Safety in Machinery and Robotics
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Questions and Answers

What does the variable S represent in the stopping distance formula S = V2/30 μ?

  • Stopping distance (correct)
  • Coefficient of friction
  • Time taken to stop
  • Initial velocity

    • What does a presence-sensing mat do?

  • Alerts operators about hazardous areas
  • Detects operator presence to start the machine
  • Detects a predetermined weight to stop machine operation (correct)
  • Automatically adjusts to the height of the operator

    • Which of the following is a common hazard associated with railroads?

  • Wind shear
  • Poor communication
  • Grade crossing accidents (correct)
  • Icing of wings

    • What is a limitation of enclosure guards in machinery?

    <p>They require removal for machine adjustment</p> Signup and view all the answers

    What is the primary function of two-hand control systems?

    <p>To prevent operators from entering the danger area</p> Signup and view all the answers

    What is one of the critical components of hazard control?

    <p>Effective communication</p> Signup and view all the answers

    Which type of gate provides a barrier during the entire machine cycle?

    <p>Type 'B' Gate</p> Signup and view all the answers

    What is a pinch point hazard?

    <p>When objects move together crushing what is between them</p> Signup and view all the answers

    What is a disadvantage of adjustable guards?

    <p>They require frequent maintenance or adjustment</p> Signup and view all the answers

    What is the role of pullback devices in machine safety?

    <p>To automatically withdraw the operator's hands from danger</p> Signup and view all the answers

    What additional precautions are needed when entering the robotics work envelope?

    <p>Following lockout and tagout procedures</p> Signup and view all the answers

    How does pendant control benefit robot operation?

    <p>It enables control at slow speeds with emergency stop capabilities</p> Signup and view all the answers

    What is the purpose of locking out main power sources on machines or systems?

    <p>To prevent unintended operation during maintenance</p> Signup and view all the answers

    What does a presence-sensing device do?

    <p>Stops operation when the sensing field is disturbed</p> Signup and view all the answers

    Which type of gate provides a barrier during the downstroke of a mechanical press?

    <p>Type 'B' Gate</p> Signup and view all the answers

    What is a feature of self-adjusting guards?

    <p>Move according to the size of the stock being processed</p> Signup and view all the answers

    What is the main function of restraint devices?

    <p>To connect the operator's wrists limiting reach</p> Signup and view all the answers

    What does the two-hand control safeguard require?

    <p>Simultaneous use of both hands to operate safely</p> Signup and view all the answers

    What is the main purpose of awareness barriers?

    <p>To alert people about hazards present</p> Signup and view all the answers

    Which of the following describes adjustable guards?

    <p>Adjust for various operations but can be ineffective</p> Signup and view all the answers

    How do pullback devices function?

    <p>Automatically release hands during operation</p> Signup and view all the answers

    What is one of the key components of hazard control?

    <p>Planning and designing</p> Signup and view all the answers

    Which of the following is an example of a design error that can introduce hazards?

    <p>Failure to convert square inches to square feet</p> Signup and view all the answers

    What can result from inadequate packaging in production and distribution?

    <p>Release of hazardous materials</p> Signup and view all the answers

    Which principle is crucial for minimizing hazards?

    <p>Recognizing and defining preventive actions</p> Signup and view all the answers

    What is the highest priority for reducing hazards?

    <p>Eliminating or replacing the hazard</p> Signup and view all the answers

    What can lead to failures and hazards in hazard control planning and design?

    <p>Ignoring the use environment and making inadequate assumptions</p> Signup and view all the answers

    How can hazard severity be reduced?

    <p>Implementing a sprinkler system</p> Signup and view all the answers

    What should be prioritized first when reducing hazards?

    <p>Eliminate or replace the hazard</p> Signup and view all the answers

    What does redundancy in a system help to achieve?

    <p>Lower the probability of error</p> Signup and view all the answers

    Which category is associated with locations where flammable gases are present?

