Electrical Machines
The type of DC generator used for arc welding purpose is a

 differentially compounded generator
 shunt generator
 cumulatively compounded generator
 series generator

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Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

  worsen and terminal voltage will rise.
  improve and terminal voltage will rise .
  worsen and terminal voltage will fall
 improve but terminal voltage will fall.

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