Question
Download Solution PDFIn which of the following aspects is DC welding better than AC welding?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF|
DC welding |
AC welding |
|
Motor generator set or rectifier is required in case of the availability of AC supply |
Only the transformer is required |
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The cost of equipment is high |
The cost of equipment is cheap |
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Arc stability is more |
Arc stability is less |
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The heat produced is uniform |
The heat produced is not uniform |
|
Both bare and coated electrodes can be used |
Only coated electrodes should be used |
|
The operating power factor is high |
The power factor is low, So, the capacitors are necessary to improve the power factor |
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It is safer since the no-load voltage is low |
It dangerous since the no-load voltage is high |
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The electric energy consumption is 5-10 kWh/kg of deposited metal |
The electrical energy consumption is 3-4 kWh/kg of deposited metal |
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Arc blow occurs due to the presence of a non-uniform magnetic field |
Arc blow will not occur due to the uniform magnetic field |
|
The efficiency is low due to the rotating parts |
The efficiency is high due to the absence of rotating parts |
Last updated on Jun 16, 2025
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