Industrial Workplace Safety and Ventilation
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Questions and Answers

What is the primary purpose of using Air Conditioners in ventilation?

  • To monitor gas levels in a confined space
  • To remove hazardous materials from the air
  • To reduce the temperature in a confined space
  • To establish a positive means of ventilating confined spaces (correct)

    • What must be prepared and approved prior to confined space entry?

  • Rescue plan
  • Job safety analysis
  • Ventilation plan (correct)
  • Hazard assessment

    • Why is it essential to have Air Movers ready for use?

  • To reduce the risk of gas buildup
  • In case of Air Conditioners shutdown or emergency (correct)
  • In case of a power outage
  • To supplement the ventilation system

    • What is a critical consideration when preparing a rescue plan?

    <p>All of the above</p> Signup and view all the answers

    When is a rescue plan mandatory?

    <p>For all confined space entry types</p> Signup and view all the answers

    What is a key factor in determining the ventilation requirements?

    <p>The type of material being ventilated</p> Signup and view all the answers

    What is the primary purpose of a ventilation plan?

    <p>To determine the ventilation rate required</p> Signup and view all the answers

    Why is it essential to have a positive means of ventilating confined spaces?

    <p>To establish a safe working environment</p> Signup and view all the answers

    What is the maximum allowable concentration of CO and NH3 in terms of PPM?

    <p>25</p> Signup and view all the answers

    What is the maximum wet bulb globe temperature or ambient temperature allowed for confined space entry?

    <p>35°C or 46°C</p> Signup and view all the answers

    What type of ventilation system is not allowed to ventilate confined spaces?

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

    What is the minimum classification for a confined space until it is tested and verified?

    <p>A category</p> Signup and view all the answers

    What is the requirement for fans and air movers used in ventilation of confined spaces?

    <p>They must be electrically bonded and grounded</p> Signup and view all the answers

    What type of blower is allowed to ventilate confined spaces?

    <p>Pneumatic driven blower</p> Signup and view all the answers

    What is the minimum requirement for gas testing in confined spaces?

    <p>Flammable gases and vapors (LEL) below 5%</p> Signup and view all the answers

    What is an alternative to ventilation in confined spaces?

    <p>Air conditioners</p> Signup and view all the answers

    What is the primary purpose of venting during depressurization or purging?

    <p>To release gases or vapors to the atmosphere</p> Signup and view all the answers

    What is the purpose of a lifeline or retrieval line in a confined space?

    <p>To maintain contact with a person in a dangerous situation</p> Signup and view all the answers

    What is the primary hazard associated with explosive substances?

    <p>Sudden release of pressure and heat</p> Signup and view all the answers

    What is the primary purpose of ventilation in a confined space?

    <p>To remove hazardous gases and vapors</p> Signup and view all the answers

    What is the purpose of a breathing apparatus in a confined space?

    <p>To provide a stable air supply</p> Signup and view all the answers

    What is the primary purpose of gas testing in a confined space?

    <p>To identify the presence of hazardous gases</p> Signup and view all the answers

    What is the primary hazard associated with extreme temperatures?

    <p>Risk of heat stroke</p> Signup and view all the answers

    What is the primary purpose of a rescue plan in a confined space?

    <p>To rescue persons in a confined space</p> Signup and view all the answers

    What is the minimum oxygen content required in a confined space?

    <p>19.5%</p> Signup and view all the answers

    Which of the following is a requirement for energy isolation in a confined space?

    <p>Positive Isolation by installing rated blind / disconnecting line</p> Signup and view all the answers

    What is the purpose of gas testing in a confined space?

    <p>To detect oxygen content</p> Signup and view all the answers

    What should be covered in the immediate area during confined space entry?

    <p>Sewer openings</p> Signup and view all the answers

    What is the maximum oxygen content allowed in a confined space?

    <p>22.0%</p> Signup and view all the answers

    Which of the following is a requirement for ventilation in a confined space?

    <p>Providing air ventilation</p> Signup and view all the answers

    What is the purpose of posting sign boards in a confined space?

    <p>To indicate the presence of oxygen deficient atmosphere</p> Signup and view all the answers

    What should be removed / isolated in a confined space?

    <p>Radiation sources</p> Signup and view all the answers

    What is the minimum concentration of vapor in air below which propagation of flame will not occur in the presence of an ignition source?

    <p>Lower Explosion Limit (LEL)</p> Signup and view all the answers

    What is the role of a Gas Tester?

