aws cwi practice test

Q:- The purpose of the hot pass is to

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  • Improve fusion
  • Improve profile
  • Remove hydrogen
  • Remove sulphur

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Q:- For the structure termed martensitic to form in a c-mn steel it must first be heated to just below a critical temperature and rapidly cooled

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  • Just below its lower critical temperature and rapidly cooled
  • A maximum temperature of 550*C then rapidly cooled
  • Above its upper critical temperature and slowly furnace cooled
  • A full transformation to austenite then rapidly cooled