Question

During a $TIG$ welding process, the arc current and arc voltage were $50A$ and $60V$ respectively, when the welding speed was $150,mm/min$. In another process, the $TIG$ welding is carried out at a welding speed of $120mm/min$ at the same are voltage and heat input to the material so that weld quality remains the same. The welding current (in $A$) for this process is

• A. $62.25$
• B. $44.72$
• C. $40.00$
• D. $55.90$

Answer 1

The correct option is C $40.00$

$\frac{50\times 60}{150}=\frac{I\times 60}{120}$

$I=\frac{50\times 12}{155}=40A$