    <p>A person who has undergone training on the use of gas detecting equipment and is authorized to conduct gas test</p> Signup and view all the answers

    What is the maximum concentration of a flammable/combustible gas, vapor, mist, or dust in air that will support combustion when an ignition source is present?

    <p>Upper Explosive Limit (UEL)</p> Signup and view all the answers

    What is the oxygen level in an Oxygen Enriched Atmosphere?

    <p>More than 22.5% by volume</p> Signup and view all the answers

    Who is responsible for countersigning permits with regards to hot taps and work on flare headers?

    <p>General Manager</p> Signup and view all the answers

    What is the threshold for an Oxygen Deficient Atmosphere?

    <p>Less than 19.5% by volume</p> Signup and view all the answers

    What is the purpose of a gas test?

    <p>To determine the LEL and UEL of a gas</p> Signup and view all the answers

    What is the effect of an Oxygen Enriched Atmosphere on combustible materials?

    <p>It causes combustible materials to burn violently when ignited</p> Signup and view all the answers

    Study Notes

    Confined Space Requirements

    • Flammable gases and vapors (LEL) below 5%
    • Potential toxic air contaminants: CO and NH3 maximum allowable concentration is 25 PPM
    • Wet bulb globe temperature ≤ 35°C or Ambient Temp ≤ 46 °C as maximum

    Ventilation Requirements for Confined Space

    • Ventilation plan shall be prepared and approved as per IMRS 13-02-01-23
    • Positioning of mechanical aspirators, drawing of fresh air, routing of exhaust air
    • Air conditioners can be installed as an alternate of ventilation wherever it is convenient
    • A positive means of ventilating confined space shall be established and kept operated the entire time while work is in progress

    Rescue Plan Preparation and Requirements for Confined Space Entry

    • Rescue plan is mandatory for all Confined Space entry types
    • Rescue Plan shall consider the hazards outcome of the JSA, location of the work, number of workers, duration and period of work, and resources needed for the rescue

    Definitions

    • Wet-bulb globe temperature (WBGT): estimates the effect of temperature, humidity, wind speed, and radiation on humans
    • Explosive substance: a chemical substance that causes a sudden release of pressure, gas, and heat when subjected to shock, pressure, high temperature, or chemical reaction
    • Rescue plan: a plan used to rescue persons from the Confined Space regardless of confined Space category
    • Lifeline/Retrieval line: a line used for preserving or saving life in a dangerous or potentially dangerous situation
    • Venting: allowing gases or vapors to be released to the atmosphere or flare or a recovery system during depressurization or purging
    • Ventilation: ventilating a vessel or area by using an air-moving device to draw fresh air through the vessel or area
    • Breathing Apparatus: line-air supplied via manually operated pump or cylinders of compressed air, self-contained apparatus carried by the wearer or a recycled air system

    Confined Space Hazard Identification and Preparation

    • Confined space hazard identification shall be recognized by posting sign boards stating the confined space condition
    • Preparation includes:
      • Free of dangerous chemical substances/liquid as far as practically possible for “A” category and mandatory for “B” category
      • Energy isolation in terms of electrical isolation, positive isolation, and radiation source removal
      • No process material remains
      • Sewer openings in immediate area shall be covered
      • Air shall be tested, and ventilation shall be provided
      • Communication systems shall be available

    Ventilation Requirements and Gas Testing for Confined Space

    • Oxygen content between 19.5% to 22.0%
    • Canisters, cartridge, and other forms of filter mask do not constitute Breathing apparatus

    Definitions

    • Lower Explosion Limit (LEL): the minimum concentration of vapor in air below which propagation of flame will not occur in the presence of an ignition source
    • Threshold Limit Value (TLV): toxic gas concentration above which it is not safe to work extended periods
    • Upper Explosive Limit (UEL): the maximum concentration of a flammable/combustible gas, vapor, mist, or dust in air that will support combustion when an ignition source is present
    • Gas Tester: a person who has undergone training on the use of gas detecting equipment and is authorized to conduct gas tests
    • Oxygen Deficient Atmosphere: an atmosphere containing less than 19.5% by volume oxygen at sea level
    • Oxygen Enriched Atmosphere: an atmosphere containing more than 22.5% oxygen by volume

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    Description

    This quiz covers safety guidelines for industrial workplaces, including flammable gases, toxic air contaminants, and temperature regulations.

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