Final answer:
Removing a GMAW or FCAW gun too early can cause a crack to form at the crater because it disrupts the cooling and solidification process, leading to a weakened weld.
Step-by-step explanation:
The question asks about consequences related to Gas Metal Arc Welding (GMAW) or Flux-Cored Arc Welding (FCAW) processes when a welding gun is removed before the crater solidifies.
Removing a GMAW or FCA W gun before a crater has solidified will cause a: A. Crack.In the context of welding, when the gun is prematurely removed and the weld pool has not solidified, this can lead to a disruption in the cooling process. The rapid cooling at the crater's edge can result in insufficient filling of the crater, which may lead to the formation of a crater crack after solidification.
Such cracks can act as stress concentrators and provide a starting point for further cracking under stress or impact load, thereby significantly reducing the overall strength and integrity of the weld.