Welding Processes & Techniques Flashcards
7 cards from real WCL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Welding Processes & Techniques flashcards as text
What is 'globular transfer' in GMAW and when does it typically occur?
Answer: Large irregular droplets that transfer across the arc, often with spatter, at intermediate voltage/amperage
Globular transfer produces large, irregular molten droplets that fall across the arc under gravity, causing significant spatter at intermediate voltage settings.
In submerged arc welding (SAW), what function does the granular flux serve?
Answer: It shields the arc and weld pool from atmosphere, and can add alloying elements to the weld
In SAW, the granular flux blankets the arc and molten pool to provide atmospheric shielding and can contribute alloying elements to the weld metal.
What does 'stringer bead' mean in welding technique?
Answer: A narrow bead deposited by moving the electrode straight along the joint with little or no weaving
A stringer bead is deposited by moving the electrode along the joint in a straight line without lateral weaving, producing a narrow, consistent bead.
Which type of joint is created when two pieces of metal are placed end-to-end in the same plane and welded?
Answer: Butt joint
A butt joint is formed when two pieces are placed end-to-end in the same plane and welded along their edges.
What is the significance of the 'duty cycle' rating on a welding power source?
Answer: The percentage of a 10-minute period the machine can weld at a rated amperage without overheating
Duty cycle indicates the percentage of a 10-minute period a machine can operate at its rated output before needing to cool down to prevent overheating.
When GTAW welding stainless steel, what contamination can occur if the tungsten electrode accidentally contacts the weld pool?
Answer: Tungsten inclusions in the weld metal
If the tungsten electrode touches the weld pool, tungsten particles can become embedded in the weld, causing tungsten inclusions that are a rejectable discontinuity.
What is the AWS definition of a 'groove weld'?
Answer: A weld made in the groove between two members to be joined
A groove weld is deposited in a groove between two members to join them, providing full or partial joint penetration depending on the joint design.