SAW Welding Techniques & Process Control 2

Question 1

In SAW, what effect does increasing travel speed have on the weld bead?

Accepted Answer

Narrower bead with less penetration

Answer

Higher travel speed reduces heat input per unit length, resulting in a narrower bead with shallower penetration.

Question 2

Which SAW technique involves two electrodes fed simultaneously into a single weld pool?

Accepted Answer

Twin-wire SAW

Answer

Twin-wire SAW uses two electrodes connected to the same power source, feeding into a single molten pool to increase deposition rate.

Question 3

What is the primary purpose of flux backing in SAW of single-sided groove welds?

Accepted Answer

To support the molten pool and form a sound root bead

Answer

Flux backing supports the weld pool on the root side, preventing burn-through and producing a fully fused root bead.

Question 4

In tandem SAW, the leading electrode is typically set to which polarity to maximize penetration?

Accepted Answer

DCEP (DC electrode positive)

Answer

DCEP on the leading electrode concentrates heat at the workpiece, maximizing penetration into the joint.

Question 5

What welding parameter most directly controls the width of the flux coverage zone in SAW?

Accepted Answer

Flux hopper height above the work

Answer

The height of the flux hopper above the workpiece determines how wide the flux pile spreads, affecting coverage width.

(SAW) Submerged Arc Welding Certification Practice Test