Arc Blow is more common in
  • a)
    A.C. welding with straight polarity
  • b)
    DC welding with straight polarity
  • c)
    DC welding with bare electrodes
  • d)
    AC welding with bare electrodes.
Correct answer is option 'C'. Can you explain this answer?

Mechanical Engineering Question

Divya Gaur
Oct 24, 2018
The answer is b.
Arc blow is defined as the deflection of the arc by means of the magnetic fields set up due to the flow of the welding current.
The result of an arc blow is an excessive spatter (throwing out the tiny droplets of the weld metal out of this joint on to the base metal which appear as the tiny dots on the metal plates. The problem of the arc blows gets multiplied when welding is done on the strongly magnetic materials such as the nickel alloys because of the strong magnetic fields set up by these metals. Arc blow problem is faced with the dc arc. 
In the shielded metal arc welding on the direct current, arc blow is caused by the magnetic field, that deflects the arc force and puddle from its normal desired direction. 

This discussion on Arc Blow is more common ina)A.C. welding with straight polarityb)DC welding with straight polarityc)DC welding with bare electrodesd)AC welding with bare electrodes.Correct answer is option 'C'. Can you explain this answer? is done on EduRev Study Group by Mechanical Engineering Students. The Questions and Answers of Arc Blow is more common ina)A.C. welding with straight polarityb)DC welding with straight polarityc)DC welding with bare electrodesd)AC welding with bare electrodes.Correct answer is option 'C'. Can you explain this answer? are solved by group of students and teacher of Mechanical Engineering, which is also the largest student community of Mechanical Engineering. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for Mechanical Engineering on EduRev and even discuss your questions like Arc Blow is more common ina)A.C. welding with straight polarityb)DC welding with straight polarityc)DC welding with bare electrodesd)AC welding with bare electrodes.Correct answer is option 'C'. Can you explain this answer? over here on EduRev! Apart from being the largest Mechanical Engineering community, EduRev has the largest solved Question bank for Mechanical Engineering.

Related Content