Certified Welder Welding Process Application 2

Question 1

Which welding process is best suited for welding thin-gauge sheet metal to minimize distortion?

Accepted Answer

Gas Tungsten Arc Welding (GTAW/TIG)

Answer

Submerged Arc Welding (SAW)

Answer

Flux-Cored Arc Welding (FCAW)

Answer

Shielded Metal Arc Welding (SMAW)

Question 2

In GMAW short-circuit transfer mode, metal transfer occurs when:

Accepted Answer

The wire electrode touches and short-circuits to the base metal

Answer

The arc voltage is at its highest point

Answer

Shielding gas pressure exceeds 30 CFH

Answer

Wire feed speed drops below the minimum setting

Question 3

What is the primary advantage of using the Flux-Cored Arc Welding (FCAW) process outdoors?

Accepted Answer

The flux core provides shielding that is less affected by wind than external gas

Answer

It requires no electrical power source

Answer

It produces no spatter compared to other processes

Answer

It operates at lower amperages than SMAW

Question 4

Which parameter most directly controls penetration depth in SMAW welding?

Accepted Answer

Amperage (current)

Answer

Electrode diameter only

Answer

Travel speed only

Answer

Arc voltage

Question 5

When welding with the GTAW process, a high-frequency (HF) start is used to:

Accepted Answer

Initiate the arc without touching the electrode to the workpiece

Answer

Increase wire feed speed automatically

Answer

Preheat the base metal before welding

Answer

Clean the weld pool of oxides during welding

Question 6

Plasma Arc Welding (PAW) differs from GTAW primarily because it:

Accepted Answer

Constricts the arc through a nozzle orifice to produce higher energy density

Answer

Uses a consumable electrode instead of tungsten

Answer

Requires no shielding gas

Answer

Can only weld ferrous metals

Question 7

Which transfer mode in GMAW produces the least spatter and is used for spray-type metal transfer?

Accepted Answer

Spray transfer

Answer

Short-circuit transfer

Answer

Globular transfer

Answer

Pulsed transfer