Question

An irregular, dense white spot is seen on the radiograph of a weld. Assuming it was caused by the welding process used, which one of the processes below would be responsible?

a) SMAW process
b) GTAW process
c) GMAW process
d) ST process
e) ESW process

Answer 1

An irregular, dense white spot seen on a radiograph of a weld can indicate porosity, which is caused by the entrapment of gas pockets during the welding process. The GMAW process is most likely responsible for porosity.

Step-by-step explanation:

An irregular, dense white spot seen on a radiograph of a weld can be an indication of porosity. Porosity is caused by the entrapment of gas pockets during the welding process, resulting in voids or cavities within the weld material.

Out of the given processes, the process that is most likely responsible for porosity is the GMAW (Gas Metal Arc Welding) process. GMAW uses a consumable electrode and a shielding gas, which can contribute to the formation of gas pockets if not properly controlled. The SMAW (Shielded Metal Arc Welding), GTAW (Gas Tungsten Arc Welding), ST (Submerged Arc Welding), and ESW (Electros lag Welding) processes are less likely to cause porosity, as they do not involve the use of a shielding gas that can trap gas within the weld.