engineering recuitment GATE ME 2023-24 Test Series Production Engineering (Manufacturing) Joining Welding
In a DC welding operation, the power P(kW) - arc length L(mm) characteristic is given by P = 5 + 0.6L - 0.1L2 and the voltage length characteristic is given by V = (45 + 5L) volts, where L is in mm. The open-circuit voltage is found to be 90 V. Then
1
For maximum arc power, the voltage should be 60 V
2
For maximum arc power, the current should be 295 A
3
The short circuit current will be 295 A
4
The maximum arc power possible is 5.9 kW