Mechanical Engineering - Manufacturing Science - Welding

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Question - 1

An example of fusion welding is

  • A gas welding 
  • B arc welding
  • C thermit welding
  • D forge welding

Question - 2

a welding, a flux is used to

  • A permit perfect cohesion of metals
  • B remove the oxides of the metals formed at high temperature
  • C None of the above
  • D Both (a) and (b)

Question - 3

The welding process in which two pieces to be joined are overlapped and placed between two electrodes, is called

  • A projection welding 
  • B spot welding
  • C butt welding
  • D seam welding

Question - 4

The temperature of arc in flame within the range of

  • A 2000oC to 4000°C 
  • B 4000°C to 6000oC
  • C below 1000oC
  • D above 6000oC

Question - 5

A consumable electrode is used in

  • A MIG welding
  • B TIG welding
  • C submerged arc welding
  • D All of these

Question - 6

Welding process, in which electrode is not consumed is

  • A Tungsten Inert Gas (TIG) welding
  • B MIG welding
  • C Both (a) and (b)
  • D None of the above

Question - 7

In gas welding, maximum flame temperature occurs at

  • A inner cone
  • B outer cone
  • C tip of the flame
  • D same at each point

Question - 8

Carburising flame is obtained by supplying

  • A equal volumes of oxygen and acetylene
  • B more volume of acetylene and less volume of oxygen
  • C more volume of oxygen and less volume of acetylene
  • D None of the above

Question - 9

Neutral flame is obtained by supplying

  • A equal volumes of oxygen and acetylene
  • B more volume of acetylene and less volume of oxygen
  • C more volume of oxygen and less volume of acetylene
  • D None of the above

Question - 10

Oxidising flame is obtained by supplying

  • A equal volumes of oxygen and acetylene
  • B more volume of acetylene and less volume of oxygen
  • C more volume of oxygen and less volume of acetylene
  • D None of the above