analysis

A risk assessment approach using subjective judgments and expert opinions to assess risk levels.

Risk Matrix

A tool used to evaluate and categorize risk based on the probability of occurrence and the severity of the consequence.

Probability of Occurrence

How likely an event is to happen, ranging from 'rare' to 'certain'.

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Consequence of Outcome

The severity of the impact if an event occurs, ranging from 'insignificant' to 'catastrophic'.

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Risk Categories

Levels of risk determined by combining probability and consequence, categorized as low, medium, high, or extreme.

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Quantitative Advantages

Provides detailed and precise risk estimates with a higher level of certainty.

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Qualitative Advantages

Offers a quick and cost-effective way to assess risks, suitable for a wider range of scenarios.

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Risk Equation

A mathematical formula that calculates risk by multiplying the probability of an event occurring with the severity of its consequences.

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Consequence

The severity of the outcome if an unwanted event occurs. It describes how bad the result could be.

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Risk Assessment

A systematic process for identifying, analyzing, and evaluating potential risks in a situation.

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Qualitative Risk Assessment

Classifying risks based on their relative severity using terms like 'low,' 'medium,' or 'high.'

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Quantitative Risk Assessment

Using numerical values to quantify and compare the level of risk associated with different hazards.

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Hazard Scenario

A specific situation that could potentially lead to an unwanted event or hazard.

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Risk Assessment Methodology

A structured approach used to analyze and assess risks in a systematic and organized way.

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How to Choose the Right Risk Assessment Method

Select the method that aligns best with the specific circumstances of the situation being assessed.

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Probability (of an event)

The likelihood of an event happening, often expressed as a percentage or fraction.

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Consequence (of an event)

The impact or outcome of an event, measured by its severity.

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Extreme Risk

The highest level of risk, indicating a high probability of a severe consequence.

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Preventative Risk Assessment

A risk assessment conducted after an incident to prevent similar events from happening again.

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Corrective Action

Steps taken to address a risk identified during a risk assessment.

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Near-Miss Incident

An event that almost resulted in an accident or injury but did not.

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Inherently Safer Design

Designing a process to permanently eliminate or reduce hazards, minimizing the consequences of incidents.

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Minimization

Reducing the amount of a hazard present. Like using smaller containers to reduce the impact energy of a falling load.

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Substitution

Replacing a hazardous element with a less hazardous one. For example, using a lighter load instead of a heavy one.

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Moderation

Using a less hazardous form of a hazard. This could involve diluting chemicals or lowering process temperatures.

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Simplification

Simplifying operations to minimize errors. For instance, using a single-step restraint system instead of a multi-step one.

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Engineering Controls

Systems added to a process to prevent or mitigate loss of containment, which occurs when hazardous energy is released unintentionally.

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Loss of Containment

The unplanned release of hazardous energy, such as a chemical spill or explosion.

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Inherently Safer Design vs. Engineering Controls

Inherently safer design focuses on preventing hazards from the start, while engineering controls are added on to mitigate risks. Inherently safer design is generally more effective.

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Administrative Controls

Controls that rely on instructions, training, and procedures to reduce risk, such as safety guidelines or work permits.

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Personal Protective Equipment (PPE)

Equipment worn by individuals to protect themselves from hazards, such as safety boots or respirators.

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Hierarchy of Controls

A system that ranks controls from most to least effective, with engineering controls being the most effective and PPE being the least effective.

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Limitations of PPE

PPE can be ineffective due to physical proximity to the worker, potential malfunctions, and worker error.

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Engineering in all Levels

Engineering principles can contribute to all levels of the hierarchy of controls, not just engineering controls.

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Why is PPE the Last Resort?

PPE is the least effective control because it relies on the worker to wear it properly and it may fail without warning.

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Examples of Engineering Controls

Examples of engineering controls include load securing straps, temperature sensors triggering cooling, and automated safeguarding systems.

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Hazard

A source or situation that has the potential to cause harm or damage.

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Risk

The chance of something bad happening, measured by the likelihood (probability) and severity (consequence) of an event.

