Question

quiz
question 2 of 8
select one way to correct burn through:
reduce arc length
increase amperage
use a smaller electrode
increase travel speed

Explanation:

Identify the welding defect

The question asks for a way to correct "burn through." Burn through occurs when excessive heat input melts completely through the base metal, leaving an open hole in the weld joint. This is a common issue under the category of Welding Defects.

Analyze the cause of burn through

Burn through is primarily caused by excessive heat input per unit length of the weld. The factors that increase heat input include:

• High amperage (current)
• Slow travel speed (allowing heat to build up in one spot)
• Excessive arc length (which can increase voltage and overall heat)

Evaluate the given options

• Reduce arc length: While reducing arc length can help control the arc, it is not the primary corrective action for burn through.
• Increase amperage: Increasing amperage increases heat input, which would worsen burn through.
• Use a smaller electrode: A smaller electrode might reduce heat, but it is not the most direct operational adjustment compared to travel speed.
• Increase travel speed: Increasing travel speed reduces the amount of time the arc dwells over any single point of the metal. This directly decreases the localized heat input, preventing the puddle from melting all the way through the base metal.

Answer:

• Reduce arc length
• Increase amperage
• Use a smaller electrode
• Increase travel speed (Correct answer)