456A FCAW 2

Question 1

When should slag be removed between passes in multi-pass FCAW welding?

Accepted Answer

All slag must be completely removed between every pass using a chipping hammer and wire brush to prevent slag inclusions

Answer

Only after the final pass

Answer

Only if the slag doesn't look right

Answer

Slag removal is optional in FCAW

Question 2

What CSA standard governs the use of FCAW in structural steel welding in Canada?

Accepted Answer

CSA W59 (Welded Steel Construction) specifies the requirements, and CSA W47.1 (Certification of Companies for Fusion Welding of Steel) governs company certification

Answer

CSA W47.1 only

Answer

No specific standard exists for FCAW

Answer

Only the National Building Code covers welding

Question 3

What are the advantages of gas-shielded FCAW (FCAW-G) over solid-wire GMAW?

Accepted Answer

Higher deposition rates, better out-of-position performance, greater tolerance for mill scale and surface contaminants, and deeper penetration capability

Answer

FCAW-G is always cheaper

Answer

FCAW-G produces no spatter

Answer

FCAW-G requires no slag removal

Question 4

What filler wire classification does E71T-1C/1M represent?

Accepted Answer

A gas-shielded flux-cored wire: E = electrode, 7 = 70 ksi tensile, 1 = all positions, T = tubular (flux-cored), 1 = usability/performance, C = CO₂ shielding (M = mixed gas)

Answer

A solid GMAW wire

Answer

A SMAW electrode

Answer

A submerged arc wire

Question 5

What is the proper technique for FCAW vertical-up welding?

Accepted Answer

Reduce voltage and wire feed speed compared to flat position, use a weave or stringer technique with pauses at the toes, and maintain proper stick-out

Answer

Use the same settings as flat position

Answer

Weld downhill for better penetration

Answer

Increase voltage for better flow

Question 6

What storage requirements apply to FCAW wire to maintain weld quality?

Accepted Answer

Store in a dry, controlled environment away from moisture, dirt, and contaminants; reseal opened packages; some wires require heated storage similar to low-hydrogen SMAW electrodes

Answer

No special storage is needed

Answer

Store underwater to prevent oxidation

Answer

Store in direct sunlight for warmth