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Energy Source

Any source of energy that has the potential to cause harm, such as electrical, mechanical, thermal, or chemical energy.

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Probability

The likelihood of an event occurring, expressed as a percentage or a fraction.

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Elimination

The most effective control measure, completely removing the hazard from the work environment.

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Study Notes

Hazard Definitions

  • A hazard is a source of potential harm.
  • A hazard exists when a source of energy could be released.
  • There is a corresponding energy source for each hazard.
  • A loss of containment event occurs when the energy from a hazard is released inappropriately.

Sources of Energy

  • Gravity: Working at heights, unsecured objects
  • Electricity: Live exposed electrical wires
  • Mechanical: Moving equipment/parts
  • Chemical: Toxic gases/chemicals
  • Pressure: Air or compressed gas
  • Noise: Sustained or repeated exposure to loud noise
  • Thermal: Sustained or repeated exposure to heat or cold
  • Radiant: Intense light, ionizing radiation, thermal radiation

Risk

  • Risk = Probability x Consequence
  • Probability is the likelihood of a hazard occurring.
  • Consequence is the potential magnitude of the impact of the hazard.
  • Risk is measured qualitatively (moderate, high, extreme) or quantitatively (frequency of incidents or estimated cost).

Risk Matrix

  • A risk matrix visually displays probability and consequence to determine risk.
  • Probability is listed on one axis (rare, unlikely, possible, likely, certain)
  • Consequence is listed on the other axis (insignificant to catastrophic)
  • The cells of the matrix are color-coded to show a clear visual representation of risks in terms of probability and severity (from low to high).

Hierarchy of Controls

  • Elimination
  • Inherent Safety
  • Engineering Controls
  • Administrative Controls
  • Personal Protective Equipment (PPE)

The Hierarchy of Controls is a framework for prioritizing control measures in order of effectiveness. It aims to minimize workplace risks by eliminating hazards, if possible, and using other control measures when elimination is not feasible. The hierarchy, from most effective to least effective, is:

  • Elimination: This is the most effective control. It involves removing the hazard altogether. Example: If a piece of equipment poses a risk, removing the equipment from the workplace eliminates the hazard.
  • Inherent Safety: This seeks to design the process to make it inherently safer, reducing the risk of a hazardous outcome. 7Example: Using safer materials or processes that reduce the likelihood of a hazard occurring.
  • Engineering Controls: These are physical modifications to the workplace or equipment to control the risk at the source. Example: Using guards, warning devices, or ventilation systems to isolate or mitigate a hazard.
  • Administrative Controls: These are changes in work practices, procedures, or policies to reduce risk. Example: Implementing training programs, implementing safety procedures, or establishing safety rules.
  • Personal Protective Equipment (PPE): This is the least effective control measure and is used as a last resort when other controls are not feasible or effective. Example: Safety glasses, respirators, gloves, and other protective gear.
    • You should be aware that PPE can fail to function correctly, and it shouldn't be solely relied upon.

    • Always prioritize using higher-level controls in the hierarchy whenever possible.

      Inherent safety is about designing processes or systems to make them inherently safer, reducing hazards or risks from the start. 71 The four main principles of inherent safety are:

      • Minimization: This principle involves reducing the amount of the hazard present. For example, using smaller containers to minimize the amount of hazardous material in use.
      • Substitution: This principle involves replacing hazardous components with less hazardous ones. 72 For example, using a less toxic solvent in a process.
      • Moderation: This principle involves using a less hazardous form of the hazard. 73 For example, reducing the temperature or pressure of a process to lower the risk.
      • Simplification: This principle involves simplifying the process or system to reduce the likelihood of errors or accidents. 74 For example, using a single control mechanism instead of multiple complex ones.

      Inherent safety is about making things safer by design. The four main principles are:

      • Minimization: Use less of the dangerous stuff.
      • Substitution: Swap out the hazard for something less risky..
      • Moderation: Use a less dangerous form of the hazard.
      • Simplification: Make the process easier to avoid errors.

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