CWI Welding Process Principles 2

Question 1

In SMAW, what is the primary purpose of the flux coating on the electrode?

Accepted Answer

Provide shielding gas and slag protection

Answer

Increase electrical conductivity

Answer

Increase deposition rate

Answer

Preheat the base metal

Question 2

Which welding process uses a non-consumable tungsten electrode?

Accepted Answer

GTAW

Answer

SMAW

Answer

GMAW

Answer

SAW

Question 3

What does the term 'polarity' refer to in arc welding?

Accepted Answer

The direction of current flow in the welding circuit

Answer

The angle of the electrode

Answer

The type of shielding gas used

Answer

The travel speed of the electrode

Question 4

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

Accepted Answer

The wire tip contacts the weld pool and the arc extinguishes momentarily

Answer

The arc voltage is very high

Answer

Shielding gas pressure drops

Answer

The wire feed speed decreases

Question 5

Which of the following best describes the 'keyhole' technique used in plasma arc welding?

Accepted Answer

A small hole formed through the full thickness of the joint by the plasma arc

Answer

A narrow groove preparation in the base metal

Answer

A fixture used to align pipe joints

Answer

A post-weld inspection method

Question 6

What is the main advantage of using DCEP (direct current electrode positive) in SMAW?

Accepted Answer

Reduced spatter and deeper penetration

Answer

Better arc stability on thin materials

Answer

Suitable for welding aluminum with AC

Answer

Lower heat input to the electrode

Question 7

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

Accepted Answer

A layer of granular flux that covers the arc

Answer

A mixture of argon and CO2 gas

Answer

Slag from a coated electrode

Answer

Pure helium gas