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CUTTING AND WELDING OPERATIONS

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Fiberglass isn’t totally safe to work with. Certain safety precautions must be observed when working with or around fiberglass. If fiberglass is cut or ground, a fine dust is produced. This dust is abrasive and can irritate your skin and eyes. Use a filter mask respirator when working in this type of atmosphere. The chemicals used in making fiberglass and fiber glass  patches  are  very  flammable  and  toxic.  Provide adequate  ventilation  to  remove  the  fumes  and  dust particles. Most important, never smoke in areas where fiberglass work is being carried out. REVIEW 8 QUESTIONS Q1.   What is the cause of many fatal shocks received from drills and fans? Q2.   List  the  three  types  of  hazards  associated  with compressed gases. a. b. c. Q3.   True or false. Oxygen and chlorine are stowed in compartments separate from flammable gases. Q4.   Why  should  you  use  a  filter  mask  respirator when working with fiberglass? POWER TOOLS During  your  career  in  the  Navy,  you  may  be required to use a variety of power tools. Whether these tools are electrical, pneumatic, or hydraulic, the same common sense safety precautions apply to all of them. Before you use a portable electric tool for the first time,  have  it  inspected  and  approved  by  the  ship’s electrical department for safety. If it has a current ship’s inspection  mark,  visually  examine  the  attached  cable for  any  cracks,  breaks,  exposed  conductors,  or  a damaged plug. If any defects are found, turn the tool in to the ship’s electrical shop for repair. Before plugging an electric tool into a receptacle, make sure the tool is turned off. When using portable electrical tools, wear safety glasses or goggles if the job involves danger from flying objects, such as paint or metal chips. You should also  wear  ear  protection  devices  if  the  tool  has  a “Produces Hazardous Noise” label on it. Metal-cased  portable  electric  tools  must  have  a three-pronged plug on the power cord. If an extension cord is used, it must be the three-pronged type with a three-pronged  plug  at  one  end  and  a  three-pronged receptacle  at  the  other  end.  When  using  an  extension cord with an electric tool, you must first plug the tool into the extension cord and then the extension cord into the receptacle. When you are finished with the electric tool, switch it off, unplug the extension cord from the receptacle, and then unplug the tool. Portable  tools  should  be  kept  clean  and  in  good repair. Arcing portable tools are not to be used in areas where  flammable  vapors,  gases,  liquids,  or  exposed explosives are kept. CUTTING AND WELDING OPERATIONS The convenience of arc and gas welding and cutting allows  the  performance  of  repair  jobs  in  almost  any location. Failure to use proper safety precautions during welding  or  cutting  operations  presents  a  serious  fire hazard.  Only  properly  trained  personnel  should operate gas welding or cutting equipment. Because cutting and welding operations are continuously being performed throughout the ship, you may be called upon to stand a fire watch and must be familiar with the safety precautions of such operations. The following are some basic precautions to be taken during welding or cutting operations: The  gases  used  in  welding  and  cutting  are explosive. When one of these gases is mixed with air, the mixture will burst into flames if a spark or flame is brought near it. 19-16 Student Notes:



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