Certified Welder Welding Processes & Techniques 2

Question 1

Which welding process uses a consumable electrode wire fed automatically through a welding gun with shielding gas supplied externally?

Accepted Answer

GMAW

Answer

SMAW

Answer

GTAW

Answer

SAW

Question 2

In submerged arc welding (SAW), the arc is shielded by:

Accepted Answer

A granular flux blanket

Answer

Compressed argon gas

Answer

A flux-coated electrode

Answer

A ceramic backing

Question 3

What is the primary advantage of plasma arc welding (PAW) over GTAW?

Accepted Answer

Higher energy density and faster travel speeds

Answer

Lower equipment cost

Answer

No shielding gas required

Answer

Suitable for all metals without pre-cleaning

Question 4

Which FCAW mode uses only the flux inside the tubular electrode for shielding with no external gas supply?

Accepted Answer

Self-shielded FCAW

Answer

Dual-shield FCAW

Answer

Gas-shielded FCAW

Answer

Open-arc FCAW

Question 5

During GTAW welding of aluminum, which current type is typically recommended?

Accepted Answer

AC (alternating current)

Answer

DCEN (electrode negative)

Answer

DCEP (electrode positive)

Answer

High-frequency DC

Question 6

In electroslag welding (ESW), the primary heat source is:

Accepted Answer

Resistance heating through molten conductive slag

Answer

An electric arc between electrode and base metal

Answer

Friction between a rotating tool and workpiece

Answer

Combustion of acetylene and oxygen

Question 7

What does the term 'keyhole' refer to in plasma arc and laser welding?

Accepted Answer

A through-hole penetration technique for full-fusion welding

Answer

The shape of the weld bead cross-section

Answer

A backing bar slot used for root pass access

Answer

The shape of the electrode tip