Which one of the following is the most conservative fatigue failure criterion? (A) Soderberg (B)…

Which one of the following is the most conservative fatigue failure criterion? (A) Soderberg (B) Modified Goodman (C) ASME Elliptic (D) Gerber. In a linear arc welding process, the heat input per unit length is inversely proportional to (A) welding current (B) welding voltage (C) welding speed (D) duty cycle of the power source