Propane in Construction
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Questions and Answers

Which of the following is a hazard presented by propane if misused?

  • High flammability and explosive potential (correct)
  • Low toxicity and explosive potential
  • High toxicity and explosive potential
  • Low flammability and explosive potential

    • What is the boiling point of propane?

  • -42.2°C (-44°F) (correct)
  • -32.2°C (-26°F)
  • -52.2°C (-62°F)
  • -22.2°C (-8°F)

    • In what form is propane stored?

  • Gas
  • Vapor
  • Liquid (correct)
  • Solid

    • What happens to propane when it is released from the cylinder or tank?

    <p>It converts to a gaseous form</p> Signup and view all the answers

    Which industry is not covered in this manual?

    <p>Roofing industry</p> Signup and view all the answers

    What is the main by-product of propane?

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

    What is one of the hazards of propane in confined spaces?

    <p>Displacement of breathable air</p> Signup and view all the answers

    What happens if the surrounding air temperature is above the boiling point of propane?

    <p>Gas will form in the upper part of the cylinder</p> Signup and view all the answers

    What is the weight of propane compared to air?

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

    What type of injury can occur from accidental exposure to propane under high pressure?

    <p>Contact injury</p> Signup and view all the answers

    Which fuel has a higher heating value compared to natural gas?

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

    How many BTUs does one cubic foot of natural gas convert to?

    <p>1000</p> Signup and view all the answers

    What is the heating value of one cubic foot of propane?

    <p>2500 BTUs</p> Signup and view all the answers

    Why is propane considered a convenient fuel for contractors?

    <p>It is readily available</p> Signup and view all the answers

    What happens if there is a tiny leak of propane?

    <p>Explosive gas/air mixture forms</p> Signup and view all the answers

    What is the weight of propane compared to air?

    <p>Propane is heavier than air</p> Signup and view all the answers

    What is one of the hazards of handling propane?

    <p>Propane can cause explosions</p> Signup and view all the answers

    Which of the following is the reason why containers are never fully charged with liquid?

    <p>To allow for normal expansion</p> Signup and view all the answers

    What is the pressure at which cylinder relief valves are set?

    <p>2585.5 kPa</p> Signup and view all the answers

    What is the purpose of a relief valve in a propane container?

    <p>To release gas in case of high temperature</p> Signup and view all the answers

    What is the volume expansion of propane when it converts from liquid to gas?

    <p>270 times</p> Signup and view all the answers

    What is the weight of a 100 lb. propane cylinder when fully charged with liquid?

    <p>375 lbs.</p> Signup and view all the answers

    Which type of cylinder is commonly used for oxypropane welding set-ups?

    <p>20 lb. cylinder</p> Signup and view all the answers

    What is the purpose of the vapour space at the top of a propane tank?

    <p>To allow for normal expansion</p> Signup and view all the answers

    Where should propane cylinders be stored on a jobsite?

    <p>In a separate compound</p> Signup and view all the answers

    What can happen if escaping propane gas collects in a confined space?

    <p>It can create an explosive atmosphere</p> Signup and view all the answers

    How far should propane cylinders be stored from a property line?

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

    Where should empty and full propane cylinders be stored?

    <p>On one side and the other</p> Signup and view all the answers

    What can be used to construct a compound for storing propane cylinders?

    <p>Snow fence and T-bars</p> Signup and view all the answers

    Why should propane containers never be fully charged with liquid?

    <p>To allow for expansion</p> Signup and view all the answers

    What is the purpose of a relief valve in a propane container?

    <p>To prevent leaks</p> Signup and view all the answers

    What is one of the hazards of handling propane?

    <p>It can cause frostbite</p> Signup and view all the answers

    Which of the following is a potential hazard of mishandling propane?

    <p>Fire and explosion</p> Signup and view all the answers

    What is the recommended position for transporting and storing portable propane cylinders?

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

    What can happen if liquid propane escapes through the relief valve?

    <p>Large volumes of gas will be released</p> Signup and view all the answers

    What is the minimum temperature at which propane gas can ignite?

    <p>1000°F</p> Signup and view all the answers

    What is the recommended method for securing propane cylinders during transportation?

    <p>Fastening them in an upright position with rope, wire, or other means</p> Signup and view all the answers

    What should be avoided when transporting propane cylinders by truck?

    <p>Keeping cylinders in an automobile trunk</p> Signup and view all the answers

    In what form is propane typically dispensed in construction applications?

