Flashback Arrestors and Oxygen Cylinder Safety Quiz
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Questions and Answers

What types of welding are mentioned in the text?

  • Oxyfuel, laser, and spot
  • Gas, electric arc, and electric resistance (correct)
  • TIG, MIG, and Stick
  • Gas, friction, and ultrasonic
  • When was welding as we know it today invented?

  • 20th century
  • Bronze Age
  • 18th century
  • 19th century (correct)
  • What were some of the first successful commercially manufactured aircraft constructed from?

  • Aluminum sheet metal
  • Wood and canvas
  • Riveted steel plates
  • Welded steel tube frames (correct)
  • Which lighter metals were mentioned as being used in aircraft construction?

    <p>Aluminum, magnesium, and titanium</p> Signup and view all the answers

    What is traditionally defined as a welding process in the text?

    <p>Joining metal by melting or hammering the work pieces</p> Signup and view all the answers

    Who can learn to weld according to the text?

    <p>Almost anyone with some basic mechanical skill, dexterity, and practice</p> Signup and view all the answers

    What is the purpose of saturating the cylinders with acetone?

    <p>To increase the stability of acetylene</p> Signup and view all the answers

    Why should the acetylene pressure gauge never be set higher than 15 psi for welding or cutting?

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

    What is the main function of a pressure regulator attached to a gas cylinder?

    <p>To lower the cylinder pressure to the desired working pressure</p> Signup and view all the answers

    Which gas is known for its very low chemical reactivity and non-toxic nature?

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

    In what state does helium normally exist?

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

    What does turning the adjustment knob of a pressure regulator 'in' typically do?

    <p>Increase flow and pressure</p> Signup and view all the answers

    Why is it recommended to stand off to the side away from the face of the gauges when opening the oxygen cylinder valve?

    <p>To reduce the risk of injury in case of a cylinder leak</p> Signup and view all the answers

    What is the purpose of installing flashback arrestors between the regulator and hose?

    <p>To stop the flow of gas in case of flashback</p> Signup and view all the answers

    Why should the acetylene cylinder shutoff valve be opened slowly and then one half of a turn more?

    <p>To allow for a quick shutoff if needed</p> Signup and view all the answers

    Why should cylinders not be depleted in content below 20 psi as a safety practice?

    <p>To maintain pressure for safe operation</p> Signup and view all the answers

    What is the correct process to blow out both hoses before attaching them to the torch?

    <p>Turn the pressure adjusting screw in until gas escapes, then back it out quickly</p> Signup and view all the answers

    What should be done before connecting the red hose to the torch?

    <p>Verify that it's a left-hand thread connector nut</p> Signup and view all the answers

    What is the potential consequence of operating torch tips at less than the required volume of gas?

    <p>Tip overheating and possible flashbacks</p> Signup and view all the answers

    Which factor makes the selection of the tip size important for welding equipment operation?

    <p>Quality of the weld and efficiency of the cutting process</p> Signup and view all the answers

    What can obstructed tip orifices lead to during welding?

    <p>Tip overheating and flashback conditions</p> Signup and view all the answers

    Which consequence can result from using an incorrect tip size during welding?

    <p>Overheating and flashback conditions</p> Signup and view all the answers

    What is a potential issue caused by starvation in torch tips?

    <p>Tip overheating and possible flashbacks</p> Signup and view all the answers

    How can incorrect tip size impact the welding process?

    <p>Overheating and flashback conditions</p> Signup and view all the answers

    What is an important consideration when attempting to weld aluminum for the first time?

    <p>Using a torch with a neutral flame</p> Signup and view all the answers

    How does holding the torch at an angle of about 30° to the surface affect the aluminum welding process?

    <p>Allows better control of heat and prevents holes from forming in the metal</p> Signup and view all the answers

    What thickness range is usually recommended for aluminum gas welding?

    <p>0.031-inch to 0.125-inch</p> Signup and view all the answers

    Which of the following aluminum alloys is NOT mentioned as weldable in the text?

    <p>2014</p> Signup and view all the answers

    What is recommended as a practice step before attempting butt joint welding in aluminum?

    <p>Practicing on flanged joints with filler rod</p> Signup and view all the answers

    Why is it necessary to observe how aluminum reacts under the welding flame before attempting to weld it?

    <p>To achieve a successful and satisfactory weld</p> Signup and view all the answers

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