In an arc welding process, the voltage and current are 25 Volts and 300 amperes respectively. The arc heat transfer efficiency is 0.85 and welding speed is 8 mm/s, the net heat input (in J/mm) will be:

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SJVN ET Mechanical 2019 Official Paper
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  1. 796.8
  2. 684.2
  3. 620.7
  4. 721.6

Answer (Detailed Solution Below)

Option 1 : 796.8
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Detailed Solution

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Concept:

The net heat input in arc welding is calculated using:

Given:

  • Voltage,
  • Current,
  • Efficiency,
  • Welding Speed,

Calculation:

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