    <p>Vapor form</p> Signup and view all the answers

    What is the potential hazard of propane in confined spaces?

    <p>Displacement of air</p> Signup and view all the answers

    Which type of cylinders should be used according to the text?

    <p>Cylinders that are less than 10 years old</p> Signup and view all the answers

    Where should cylinders that are not in use be stored?

    <p>Outside the building</p> Signup and view all the answers

    What precaution should be taken when moving cylinders of gas around the jobsite?

    <p>Keep cylinders upright</p> Signup and view all the answers

    When can propane be stored inside a building?

    <p>When it is in a specially constructed explosion-proof room</p> Signup and view all the answers

    What is the purpose of the regulator in a propane tank?

    <p>To reduce pressure in the tank</p> Signup and view all the answers

    Why should propane cylinders not be located in stairwells and hallways?

    <p>To avoid blocking exits</p> Signup and view all the answers

    According to construction regulations under the Occupational Health and Safety Act, what is prohibited when moving cylinders from one level to another?

    <p>Using a sling</p> Signup and view all the answers

    When hooking up and using construction heaters, who should make all connections?

    <p>A licensed service personnel</p> Signup and view all the answers

    How far should propane cylinders be placed away from construction heaters?

    <p>At least 20 feet</p> Signup and view all the answers

    Which type of fire extinguisher should be on hand before lighting the heater?

    <p>4A40BC</p> Signup and view all the answers

    What should be done when the hose line is full of gas after slowly opening the cylinder valve?

    <p>Check for leaks with soapy water or a leak detector</p> Signup and view all the answers

    What should be done if a gas odor or frost appears on a fitting?

    <p>Shut off the cylinder valve and make corrections</p> Signup and view all the answers

    What may happen if the cylinder valve is opened too quickly?

    <p>The check valve may slug and shut off gas flow</p> Signup and view all the answers

    What is the purpose of the excess flow check valve?

    <p>To shut off gas flow if the regulator is broken off</p> Signup and view all the answers

    What should be done if trouble develops with the heater?

    <p>Close the cylinder valve</p> Signup and view all the answers

    Where should propane cylinders be stored on a jobsite?

    <p>In the same room as the heater</p> Signup and view all the answers

    What should be watched for when using a burner?

    <p>A drop in pressure</p> Signup and view all the answers

    Which of the following is a potential consequence of increasing the amount of vapor in a propane cylinder by applying heat?

    <p>The cylinder may explode</p> Signup and view all the answers

    What is the maximum number of 100-pound cylinders that should be manifolded together for heaters?

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

    If other heaters with manifolded cylinders are operated in the same area, how far should they be from each other?

    <p>At least fifty feet away</p> Signup and view all the answers

    What is the recommended personal protective equipment when handling propane?

    <p>Goggles, long sleeves, and gloves</p> Signup and view all the answers

    What should be done in case of an emergency involving propane?

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

    What is the purpose of a firewall in relation to heaters with manifolded cylinders?

    <p>To increase operating time</p> Signup and view all the answers

    What are the recommended storage conditions for propane cylinders on a jobsite?

    <p>In a secure outdoor location</p> Signup and view all the answers

    What are the recommended storage conditions for cylinders that are not in use?

    <p>Upright and secured</p> Signup and view all the answers

    Which of the following areas is likely to collect propane gas due to its heaviness?

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

    What should you do if a construction heater is defective?

    <p>Replace it</p> Signup and view all the answers

    What should you do if the flame on a heater goes out?

    <p>Turn off the gas supply and relight it</p> Signup and view all the answers

    What should you do if you suspect escaped gas in a confined space?

    <p>Test with a gas detection device</p> Signup and view all the answers

    What should you do if you come into contact with liquid propane?

    <p>Wash it off immediately</p> Signup and view all the answers

    What should you do if a construction heater is inadequate?

    <p>Replace it with a larger one</p> Signup and view all the answers

    What should you do if you smell propane in a confined space?

    <p>Ventilate and purge the area before relighting</p> Signup and view all the answers

    What should you do if you suspect escaped gas in a confined or low-lying area?

    <p>Ventilate and purge the area before testing</p> Signup and view all the answers

    What should you do if your clothing becomes saturated with propane?

    <p>Remove and air it outside</p> Signup and view all the answers

    What should you do before attempting to relight a heater with escaped gas?

    <p>Ventilate and purge the area thoroughly</p> Signup and view all the answers

    Which type of heaters are commonly used on large construction projects?