    <p>Category I</p> Signup and view all the answers

    Which component is NOT part of the communication process that can introduce hazards?

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

    What is a recommended measure to minimize the likelihood of exposure to hazards?

    <p>Use smaller quantities of flammable or toxic materials</p> Signup and view all the answers

    What can defective or damaged cords lead to?

    <p>Shocks, burns, or fires</p> Signup and view all the answers

    Which of the following is an example of a hazardous location?

    <p>An area with easily ignitable fibers or flyings</p> Signup and view all the answers

    What is the primary objective of hazard control?

    <p>Eliminate or reduce risks from hazards</p> Signup and view all the answers

    How can redundancy in a system help in hazard control?

    <p>It reduces the probability of error or failure</p> Signup and view all the answers

    Which of the following actions is effective in preventing electrical hazards?

    <p>Inspecting cords and wires before use</p> Signup and view all the answers

    What is NOT a principle of hazard control?

    <p>Neglect historical data</p> Signup and view all the answers

    What factor is critical in ensuring effective hazard communication?

    <p>Clarity of the message</p> Signup and view all the answers

    Which of these is an inappropriate safety practice regarding electrical cords?

    <p>Using worn or damaged cords</p> Signup and view all the answers

    Study Notes

    Hazard Control

    • Hazard control involves reducing or eliminating risks from hazards.
    • Planning and design are crucial for hazard control, crucial for preventing failures and hazards
    • Failure to consider the environment, use of incorrect factors of safety, and inadequate assumptions, can all introduce hazards.

    Production and Distribution

    • Hazards can arise during production and distribution stages, like replacing chemicals or using inadequate packaging.
    • Poor maintenance and repair increase hazards in these processes

    Communication

    • Poor communication introduces hazards, especially when changes are not communicated effectively.
    • The four components that make up communication are: sender, message, channel, and receiver

    Principles of Hazard Control

    • To minimize hazards, recognize them, define preventive actions, assign responsibility, and measure effectiveness.
    • Historical data helps identify potential hazards

    Reduce the Hazard

    • Priorities for hazard reduction include eliminating, reducing hazard level, utilizing safety devices, warnings, and safety procedures.
    • Reducing severity leads to less injury.
    • Strategies for reducing severity include placing hazards in low-traffic areas, using smaller amounts of hazardous materials

    Redundancy-Backup System

    • Backup systems, or redundancy, in an operation or system lowers the probability of component failure.

    Hazardous Locations

    • Locations are classified into three categories:
      • Class I: Flammable/explosive mixtures
      • Class II: Combustible dust
      • Class III: Easily ignitable fibers/flyings.

    Defective or Damaged Cords

    • Improperly used cords cause shocks, burns, fires
    • Safety measures include insulating live wires, inspecting cords before use, and only using 3-wire cords for heavy use

    Accident Reconstruction

    • S = V2⁄30μ where S is stopping distance, V is initial velocity, and μ is coefficient of friction.

    Railroads

    • Explosions, fires, and releases of toxic materials are common hazards, usually from grade crossings.

    Aviation Hazards

    • Leaking fuel tanks and ignition, icing of wings, and detecting wind shear are significant concerns.

    Pinch Point Hazards

    • Hazards occur when two or more objects move towards one another crushing or shearing whatever is between them

    Enclosure Guards

    • Fixed guards prevent additional hazards, like pinch points, and allow viewing points of operation
    • Guards may be impractical for changing productions, repair or adjustment.

    Distance and Location

    • Minimum distance from floor/surface to mechanical power transmission apparatus varies, commonly 7 to 8 ft.

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    Related Documents

    Hazard Control PDF

    Description

    This quiz covers critical safety concepts related to machinery and robotics, including stopping distance formulas, hazard control systems, and the functionality of various safety devices. Test your knowledge on important safety protocols and systems designed to protect operators and machinery alike.

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