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Wednesday, 18 April 2012

Important basic concepts in Production technology and Foundary (GATE-2018) Part-2


The present post (Part-2) contains the important basic concepts in Production technology in Mechanical Engineering. Note down each concept which might help in GATE 2018 Mechanical.


    An important factor to be considered while designing a core print is molding sand characteristics.

  • Weld spatter refers to welding defect.
  • If ‘t’ is the thickness of the sheet to be spot welded, then electrode tip diameter is equal to √t.
  • A  sprue is a tool used in mold repairing.
  • Gate is a vent hole to allow for the hot gases to escape.
  • Core prints provided to from seat to support and hold the core.
  • The equipment that is used in the pit for the supply of air is known as a centrifugal blower.
  • Draft allowance on castings is generally 1-2 mm/M.
  • Tumbling is done so as to clean the surface of small parts.
  • The purpose of inoculation is to modify the structure and properties of a cast metal.
  • The draft allowance on the metallic pattern as compared to wooden ones is less.
  • Angle iron is not an angle measuring device.
  • The mould for casting ferrous materials in continuous casting process is made of copper.
  • If V is the volume of metal in a casting and A its surface areas, then a time of solidification will be proportional to V2, 1/A2.

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