    <p>Propane construction heaters</p> Signup and view all the answers

    Who is responsible for installing the bulk tank and feed lines for propane construction heaters?

    <p>Licensed service personnel</p> Signup and view all the answers

    What are the hook-up points called on the feed lines for propane construction heaters?

    <p>Station valves</p> Signup and view all the answers

    What should be checked after installing the flexible heater line for propane construction heaters?

    <p>Leak at the hook-up point</p> Signup and view all the answers

    What should be done if heat is required in an area not serviced by a valve for propane construction heaters?

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

    What is the maximum recommended length for the flexible hose between the heater and station valve for propane construction heaters?

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

    What other application has propane become a popular energy source for, besides construction heaters?

    <p>Open flame welding and cutting</p> Signup and view all the answers

    Which type of cylinders are generally smaller than those used for construction heaters?

    <p>Propane cylinders</p> Signup and view all the answers

    What should be done to fittings before hooking them up to propane welding cylinders?

    <p>Clean them and remove grease</p> Signup and view all the answers

    What should be used to avoid damage to fittings when connecting them to propane welding cylinders?

    <p>Proper fitting wrenches</p> Signup and view all the answers

    How should propane cylinders be positioned at all times?

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

    What is the recommended method to prevent propane cylinders from tipping over when in use?

    <p>Tying them upright</p> Signup and view all the answers

    What should be done to propane welding cylinders when they are not in use?

    <p>Disconnect them from fittings</p> Signup and view all the answers

    What is one of the hazards of mishandling propane?

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

    Which of the following is a potential consequence of mishandling propane?

    <p>Increased flame temperature</p> Signup and view all the answers

    What is the purpose of the relief valve in a propane system?

    <p>To prevent excess flow of propane</p> Signup and view all the answers

    What should be done if there is a suspected gas leak in a confined or low-lying area?

    <p>Ventilate the area immediately</p> Signup and view all the answers

    What is the recommended method for transporting propane cylinders?

    <p>Using proper gear for hoisting or moving</p> Signup and view all the answers

    What should be done before storing propane cylinders that are not in use?

    <p>Remove the regulators and store them separately</p> Signup and view all the answers

    What should be avoided when using heaters in proximity to propane cylinders?

    <p>Keeping flammables away from heaters</p> Signup and view all the answers

    What is the recommended storage condition for propane cylinders on a jobsite?

    <p>Away from heat sources</p> Signup and view all the answers

    What should be done if liquid propane comes into contact with the skin?

    <p>Wash the area with water immediately</p> Signup and view all the answers

    What should you do if you suspect leaking gas in an area?

    <p>Ventilate the area immediately</p> Signup and view all the answers

    Study Notes

    Hazards of Propane Misuse

    • Propane can cause asphyxiation, explosion, or fire if misused
    • It can displace oxygen in confined spaces, leading to asphyxiation

    Physical Properties of Propane

    • Boiling point of propane: -42.2°C (-43.6°F)
    • Stored as a liquid under pressure in cylinders or tanks
    • Expands 270 times when released from a cylinder or tank

    Safety Precautions

    • Propane is 1.5 times heavier than air
    • Can collect in low-lying areas and confined spaces, leading to hazards
    • Can cause frostbite or injury if accidentally exposed under high pressure

    Industry and Applications

    • Propane is a convenient fuel for contractors due to its portability and energy density
    • Heating value of propane: 91,500 BTU/ft³
    • 1 cubic foot of natural gas converts to 1,025 BTU

    Cylinder Handling and Storage

    • Cylinders should be stored upright, secured, and away from property lines
    • Empty and full cylinders should be stored separately
    • Relief valves are set to 375 psig to prevent over-pressurization
    • Vapour space at the top of a tank allows for thermal expansion

    Transportation and Installation

    • Propane cylinders should be transported and stored in a secure, upright position
    • Cylinders should be placed on a level surface, away from heat sources and open flames
    • Bulk tanks and feed lines should be installed by a qualified technician

    Safety Procedures

    • In case of an emergency, evacuate the area and report the incident
    • If you smell propane in a confined space, evacuate and ventilate the area
    • If you come into contact with liquid propane, wash the affected area and seek medical attention

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    Description

    Test your knowledge on propane safety and hazards with this quiz designed for those in the construction industry. Learn about the flammability and explosive potential of propane, its ability to displace breathable air in confined spaces, and the risks of accidental exposure. Challenge yourself and enhance your understanding of propane safety measures.

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