Electrical Hazards and Safety Controls
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Questions and Answers

What was a major contributing factor to the incident involving the worker and the overhead powerline?

  • The boom truck operator's view might have been obstructed. (correct)
  • A signaler was used effectively during the procedure.
  • The company had designated a safe unloading area.
  • The worker was wearing appropriate personal protective equipment.

    • Which electrical hazard type involves the danger of electricity entering the human body?

  • Electrical fires.
  • Arcing incidents.
  • Overloading circuits.
  • Electrical shock. (correct)

    • What should a company ensure to prevent incidents like the one involving the apprentice and the electrical panel?

  • Regularly update equipment to the latest technology.
  • Provide appropriate safety training and supervision. (correct)
  • Limit access to the electrical panels only to apprentices.
  • Ensure all panels are kept permanently de-energized.

    • What was a neglectful practice that led to the apprentice's fatal injury?

    <p>The electrical panel had been left energized.</p> Signup and view all the answers

    Which of the following mechanisms describes how electrical shock can occur?

    <p>A person touches a grounded object while standing on a wet surface.</p> Signup and view all the answers

    Which human factor was identified as a contributor to the worker’s shock incident?

    <p>Lack of a signaler to guide the unloading process.</p> Signup and view all the answers

    What can be a consequence of even mild electrical shock?

    <p>Temporary loss of muscle strength and cognitive function.</p> Signup and view all the answers

    What is one of the main types of electrical hazards that can cause serious property damage?

    <p>Electrical fires.</p> Signup and view all the answers

    What is a significant consequence associated with electrical accidents?

    <p>High costs in property damage</p> Signup and view all the answers

    Which of the following is NOT a type of electrical hazard?

    <p>Chemical burns</p> Signup and view all the answers

    What is the primary cause of electrical incidents?

    <p>Human error or activity</p> Signup and view all the answers

    How does the injury-to-fatality ratio of electrical incidents compare to other occupational injuries?

    <p>It is lower than 755 to 1</p> Signup and view all the answers

    Which statistic indicates the severity of injuries from electrical incidents?

    <p>1 fatality for every 15 non-critical injuries</p> Signup and view all the answers

    What type of loss is particularly high as a result of electrical incidents in Canada and the United States?

    <p>Financial property loss</p> Signup and view all the answers

    Which statement best describes the relationship between electricity and safety in engineering?

    <p>Understanding electrical hazards is essential for ensuring user safety.</p> Signup and view all the answers

    What does the term 'hierarchy of controls' refer to in relation to electrical hazards?

    <p>Different levels of safety measures to mitigate hazards</p> Signup and view all the answers

    What is defined as the flow of current through an insulating medium that is accompanied by light, heat, and sound?

    <p>Arcing</p> Signup and view all the answers

    Which of the following factors does NOT contribute to the intensity of an arcing incident?

    <p>Environmental temperature</p> Signup and view all the answers

    What can happen to a person standing several feet away from an arc flash?

    <p>They can suffer severe burns</p> Signup and view all the answers

    At what temperature can an electric arc potentially reach?

    <p>20,000°C</p> Signup and view all the answers

    What is the main cause of electrical fires?

    <p>Improper use or poor maintenance of electrical equipment</p> Signup and view all the answers

    Why do electrical fires occur more frequently in homes than in commercial or industrial facilities?

    <p>Because of outdated wiring practices</p> Signup and view all the answers

    What severe consequence can occur from inhaling vapour produced by an arc blast?

    <p>Respiratory burns</p> Signup and view all the answers

    What is a common cause of arcing that can lead to electrical fires?

    <p>Improper or damaged electrical terminations</p> Signup and view all the answers

    What is over-fusing in electrical systems?

    <p>Using a fuse with higher ampacity than needed</p> Signup and view all the answers

    Which method is considered the most effective in controlling electrical hazards?

    <p>Elimination</p> Signup and view all the answers

    Which principle of inherent safety involves using a less hazardous form of a material?

    <p>Substitution</p> Signup and view all the answers

    What is an example of an engineering control for managing electrical hazards?

    <p>Using the correct fuse for a circuit</p> Signup and view all the answers

    What type of control would prohibit the use of extension cords in an organization?

    <p>Administrative controls</p> Signup and view all the answers

    Which of the following is NOT an example of personal protective equipment?

    <p>Safety signage</p> Signup and view all the answers

    Which hierarchy of controls focuses on modifying processes to eliminate high voltage requirements?

    <p>Elimination</p> Signup and view all the answers

    What does moderation as an inherently safer design principle involve?

    <p>Employing a less hazardous form of the existing hazard</p> Signup and view all the answers

    Study Notes

    Electrical Hazards and Controls

    • This module is about the dangers of electricity and control measures
    • The learning objectives are to identify dangers associated with electricity, describe the main types of electrical hazards, and explain the hierarchy of controls for electrical hazards
    • Electricity is essential to modern life but also dangerous
    • Electrical accidents cause significant property damage, injuries, and loss of life.
    • Electrical hazards include electrical shock, arcing, and electrical fires
    • Electrical incidents often stem from human error or inadequate safety practices.
    • Electrical accidents are costly, with annual figures in Canada and the US indicating substantial property damage, injuries, and deaths.
    • Electrical shock occurs when electricity enters the human body, completing a circuit. Currents under one amp can be fatal.
    • Arcing is a flow of current through an insulating medium (air) accompanied by light, heat, and sound.
    • Electrical fires are a common cause of fatalities related to electrical incidents. They result from misuse and poor maintenance of electrical equipment, rather than faulty design.
    • Electrical fires often result from arcing and overheating.
    • Causes of electrical fires include faulty outlets, old wiring, overloaded circuits, and short circuits.
    • The hierarchy of controls is a method for managing risks, with five steps: elimination, inherent safety, engineering controls, administrative controls, and personal protective equipment.
    • Elimination is the most effective control, removing the hazard altogether.
    • Inherent safety involves designing equipment to minimize or exclude hazards.
    • Engineering controls use physical barriers or tools to reduce exposure to hazards (e.g., safety equipment for jobs that are dangerous)
    • Administrative controls affect how the work is done to prevent accidents (e.g., training, procedures, rules).
    • Personal protective equipment (PPE) is the least effective control, providing safety gear for workers (e.g., insulated gloves).
    • Electrical hazards can be controlled through proper awareness, appropriate preventative measures, and safe work practices.

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    Week 4 Electrical Hazards and Controls PDF

    Description

    This quiz explores the dangers associated with electricity and the control measures that can prevent electrical accidents. Participants will learn to identify different types of electrical hazards such as shock, arcing, and fires, as well as the importance of safety practices to mitigate risks. Understanding these concepts is essential for maintaining safety in environments where electricity is used.

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