Welding Techniques Flashcards

Which welding position is designated as '2F' in AWS terminology?

Answer: Horizontal fillet weld

The '2F' designation refers to a horizontal fillet weld, where the joint is on a vertical surface and the weld is deposited horizontally.

What is the primary purpose of a tack weld in welding operations?

Answer: To temporarily hold workpieces in alignment before final welding

Tack welds are small, temporary welds used to hold workpieces in proper alignment and position before the final weld is made.

In GMAW (MIG welding), what does 'short-circuit transfer' refer to?

Answer: Metal transfer where the wire touches the weld pool causing a short circuit

Short-circuit transfer occurs when the electrode wire contacts the weld pool, causing a short circuit that melts the wire tip and transfers metal at low voltage.

What is the recommended travel angle for most flat-position welding passes?

Answer: 5 to 15 degrees

A travel angle (drag or push) of 5 to 15 degrees from vertical provides good visibility and proper shielding gas coverage in flat-position welding.

Which technique is used when welding thin sheet metal to reduce distortion?

Answer: Backstep welding sequence

Backstep welding deposits short weld segments in the direction opposite to overall progression, balancing heat input and minimizing distortion on thin materials.

What is undercutting in welding, and what typically causes it?

Answer: A groove melted in the base metal along the weld toe, usually from excessive current or arc length

Undercutting is a groove melted into the base metal along the weld toe that remains unfilled, commonly caused by excessive amperage, arc length, or travel speed.

When using the FCAW process outdoors, which type of flux-cored wire is preferred?

Answer: Self-shielded FCAW wire (FCAW-S)

Self-shielded FCAW wire (FCAW-S) generates its own shielding from the flux core and is preferred outdoors because wind does not blow away external shielding gas.